CVE-2026-63912

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63912", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.020Z", "datePublished": "2026-07-19T14:55:17.188Z", "dateUpdated": "2026-10-19T20:17:55.311Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:37:06.161Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: esp: restore combined single-frag length gate\n\nThe ESP out-of-place fast path appends the trailer in esp_output_head()\nbefore esp_output_tail() allocates the destination page frag. The\nhead-side gate currently checks skb->data_len and tailen separately, but\nthe tail code allocates a single destination frag from the combined\npost-trailer skb->data_len.\n\nReject the page-frag fast path when the combined aligned length exceeds a\npage. Otherwise skb_page_frag_refill() may fall back to a single page while\nthe destination sg still spans the combined skb->data_len.\n\nRestore this combined-length page gate for both IPv4 and IPv6."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The bug is in the ESP outbound encryption path reached when IPsec-protected traffic is sent through xfrm (e.g., from an internet-facing VPN/tunnel gateway encrypting responses or forwarded flows to a remote peer). A network peer can influence outbound skb fragment sizes to hit the vulnerable fast path without local shell access.\nAC:L - An attacker can reliably craft payload sizes so ALIGN(skb->data_len) and ALIGN(tailen) each pass the broken per-field PAGE_SIZE gate while their combined aligned length exceeds PAGE_SIZE, repeatedly probing until the out-of-place page-frag path is taken.\nPR:N - Exploitation does not require configuring xfrm or host admin rights; it only needs the target to already run ESP and the attacker to send traffic that is encrypted on output (e.g., as a remote VPN/site-to-site peer), which is network-layer access rather than local OS privilege.\nUI:N - Triggering the vulnerable ESP output path requires only attacker-controlled network traffic and does not depend on any victim user action such as mounting a filesystem or opening a file.\nS:U - Impact is confined to kernel memory corruption and privilege escalation within the same kernel security authority, not a cross-boundary escape such as guest-to-host VM breakout or IOMMU bypass.\nC:H - The flaw is a heap out-of-bounds write during AEAD encryption over an undersized page frag; such memory corruption can expose adjacent kernel objects and be leveraged for arbitrary memory disclosure, not merely a bounded leak.\nI:H - Writing past the allocated page-frag buffer corrupts adjacent heap memory and can be developed into arbitrary write or control-flow hijack primitives, matching kernel guidance for out-of-bounds writes.\nA:H - Corrupting kernel heap memory during crypto output can cause immediate kernel oops/panic or persistent instability, and repeated triggering can deny service on VPN gateways and other IPsec endpoints."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/esp4.c", "net/ipv6/esp6.c"], "versions": [{"version": "c075c3ea031757f8ea2d34567565b61a868c08d5", "lessThan": "566295735530ee513326049b0540f32ec050bf2e", "status": "affected", "versionType": "git"}, {"version": "a583f2f3c8788bffd7fd7baeb76bd6d80543d7ea", "lessThan": "5d7ab86e2b6bc23054616bf6ac562013bf60af8c", "status": "affected", "versionType": "git"}, {"version": "5bd8baab087dff657e05387aee802e70304cc813", "lessThan": "36519e3d941fc99d3b52c134dbaf311f987a4708", "status": "affected", "versionType": "git"}, {"version": "5bd8baab087dff657e05387aee802e70304cc813", "lessThan": "322e48187e0245ab2fff6fec2220b0cae677dbec", "status": "affected", "versionType": "git"}, {"version": "5bd8baab087dff657e05387aee802e70304cc813", "lessThan": "b84091ceddc9f133229dceab3ccc930bf27f9cba", "status": "affected", "versionType": "git"}, {"version": "5bd8baab087dff657e05387aee802e70304cc813", "lessThan": "c093468aea8277f77272a4f199b2e15e19cabb59", "status": "affected", "versionType": "git"}, {"version": "5bd8baab087dff657e05387aee802e70304cc813", "lessThan": "65f3b3fc2347b89fe21db1e92c7681368415f095", "status": "affected", "versionType": "git"}, {"version": "5bd8baab087dff657e05387aee802e70304cc813", "lessThan": "dfa0d7b0ff1eb6b2c416b8fdb9b4f2cefba57a40", "status": "affected", "versionType": "git"}, {"version": "2c66b0c95bb0aa7652ba1eba293d0d5993b35a38", "status": "affected", "versionType": "git"}, {"version": "ef6f83df1209a7d9bd1c605a62457d4c00f9179e", "status": "affected", "versionType": "git"}, {"version": "3defefd22ad5fbbe639b6157fb7e6311b2bf333d", "status": "affected", "versionType": "git"}, {"version": "b657030870bb5351c5b1e84d4e9f186da6ca0496", "status": "affected", "versionType": "git"}, {"version": "5.10.113", "lessThan": "5.10.259", "status": "affected", "versionType": "semver"}, {"version": "5.15.36", "lessThan": "5.15.210", "status": "affected", "versionType": "semver"}, {"version": "4.14.288", "lessThan": "4.15", "status": "affected", "versionType": "semver"}, {"version": "4.19.252", "lessThan": "4.20", "status": "affected", "versionType": "semver"}, {"version": "5.4.205", "lessThan": "5.5", "status": "affected", "versionType": "semver"}, {"version": "5.17.5", "lessThan": "5.18", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/esp4.c", "net/ipv6/esp6.c"], "versions": [{"version": "5.18", "status": "affected"}, {"version": "0", "lessThan": "5.18", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.12", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "5.10.113", "versionEndExcluding": "5.10.259"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.36", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.288"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.252"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.205"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17.5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/566295735530ee513326049b0540f32ec050bf2e"}, {"url": "https://git.kernel.org/stable/c/5d7ab86e2b6bc23054616bf6ac562013bf60af8c"}, {"url": "https://git.kernel.org/stable/c/36519e3d941fc99d3b52c134dbaf311f987a4708"}, {"url": "https://git.kernel.org/stable/c/322e48187e0245ab2fff6fec2220b0cae677dbec"}, {"url": "https://git.kernel.org/stable/c/b84091ceddc9f133229dceab3ccc930bf27f9cba"}, {"url": "https://git.kernel.org/stable/c/c093468aea8277f77272a4f199b2e15e19cabb59"}, {"url": "https://git.kernel.org/stable/c/65f3b3fc2347b89fe21db1e92c7681368415f095"}, {"url": "https://git.kernel.org/stable/c/dfa0d7b0ff1eb6b2c416b8fdb9b4f2cefba57a40"}], "title": "xfrm: esp: restore combined single-frag length gate", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-63912", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:33:08.898705Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-125", "description": "CWE-125 Out-of-bounds Read"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T20:17:55.311Z"}}]}}

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A network peer can influence outbound skb fragment sizes to hit the vulnerable fast path without local shell access.\nAC:L - An attacker can reliably craft payload sizes so ALIGN(skb->data_len) and ALIGN(tailen) each pass the broken per-field PAGE_SIZE gate while their combined aligned length exceeds PAGE_SIZE, repeatedly probing until the out-of-place page-frag path is taken.\nPR:N - Exploitation does not require configuring xfrm or host admin rights; it only needs the target to already run ESP and the attacker to send traffic that is encrypted on output (e.g., as a remote VPN/site-to-site peer), which is network-layer access rather than local OS privilege.\nUI:N - Triggering the vulnerable ESP output path requires only attacker-controlled network traffic and does not depend on any victim user action such as mounting a filesystem or opening a file.\nS:U - Impact is confined to kernel memory corruption and privilege escalation within the same kernel security authority, not a cross-boundary escape such as guest-to-host VM breakout or IOMMU bypass.\nC:H - The flaw is a heap out-of-bounds write during AEAD encryption over an undersized page frag; such memory corruption can expose adjacent kernel objects and be leveraged for arbitrary memory disclosure, not merely a bounded leak.\nI:H - Writing past the allocated page-frag buffer corrupts adjacent heap memory and can be developed into arbitrary write or control-flow hijack primitives, matching kernel guidance for out-of-bounds writes.\nA:H - Corrupting kernel heap memory during crypto output can cause immediate kernel oops/panic or persistent instability, and repeated triggering can deny service on VPN gateways and other IPsec endpoints."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "c075c3ea031757f8ea2d34567565b61a868c08d5", "lessThan": "566295735530ee513326049b0540f32ec050bf2e", "versionType": "git"}, {"status": "affected", "version": "a583f2f3c8788bffd7fd7baeb76bd6d80543d7ea", "lessThan": "5d7ab86e2b6bc23054616bf6ac562013bf60af8c", "versionType": "git"}, {"status": "affected", "version": "5bd8baab087dff657e05387aee802e70304cc813", "lessThan": "36519e3d941fc99d3b52c134dbaf311f987a4708", "versionType": "git"}, {"status": "affected", "version": "5bd8baab087dff657e05387aee802e70304cc813", "lessThan": "322e48187e0245ab2fff6fec2220b0cae677dbec", "versionType": "git"}, {"status": "affected", "version": "5bd8baab087dff657e05387aee802e70304cc813", "lessThan": "b84091ceddc9f133229dceab3ccc930bf27f9cba", "versionType": "git"}, {"status": "affected", "version": "5bd8baab087dff657e05387aee802e70304cc813", "lessThan": "c093468aea8277f77272a4f199b2e15e19cabb59", "versionType": "git"}, {"status": "affected", "version": "5bd8baab087dff657e05387aee802e70304cc813", "lessThan": "65f3b3fc2347b89fe21db1e92c7681368415f095", "versionType": "git"}, {"status": "affected", "version": "5bd8baab087dff657e05387aee802e70304cc813", "lessThan": "dfa0d7b0ff1eb6b2c416b8fdb9b4f2cefba57a40", "versionType": "git"}, {"status": "affected", "version": "2c66b0c95bb0aa7652ba1eba293d0d5993b35a38", "versionType": "git"}, {"status": "affected", "version": "ef6f83df1209a7d9bd1c605a62457d4c00f9179e", "versionType": "git"}, {"status": "affected", "version": "3defefd22ad5fbbe639b6157fb7e6311b2bf333d", "versionType": "git"}, {"status": "affected", "version": "b657030870bb5351c5b1e84d4e9f186da6ca0496", "versionType": "git"}, {"status": "affected", "version": "5.10.113", "lessThan": "5.10.259", "versionType": "semver"}, {"status": "affected", "version": "5.15.36", "lessThan": "5.15.210", "versionType": "semver"}, {"status": "affected", "version": "4.14.288", "lessThan": "4.15", "versionType": "semver"}, {"status": "affected", "version": "4.19.252", "lessThan": "4.20", "versionType": "semver"}, {"status": "affected", "version": "5.4.205", "lessThan": "5.5", "versionType": "semver"}, {"status": "affected", "version": "5.17.5", "lessThan": "5.18", "versionType": "semver"}], "programFiles": ["net/ipv4/esp4.c", "net/ipv6/esp6.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.18"}, {"status": "unaffected", "version": "0", "lessThan": "5.18", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.259", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.210", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.176", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.143", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.93", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.35", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.12", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/ipv4/esp4.c", "net/ipv6/esp6.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/566295735530ee513326049b0540f32ec050bf2e"}, {"url": "https://git.kernel.org/stable/c/5d7ab86e2b6bc23054616bf6ac562013bf60af8c"}, {"url": "https://git.kernel.org/stable/c/36519e3d941fc99d3b52c134dbaf311f987a4708"}, {"url": "https://git.kernel.org/stable/c/322e48187e0245ab2fff6fec2220b0cae677dbec"}, {"url": "https://git.kernel.org/stable/c/b84091ceddc9f133229dceab3ccc930bf27f9cba"}, {"url": "https://git.kernel.org/stable/c/c093468aea8277f77272a4f199b2e15e19cabb59"}, {"url": "https://git.kernel.org/stable/c/65f3b3fc2347b89fe21db1e92c7681368415f095"}, {"url": "https://git.kernel.org/stable/c/dfa0d7b0ff1eb6b2c416b8fdb9b4f2cefba57a40"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: esp: restore combined single-frag length gate\n\nThe ESP out-of-place fast path appends the trailer in esp_output_head()\nbefore esp_output_tail() allocates the destination page frag. The\nhead-side gate currently checks skb->data_len and tailen separately, but\nthe tail code allocates a single destination frag from the combined\npost-trailer skb->data_len.\n\nReject the page-frag fast path when the combined aligned length exceeds a\npage. Otherwise skb_page_frag_refill() may fall back to a single page while\nthe destination sg still spans the combined skb->data_len.\n\nRestore this combined-length page gate for both IPv4 and IPv6."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.259", "versionStartIncluding": "5.10.113"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.210", "versionStartIncluding": "5.15.36"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.176", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.143", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.93", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.35", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0.12", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.14.288"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.19.252"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.4.205"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.17.5"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:37:06.161Z"}}}, "cveMetadata": {"cveId": "CVE-2026-63912", "state": "PUBLISHED", "dateUpdated": "2026-10-19T20:17:55.311Z", "dateReserved": "2026-07-19T07:54:57.020Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-07-19T14:55:17.188Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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The\nhead-side gate currently checks skb->data_len and tailen separately, but\nthe tail code allocates a single destination frag from the combined\npost-trailer skb->data_len.\n\nReject the page-frag fast path when the combined aligned length exceeds a\npage. Otherwise skb_page_frag_refill() may fall back to a single page while\nthe destination sg still spans the combined skb->data_len.\n\nRestore this combined-length page gate for both IPv4 and IPv6."}], "id": "CVE-2026-63912", "lastModified": "2026-10-30T17:56:10.920", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-63912", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:33:08.898705Z", "version": "2.0.3"}}]}, "published": "2026-07-19T16:17:09.097", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/322e48187e0245ab2fff6fec2220b0cae677dbec"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/36519e3d941fc99d3b52c134dbaf311f987a4708"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/566295735530ee513326049b0540f32ec050bf2e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5d7ab86e2b6bc23054616bf6ac562013bf60af8c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/65f3b3fc2347b89fe21db1e92c7681368415f095"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b84091ceddc9f133229dceab3ccc930bf27f9cba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c093468aea8277f77272a4f199b2e15e19cabb59"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dfa0d7b0ff1eb6b2c416b8fdb9b4f2cefba57a40"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: xfrm: esp: restore combined single-frag length gate", "id": "2502415", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502415"}, "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-770", "details": ["A flaw was found in the Linux kernel's Encapsulating Security Payload (ESP) component. This vulnerability occurs in the ESP out-of-place fast path when handling combined single-fragment lengths. An attacker could potentially trigger a scenario where the system rejects the page-fragment fast path, leading to a denial of service (DoS) condition. This issue affects both IPv4 and IPv6."], "name": "CVE-2026-63912", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "impact": "important", "package_name": "erlang27", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63912\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63912\nhttps://lore.kernel.org/linux-cve-announce/2026071946-CVE-2026-63912-a43c@gregkh/T"], "threat_severity": "Moderate"}

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