CVE-2026-53362

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53362", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.400Z", "datePublished": "2026-07-04T11:56:35.864Z", "dateUpdated": "2026-10-15T01:23:25.441Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:50:29.351Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: account for fraggap on the paged allocation path\n\nIn __ip6_append_data(), when the paged-allocation branch is taken\n(MSG_MORE / NETIF_F_SG / large fraglen), alloclen and pagedlen are\ncomputed as\n\n\talloclen = fragheaderlen + transhdrlen;\n\tpagedlen = datalen - transhdrlen;\n\ndatalen already includes fraggap (datalen = length + fraggap). When\nfraggap is non-zero, this is not the first skb and transhdrlen is zero.\nThe fraggap bytes carried over from the previous skb are copied just past\nthe fragment headers in the new skb's linear area. The linear area is\ntherefore undersized by fraggap bytes while pagedlen is overstated by the\nsame amount, and the copy writes past skb->end into the trailing\nskb_shared_info.\n\nAn unprivileged user can trigger this via a UDPv6 socket using\nMSG_MORE together with MSG_SPLICE_PAGES.\n\nThe bad accounting was introduced by commit 773ba4fe9104 (\"ipv6:\navoid partial copy for zc\"). Before commit ce650a166335 (\"udp6: Fix\n__ip6_append_data()'s handling of MSG_SPLICE_PAGES\"), the negative\ncopy value caused -EINVAL to be returned. That later commit allowed\nMSG_SPLICE_PAGES to proceed in this case, making the corruption\ntriggerable.\n\nThe non-paged branch sets alloclen to fraglen, which already accounts\nfor fraggap because datalen does. Bring the paged branch in line by\nadding fraggap to alloclen and subtracting it from pagedlen.\n\nAfter this adjustment, copy no longer collapses to -fraggap on the\npaged path, so remove the stale comment describing that old arithmetic.\nSince a negative copy is no longer expected for a valid MSG_SPLICE_PAGES\ncase, remove the MSG_SPLICE_PAGES exception from the negative copy check."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable path is IPv6 transmit skb construction reached by a local process using splice/send operations on an AF_INET6 UDP socket. Received network packets do not enter this path, and a remote peer cannot directly set MSG_SPLICE_PAGES.\nAC:L - No race is required; the attacker controls the UDPv6 socket, MSG_MORE/splice sequence, and send sizes needed to create a nonzero fraggap on the paged allocation path. NETIF_F_SG is common on plausible IPv6 interfaces, so the trigger conditions are not unusually restrictive.\nPR:L - Creating a SOCK_DGRAM IPv6 UDP socket and using splice into it requires only an unprivileged local user. The CAP_NET_RAW check in inet6_create applies to SOCK_RAW, not this UDP datagram path.\nUI:N - The attacker directly invokes the local syscalls and socket operations needed to trigger the bug. No victim user action is required.\nS:U - The corruption occurs within the kernel networking stack and impacts the same kernel security authority. It is not a VM escape, IOMMU/DMA bypass, or cross-scope boundary violation.\nC:H - The bug is an out-of-bounds write into skb_shared_info, which contains fragment metadata and pointers used later by networking code. Such attacker-controlled kernel memory corruption can plausibly be leveraged for information disclosure, so confidentiality is High.\nI:H - The fraggap bytes come from attacker-controlled skb data and are copied past skb->end into skb_shared_info. This is an out-of-bounds write to kernel metadata and is scored as High integrity impact.\nA:H - Corrupting skb_shared_info can readily crash or panic the kernel during skb handling, checksum, transmit, or cleanup. The vulnerability is therefore a High availability impact."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv6/ip6_output.c"], "versions": [{"version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "lessThan": "14200d435af9a9eeb444f529fc2f689a236b7962", "status": "affected", "versionType": "git"}, {"version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "lessThan": "65fb14cbebb0cd0eff903a22d33537ddc8b95769", "status": "affected", "versionType": "git"}, {"version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "lessThan": "46f201f8b4c39633a1fa3dc12459f506d470993d", "status": "affected", "versionType": "git"}, {"version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "lessThan": "6374fb9edf72c67a118a2c214a0dddd04c921e0a", "status": "affected", "versionType": "git"}, {"version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "lessThan": "e9eacf19281ea2498b36291b56c9606118c2d74e", "status": "affected", "versionType": "git"}, {"version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "lessThan": "736b380e28d0480c7bc3e022f1950f31fe53a7c5", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv6/ip6_output.c"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.177", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.144", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.95", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.38", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.3", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.1.177"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.6.144"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12.95"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.18.38"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.1.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/14200d435af9a9eeb444f529fc2f689a236b7962"}, {"url": "https://git.kernel.org/stable/c/65fb14cbebb0cd0eff903a22d33537ddc8b95769"}, {"url": "https://git.kernel.org/stable/c/46f201f8b4c39633a1fa3dc12459f506d470993d"}, {"url": "https://git.kernel.org/stable/c/6374fb9edf72c67a118a2c214a0dddd04c921e0a"}, {"url": "https://git.kernel.org/stable/c/e9eacf19281ea2498b36291b56c9606118c2d74e"}, {"url": "https://git.kernel.org/stable/c/736b380e28d0480c7bc3e022f1950f31fe53a7c5"}], "title": "ipv6: account for fraggap on the paged allocation path", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-122", "lang": "en", "description": "CWE-122 Heap-based Buffer Overflow"}]}], "references": [{"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-53362", "tags": ["government-resource"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-28T03:55:26.491246Z", "id": "CVE-2026-53362", "options": [{"Exploitation": "active"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}, {"other": {"type": "kev", "content": {"dateAdded": "2026-08-27", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-53362"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-28T16:52:44.062Z"}}, {"x_adpType": "supplier", "providerMetadata": {"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-10-15T01:23:25.441Z"}, "affected": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [{"status": "affected", "version": "0", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}], "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}]}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-53362", "role": "CISA Coordinator", "options": [{"Exploitation": "active"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-08-28T03:55:26.491246Z"}}}, {"other": {"type": "kev", "content": {"dateAdded": "2026-08-27", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-53362"}}}], "references": [{"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-53362", "tags": ["government-resource"]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-122", "description": "CWE-122 Heap-based Buffer Overflow"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-27T13:41:53.847Z"}}], "cna": {"title": "ipv6: account for fraggap on the paged allocation path", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable path is IPv6 transmit skb construction reached by a local process using splice/send operations on an AF_INET6 UDP socket. Received network packets do not enter this path, and a remote peer cannot directly set MSG_SPLICE_PAGES.\nAC:L - No race is required; the attacker controls the UDPv6 socket, MSG_MORE/splice sequence, and send sizes needed to create a nonzero fraggap on the paged allocation path. NETIF_F_SG is common on plausible IPv6 interfaces, so the trigger conditions are not unusually restrictive.\nPR:L - Creating a SOCK_DGRAM IPv6 UDP socket and using splice into it requires only an unprivileged local user. The CAP_NET_RAW check in inet6_create applies to SOCK_RAW, not this UDP datagram path.\nUI:N - The attacker directly invokes the local syscalls and socket operations needed to trigger the bug. No victim user action is required.\nS:U - The corruption occurs within the kernel networking stack and impacts the same kernel security authority. It is not a VM escape, IOMMU/DMA bypass, or cross-scope boundary violation.\nC:H - The bug is an out-of-bounds write into skb_shared_info, which contains fragment metadata and pointers used later by networking code. Such attacker-controlled kernel memory corruption can plausibly be leveraged for information disclosure, so confidentiality is High.\nI:H - The fraggap bytes come from attacker-controlled skb data and are copied past skb->end into skb_shared_info. This is an out-of-bounds write to kernel metadata and is scored as High integrity impact.\nA:H - Corrupting skb_shared_info can readily crash or panic the kernel during skb handling, checksum, transmit, or cleanup. The vulnerability is therefore a High availability impact."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "lessThan": "14200d435af9a9eeb444f529fc2f689a236b7962", "versionType": "git"}, {"status": "affected", "version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "lessThan": "65fb14cbebb0cd0eff903a22d33537ddc8b95769", "versionType": "git"}, {"status": "affected", "version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "lessThan": "46f201f8b4c39633a1fa3dc12459f506d470993d", "versionType": "git"}, {"status": "affected", "version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "lessThan": "6374fb9edf72c67a118a2c214a0dddd04c921e0a", "versionType": "git"}, {"status": "affected", "version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "lessThan": "e9eacf19281ea2498b36291b56c9606118c2d74e", "versionType": "git"}, {"status": "affected", "version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "lessThan": "736b380e28d0480c7bc3e022f1950f31fe53a7c5", "versionType": "git"}], "programFiles": ["net/ipv6/ip6_output.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"status": "unaffected", "version": "0", "lessThan": "6.0", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.177", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.144", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.95", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.38", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.3", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/ipv6/ip6_output.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/14200d435af9a9eeb444f529fc2f689a236b7962"}, {"url": "https://git.kernel.org/stable/c/65fb14cbebb0cd0eff903a22d33537ddc8b95769"}, {"url": "https://git.kernel.org/stable/c/46f201f8b4c39633a1fa3dc12459f506d470993d"}, {"url": "https://git.kernel.org/stable/c/6374fb9edf72c67a118a2c214a0dddd04c921e0a"}, {"url": "https://git.kernel.org/stable/c/e9eacf19281ea2498b36291b56c9606118c2d74e"}, {"url": "https://git.kernel.org/stable/c/736b380e28d0480c7bc3e022f1950f31fe53a7c5"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: account for fraggap on the paged allocation path\n\nIn __ip6_append_data(), when the paged-allocation branch is taken\n(MSG_MORE / NETIF_F_SG / large fraglen), alloclen and pagedlen are\ncomputed as\n\n\talloclen = fragheaderlen + transhdrlen;\n\tpagedlen = datalen - transhdrlen;\n\ndatalen already includes fraggap (datalen = length + fraggap). When\nfraggap is non-zero, this is not the first skb and transhdrlen is zero.\nThe fraggap bytes carried over from the previous skb are copied just past\nthe fragment headers in the new skb's linear area. The linear area is\ntherefore undersized by fraggap bytes while pagedlen is overstated by the\nsame amount, and the copy writes past skb->end into the trailing\nskb_shared_info.\n\nAn unprivileged user can trigger this via a UDPv6 socket using\nMSG_MORE together with MSG_SPLICE_PAGES.\n\nThe bad accounting was introduced by commit 773ba4fe9104 (\"ipv6:\navoid partial copy for zc\"). Before commit ce650a166335 (\"udp6: Fix\n__ip6_append_data()'s handling of MSG_SPLICE_PAGES\"), the negative\ncopy value caused -EINVAL to be returned. That later commit allowed\nMSG_SPLICE_PAGES to proceed in this case, making the corruption\ntriggerable.\n\nThe non-paged branch sets alloclen to fraglen, which already accounts\nfor fraggap because datalen does. Bring the paged branch in line by\nadding fraggap to alloclen and subtracting it from pagedlen.\n\nAfter this adjustment, copy no longer collapses to -fraggap on the\npaged path, so remove the stale comment describing that old arithmetic.\nSince a negative copy is no longer expected for a valid MSG_SPLICE_PAGES\ncase, remove the MSG_SPLICE_PAGES exception from the negative copy check."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.177", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.144", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.95", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.38", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.3", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "6.0"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:50:29.351Z"}}}, "cveMetadata": {"cveId": "CVE-2026-53362", "state": "PUBLISHED", "dateUpdated": "2026-08-28T16:52:44.062Z", "dateReserved": "2026-06-09T07:44:35.400Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-07-04T11:56:35.864Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ipv6/ip6_output.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "14200d435af9a9eeb444f529fc2f689a236b7962", "status": "affected", "version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "versionType": "git"}, {"lessThan": "65fb14cbebb0cd0eff903a22d33537ddc8b95769", "status": "affected", "version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "versionType": "git"}, {"lessThan": "46f201f8b4c39633a1fa3dc12459f506d470993d", "status": "affected", "version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "versionType": "git"}, {"lessThan": "6374fb9edf72c67a118a2c214a0dddd04c921e0a", "status": "affected", "version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "versionType": "git"}, {"lessThan": "e9eacf19281ea2498b36291b56c9606118c2d74e", "status": "affected", "version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "versionType": "git"}, {"lessThan": "736b380e28d0480c7bc3e022f1950f31fe53a7c5", "status": "affected", "version": "773ba4fe9104a64a54d1c00f0fb6ffb95def2b03", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/ipv6/ip6_output.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"lessThan": "6.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.177", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.144", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.95", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.38", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.3", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"affectedData": [{"defaultStatus": "unknown", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "cisaActionDue": "2026-08-30", "cisaExploitAdd": "2026-08-27", "cisaRequiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA\u2019s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA\u2019s \u201cForensics Triage Requirements\u201d (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.", "cisaVulnerabilityName": "Linux Kernel Unspecified Vulnerability", "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E1C3142A-8469-4087-A10A-726FF6961047", "versionEndExcluding": "6.1.177", "versionStartIncluding": "6.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C8AD3BC8-C843-423C-B9DB-CB52F67F578E", "versionEndExcluding": "6.6.144", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4E206B86-E0E3-4394-A93F-39F2D50A8AA8", "versionEndExcluding": "6.12.95", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FA591B28-5D62-449E-BDBE-3C9391BF070A", "versionEndExcluding": "6.18.38", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9526B150-E2B3-4C6F-8AE5-1AF92B75AD9E", "versionEndExcluding": "7.1.3", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:siemens:simatic_s7-1500_tm_mfp_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "7F6C0262-1527-4F55-8BDE-973F59FE7E1B", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:siemens:simatic_s7-1500_tm_mfp:-:*:*:*:*:*:*:*", "matchCriteriaId": "754051AB-27D3-41CA-B2C8-79BAD48C8750", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: account for fraggap on the paged allocation path\n\nIn __ip6_append_data(), when the paged-allocation branch is taken\n(MSG_MORE / NETIF_F_SG / large fraglen), alloclen and pagedlen are\ncomputed as\n\n\talloclen = fragheaderlen + transhdrlen;\n\tpagedlen = datalen - transhdrlen;\n\ndatalen already includes fraggap (datalen = length + fraggap). When\nfraggap is non-zero, this is not the first skb and transhdrlen is zero.\nThe fraggap bytes carried over from the previous skb are copied just past\nthe fragment headers in the new skb's linear area. The linear area is\ntherefore undersized by fraggap bytes while pagedlen is overstated by the\nsame amount, and the copy writes past skb->end into the trailing\nskb_shared_info.\n\nAn unprivileged user can trigger this via a UDPv6 socket using\nMSG_MORE together with MSG_SPLICE_PAGES.\n\nThe bad accounting was introduced by commit 773ba4fe9104 (\"ipv6:\navoid partial copy for zc\"). Before commit ce650a166335 (\"udp6: Fix\n__ip6_append_data()'s handling of MSG_SPLICE_PAGES\"), the negative\ncopy value caused -EINVAL to be returned. That later commit allowed\nMSG_SPLICE_PAGES to proceed in this case, making the corruption\ntriggerable.\n\nThe non-paged branch sets alloclen to fraglen, which already accounts\nfor fraggap because datalen does. Bring the paged branch in line by\nadding fraggap to alloclen and subtracting it from pagedlen.\n\nAfter this adjustment, copy no longer collapses to -fraggap on the\npaged path, so remove the stale comment describing that old arithmetic.\nSince a negative copy is no longer expected for a valid MSG_SPLICE_PAGES\ncase, remove the MSG_SPLICE_PAGES exception from the negative copy check."}], "id": "CVE-2026-53362", "lastModified": "2026-10-15T13:46:55.187", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-53362", "options": [{"exploitation": "active"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-28T03:55:26.491246Z", "version": "2.0.3"}}]}, "published": "2026-07-04T12:17:02.113", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/14200d435af9a9eeb444f529fc2f689a236b7962"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/46f201f8b4c39633a1fa3dc12459f506d470993d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6374fb9edf72c67a118a2c214a0dddd04c921e0a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/65fb14cbebb0cd0eff903a22d33537ddc8b95769"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/736b380e28d0480c7bc3e022f1950f31fe53a7c5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e9eacf19281ea2498b36291b56c9606118c2d74e"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "tags": ["Third Party Advisory"], "url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["US Government Resource"], "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-53362"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-122"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: ipv6: account for fraggap on the paged allocation path", "id": "2497031", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2497031"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-131", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nipv6: account for fraggap on the paged allocation path\nIn __ip6_append_data(), when the paged-allocation branch is taken\n(MSG_MORE / NETIF_F_SG / large fraglen), alloclen and pagedlen are\ncomputed as\nalloclen = fragheaderlen + transhdrlen;\npagedlen = datalen - transhdrlen;\ndatalen already includes fraggap (datalen = length + fraggap). When\nfraggap is non-zero, this is not the first skb and transhdrlen is zero.\nThe fraggap bytes carried over from the previous skb are copied just past\nthe fragment headers in the new skb's linear area. The linear area is\ntherefore undersized by fraggap bytes while pagedlen is overstated by the\nsame amount, and the copy writes past skb->end into the trailing\nskb_shared_info.\nAn unprivileged user can trigger this via a UDPv6 socket using\nMSG_MORE together with MSG_SPLICE_PAGES.\nThe bad accounting was introduced by commit 773ba4fe9104 (\"ipv6:\navoid partial copy for zc\"). Before commit ce650a166335 (\"udp6: Fix\n__ip6_append_data()'s handling of MSG_SPLICE_PAGES\"), the negative\ncopy value caused -EINVAL to be returned. That later commit allowed\nMSG_SPLICE_PAGES to proceed in this case, making the corruption\ntriggerable.\nThe non-paged branch sets alloclen to fraglen, which already accounts\nfor fraggap because datalen does. Bring the paged branch in line by\nadding fraggap to alloclen and subtracting it from pagedlen.\nAfter this adjustment, copy no longer collapses to -fraggap on the\npaged path, so remove the stale comment describing that old arithmetic.\nSince a negative copy is no longer expected for a valid MSG_SPLICE_PAGES\ncase, remove the MSG_SPLICE_PAGES exception from the negative copy check.", "A flaw was found in the Linux kernel's IPv6 networking subsystem. Incorrect accounting for fragment gaps (fraggap) on the paged allocation path in the __ip6_append_data() function can lead to memory corruption. An unprivileged user can exploit this vulnerability by using a UDPv6 socket with specific message flags, potentially causing system instability or other unforeseen impacts."], "name": "CVE-2026-53362", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53362\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53362\nhttps://lore.kernel.org/linux-cve-announce/2026070450-CVE-2026-53362-fe9b@gregkh/T"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[773ba4fe9104a64a54d1c00f0fb6ffb95def2b03,14200d435af9a9eeb444f529fc2f689a236b7962)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[773ba4fe9104a64a54d1c00f0fb6ffb95def2b03,65fb14cbebb0cd0eff903a22d33537ddc8b95769)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[773ba4fe9104a64a54d1c00f0fb6ffb95def2b03,46f201f8b4c39633a1fa3dc12459f506d470993d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[773ba4fe9104a64a54d1c00f0fb6ffb95def2b03,6374fb9edf72c67a118a2c214a0dddd04c921e0a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[773ba4fe9104a64a54d1c00f0fb6ffb95def2b03,e9eacf19281ea2498b36291b56c9606118c2d74e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[773ba4fe9104a64a54d1c00f0fb6ffb95def2b03,736b380e28d0480c7bc3e022f1950f31fe53a7c5)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.177,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.144,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.95,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.38,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.3,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-04T15:45:02.962466+00:00", "updated": "2026-08-28T20:30:08.463066+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}