CVE-2026-72296

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The caller then passes the decapsulated packet to\neth_type_trans(), which expects the inner Ethernet header to be\naccessible from the linear data area.\n\nWith a malformed IFE frame, the inner Ethernet header may still be\nshorter than ETH_HLEN in the linear area, which can lead to a crash in\nthe original code.\n\nFix this by extending the pull check in ife_decode() so that the inner\nEthernet header is also guaranteed to be pullable before returning."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 9.1, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The flaw is hit on the ingress packet receive path (__netif_receive_skb_core\u2192sch_handle_ingress\u2192tc_run\u2192tcf_ife_act\u2192ife_decode) when a remote peer sends a malformed IFE-encapsulated Ethernet frame to a netdev with clsact/ingress IFE decode, as in SDN/NFV/ForCES edge nodes.\nAC:L - Once ingress IFE decode is present, the attacker fully controls the crafted frame (metalen, metadata size, and skb layout) to leave the inner Ethernet header non-linear or shorter than ETH_HLEN, deterministically reaching eth_type_trans() without races or uncontrollable memory layout.\nPR:N - Remote exploitation needs no credentials or capabilities on the victim\u2014only delivery of a malformed frame to an interface already configured with IFE decode; CAP_NET_ADMIN is an operator deployment prerequisite, not attacker privilege (same model as pre-configured nftables offload bugs).\nUI:N - No victim user action is required beyond normal network delivery of attacker-crafted IFE traffic; exploitation does not depend on mounting, opening files, or administrator interaction at attack time.\nS:U - Impact is confined to kernel packet-processing memory within the same kernel security authority; this is not a VM escape, IOMMU bypass, or cross-namespace scope change.\nC:H - eth_type_trans() reads the inner struct ethhdr (h_dest/h_proto) via eth_skb_pull_mac()/eth_skb_pkt_type() without ensuring ETH_HLEN bytes are linear, causing an out-of-bounds kernel read that can disclose adjacent skb/page memory beyond a few bytes.\nI:N - The defect is a missing pskb_may_pull() bounds check leading to out-of-bounds reads and crash; there is no write, UAF, or demonstrated arbitrary modification or control-flow hijack primitive.\nA:H - The fix commit states malformed IFE frames can crash the kernel; accessing a non-linear or undersized inner Ethernet header in eth_type_trans() can trigger KASAN faults, oops, or panic on the softirq receive path."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ife/ife.c"], "versions": [{"version": "ef6980b6becb1afd9d82a4f043749a10ae81bf14", "lessThan": "70013f9163bef7fbd9fa62f81cf91b2a7ba66163", "status": "affected", "versionType": "git"}, 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"unaffected", "versionType": "semver"}, {"version": "7.1.5", "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": "4.6", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": 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{"url": "https://git.kernel.org/stable/c/5526d1997aea6c9bd865ca4d4894b52e799d735c"}, {"url": "https://git.kernel.org/stable/c/b69ad768cd4a2ef4e07c18492ae85438ed17c7cb"}, {"url": "https://git.kernel.org/stable/c/9406f6012b7343661efb516a11c62d4db2b62f75"}], "title": "net: ife: require ETH_HLEN to be pullable in ife_decode()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-72296", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T18:45:54.972693Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:55:15.361Z"}}]}}

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CAP_NET_ADMIN is an operator deployment prerequisite, not attacker privilege (same model as pre-configured nftables offload bugs).\nUI:N - No victim user action is required beyond normal network delivery of attacker-crafted IFE traffic; exploitation does not depend on mounting, opening files, or administrator interaction at attack time.\nS:U - Impact is confined to kernel packet-processing memory within the same kernel security authority; this is not a VM escape, IOMMU bypass, or cross-namespace scope change.\nC:H - eth_type_trans() reads the inner struct ethhdr (h_dest/h_proto) via eth_skb_pull_mac()/eth_skb_pkt_type() without ensuring ETH_HLEN bytes are linear, causing an out-of-bounds kernel read that can disclose adjacent skb/page memory beyond a few bytes.\nI:N - The defect is a missing pskb_may_pull() bounds check leading to out-of-bounds reads and crash; there is no write, UAF, or demonstrated arbitrary modification or control-flow hijack primitive.\nA:H - The fix commit states malformed IFE frames can crash the kernel; accessing a non-linear or undersized inner Ethernet header in eth_type_trans() can trigger KASAN faults, oops, or panic on the softirq receive path."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "ef6980b6becb1afd9d82a4f043749a10ae81bf14", "lessThan": "70013f9163bef7fbd9fa62f81cf91b2a7ba66163", "versionType": "git"}, {"status": "affected", "version": "ef6980b6becb1afd9d82a4f043749a10ae81bf14", "lessThan": "be272e159dfe1207b67332ad6e17adcf59b4ea4b", "versionType": "git"}, {"status": "affected", "version": "ef6980b6becb1afd9d82a4f043749a10ae81bf14", "lessThan": "8c8818e52fddb247ff3214622401a4de6ff8482e", "versionType": "git"}, {"status": "affected", "version": "ef6980b6becb1afd9d82a4f043749a10ae81bf14", "lessThan": "9433578bff9c100c466a6354574892e55293cb8f", "versionType": "git"}, {"status": "affected", "version": "ef6980b6becb1afd9d82a4f043749a10ae81bf14", "lessThan": "1cb42ec10294a55380e52e674b3df2b962648242", "versionType": "git"}, {"status": "affected", "version": "ef6980b6becb1afd9d82a4f043749a10ae81bf14", "lessThan": "5526d1997aea6c9bd865ca4d4894b52e799d735c", "versionType": "git"}, {"status": "affected", "version": "ef6980b6becb1afd9d82a4f043749a10ae81bf14", "lessThan": "b69ad768cd4a2ef4e07c18492ae85438ed17c7cb", "versionType": "git"}, {"status": "affected", "version": "ef6980b6becb1afd9d82a4f043749a10ae81bf14", "lessThan": "9406f6012b7343661efb516a11c62d4db2b62f75", "versionType": "git"}], "programFiles": ["net/ife/ife.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.6"}, {"status": "unaffected", "version": "0", "lessThan": "4.6", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.261", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.212", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.178", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/ife/ife.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/70013f9163bef7fbd9fa62f81cf91b2a7ba66163"}, {"url": "https://git.kernel.org/stable/c/be272e159dfe1207b67332ad6e17adcf59b4ea4b"}, {"url": "https://git.kernel.org/stable/c/8c8818e52fddb247ff3214622401a4de6ff8482e"}, {"url": "https://git.kernel.org/stable/c/9433578bff9c100c466a6354574892e55293cb8f"}, {"url": "https://git.kernel.org/stable/c/1cb42ec10294a55380e52e674b3df2b962648242"}, {"url": "https://git.kernel.org/stable/c/5526d1997aea6c9bd865ca4d4894b52e799d735c"}, {"url": "https://git.kernel.org/stable/c/b69ad768cd4a2ef4e07c18492ae85438ed17c7cb"}, {"url": "https://git.kernel.org/stable/c/9406f6012b7343661efb516a11c62d4db2b62f75"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ife: require ETH_HLEN to be pullable in ife_decode()\n\nife decode may return after making only the outer IFE header and\nmetadata pullable. The caller then passes the decapsulated packet to\neth_type_trans(), which expects the inner Ethernet header to be\naccessible from the linear data area.\n\nWith a malformed IFE frame, the inner Ethernet header may still be\nshorter than ETH_HLEN in the linear area, which can lead to a crash in\nthe original code.\n\nFix this by extending the pull check in ife_decode() so that the inner\nEthernet header is also guaranteed to be pullable before returning."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.261", "versionStartIncluding": "4.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.212", "versionStartIncluding": "4.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.178", "versionStartIncluding": "4.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.145", "versionStartIncluding": "4.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.97", "versionStartIncluding": "4.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.40", "versionStartIncluding": "4.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.5", "versionStartIncluding": "4.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "4.6"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:42:29.172Z"}}}, "cveMetadata": {"cveId": "CVE-2026-72296", "state": "PUBLISHED", "dateUpdated": "2026-10-16T18:55:15.361Z", "dateReserved": "2026-08-09T03:40:39.917Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-15T05:55:17.250Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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The caller then passes the decapsulated packet to\neth_type_trans(), which expects the inner Ethernet header to be\naccessible from the linear data area.\n\nWith a malformed IFE frame, the inner Ethernet header may still be\nshorter than ETH_HLEN in the linear area, which can lead to a crash in\nthe original code.\n\nFix this by extending the pull check in ife_decode() so that the inner\nEthernet header is also guaranteed to be pullable before returning."}], "id": "CVE-2026-72296", "lastModified": "2026-10-16T19:17:19.437", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72296", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T18:45:54.972693Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:22:02.160", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1cb42ec10294a55380e52e674b3df2b962648242"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5526d1997aea6c9bd865ca4d4894b52e799d735c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/70013f9163bef7fbd9fa62f81cf91b2a7ba66163"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8c8818e52fddb247ff3214622401a4de6ff8482e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9406f6012b7343661efb516a11c62d4db2b62f75"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9433578bff9c100c466a6354574892e55293cb8f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b69ad768cd4a2ef4e07c18492ae85438ed17c7cb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/be272e159dfe1207b67332ad6e17adcf59b4ea4b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net: ife: require ETH_HLEN to be pullable in ife_decode()", "id": "2516243", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516243"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in the Linux kernel's In-band Flow Engine (IFE) component. A remote attacker could send a specially crafted IFE frame with a malformed inner Ethernet header. This improper handling of the packet structure could lead to a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-72296", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72296\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72296\nhttps://lore.kernel.org/linux-cve-announce/2026081501-CVE-2026-72296-be28@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ef6980b6becb1afd9d82a4f043749a10ae81bf14,70013f9163bef7fbd9fa62f81cf91b2a7ba66163)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ef6980b6becb1afd9d82a4f043749a10ae81bf14,be272e159dfe1207b67332ad6e17adcf59b4ea4b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ef6980b6becb1afd9d82a4f043749a10ae81bf14,8c8818e52fddb247ff3214622401a4de6ff8482e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ef6980b6becb1afd9d82a4f043749a10ae81bf14,9433578bff9c100c466a6354574892e55293cb8f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ef6980b6becb1afd9d82a4f043749a10ae81bf14,1cb42ec10294a55380e52e674b3df2b962648242)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ef6980b6becb1afd9d82a4f043749a10ae81bf14,5526d1997aea6c9bd865ca4d4894b52e799d735c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ef6980b6becb1afd9d82a4f043749a10ae81bf14,b69ad768cd4a2ef4e07c18492ae85438ed17c7cb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ef6980b6becb1afd9d82a4f043749a10ae81bf14,9406f6012b7343661efb516a11c62d4db2b62f75)"}}], "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": "4.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.261,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"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": "2026-08-15T10:45:06.978436+00:00", "updated": "2026-08-17T20:15:06.909556+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-125", "CWE-122"]}