{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-72296", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.917Z", "datePublished": "2026-08-15T05:55:17.250Z", "dateUpdated": "2026-08-17T05:42:29.172Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:42:29.172Z" }, "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." } ], "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→sch_handle_ingress→tc_run→tcf_ife_act→ife_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—only 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" }, { "version": "ef6980b6becb1afd9d82a4f043749a10ae81bf14", "lessThan": "be272e159dfe1207b67332ad6e17adcf59b4ea4b", "status": "affected", "versionType": "git" }, { "version": "ef6980b6becb1afd9d82a4f043749a10ae81bf14", "lessThan": "8c8818e52fddb247ff3214622401a4de6ff8482e", "status": "affected", "versionType": "git" }, { "version": "ef6980b6becb1afd9d82a4f043749a10ae81bf14", "lessThan": "9433578bff9c100c466a6354574892e55293cb8f", "status": "affected", "versionType": "git" }, { "version": "ef6980b6becb1afd9d82a4f043749a10ae81bf14", "lessThan": "1cb42ec10294a55380e52e674b3df2b962648242", "status": "affected", "versionType": "git" }, { "version": "ef6980b6becb1afd9d82a4f043749a10ae81bf14", "lessThan": "5526d1997aea6c9bd865ca4d4894b52e799d735c", "status": "affected", "versionType": "git" }, { "version": "ef6980b6becb1afd9d82a4f043749a10ae81bf14", "lessThan": "b69ad768cd4a2ef4e07c18492ae85438ed17c7cb", "status": "affected", "versionType": "git" }, { "version": "ef6980b6becb1afd9d82a4f043749a10ae81bf14", "lessThan": "9406f6012b7343661efb516a11c62d4db2b62f75", "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/ife/ife.c" ], "versions": [ { "version": "4.6", "status": "affected" }, { "version": "0", "lessThan": "4.6", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "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": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "7.2" } ] } ] } ], "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" } ], "title": "net: ife: require ETH_HLEN to be pullable in ife_decode()", "x_generator": { "engine": "bippy-1.2.0" } } } }