{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-27016", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.209Z", "datePublished": "2024-05-01T05:29:57.099Z", "dateUpdated": "2026-08-05T11:28:59.141Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:28:59.141Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: flowtable: validate pppoe header\n\nEnsure there is sufficient room to access the protocol field of the\nPPPoe header. Validate it once before the flowtable lookup, then use a\nhelper function to access protocol field." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - The vulnerable code is the netfilter flowtable NF_NETDEV_INGRESS hook, reached purely by receiving an Ethernet frame with ethertype 0x8864 (ETH_P_PPP_SES); PPPoE session frames are a link-layer encapsulation and are not routable across L3, so the attacker must be on the same L2 segment (ISP access network of a PPPoE CPE, the router LAN, or a bridged VM/tap network).\nAC:L - The attacker simply emits a truncated PPPoE session frame carrying fewer than 8 bytes past the Ethernet header — there is no race, no memory-layout dependency, and no state the attacker cannot create, since tap/virtio, veth, and L2-tunnel decap paths impose no minimum-frame padding and can be triggered repeatedly at will.\nPR:N - No credentials or privileges on the target are needed — the flowtable ingress hook processes every received frame before any authentication, and the nftables flowtable configuration is the victim admin's normal router/offload setup, not an attacker prerequisite.\nUI:N - The out-of-bounds read happens automatically in softirq packet-receive context as soon as the crafted frame arrives on the flowtable-bound interface; no action by any local user or administrator is required.\nS:U - The out-of-bounds read and its consequences are confined to the kernel's own memory and the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:L - The bug reads 2 bytes of adjacent kernel heap memory beyond the packet buffer, but the read is strictly bounded to a fixed offset and the value is only compared against PPP_IP/PPP_IPV6, giving at most a weak fast-path-versus-slow-path oracle rather than a general memory-disclosure primitive.\nI:N - The defect is a read-only over-read; no kernel memory is written, and the misclassified packet's subsequent handling is re-validated by pskb_may_pull() in nf_flow_tuple_ip() before any header mangling occurs.\nA:H - The slab-out-of-bounds read is a KASAN-detectable memory-safety violation that panics debug/hardened kernels and can fault when the skb head abuts an unmapped region, and it is triggerable remotely, repeatedly, and without authentication on every arriving frame." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/net/netfilter/nf_flow_table.h", "net/netfilter/nf_flow_table_inet.c", "net/netfilter/nf_flow_table_ip.c" ], "versions": [ { "version": "72efd585f7144a047f7da63864284764596ccad9", "lessThan": "d06977b9a4109f8738bb276125eb6a0b772bc433", "status": "affected", "versionType": "git" }, { "version": "72efd585f7144a047f7da63864284764596ccad9", "lessThan": "8bf7c76a2a207ca2b4cfda0a279192adf27678d7", "status": "affected", "versionType": "git" }, { "version": "72efd585f7144a047f7da63864284764596ccad9", "lessThan": "a2471d271042ea18e8a6babc132a8716bb2f08b9", "status": "affected", "versionType": "git" }, { "version": "72efd585f7144a047f7da63864284764596ccad9", "lessThan": "cf366ee3bc1b7d1c76a882640ba3b3f8f1039163", "status": "affected", "versionType": "git" }, { "version": "72efd585f7144a047f7da63864284764596ccad9", "lessThan": "87b3593bed1868b2d9fe096c01bcdf0ea86cbebf", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/net/netfilter/nf_flow_table.h", "net/netfilter/nf_flow_table_inet.c", "net/netfilter/nf_flow_table_ip.c" ], "versions": [ { "version": "5.13", "status": "affected" }, { "version": "0", "lessThan": "5.13", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.157", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.88", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.29", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8.8", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9", "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": "5.13", "versionEndExcluding": "5.15.157" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.1.88" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.6.29" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.8.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.9" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d06977b9a4109f8738bb276125eb6a0b772bc433" }, { "url": "https://git.kernel.org/stable/c/8bf7c76a2a207ca2b4cfda0a279192adf27678d7" }, { "url": "https://git.kernel.org/stable/c/a2471d271042ea18e8a6babc132a8716bb2f08b9" }, { "url": "https://git.kernel.org/stable/c/cf366ee3bc1b7d1c76a882640ba3b3f8f1039163" }, { "url": "https://git.kernel.org/stable/c/87b3593bed1868b2d9fe096c01bcdf0ea86cbebf" } ], "title": "netfilter: flowtable: validate pppoe header", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-07-17T15:04:34.814514Z", "id": "CVE-2024-27016", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-17T15:04:50.051Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/d06977b9a4109f8738bb276125eb6a0b772bc433", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/8bf7c76a2a207ca2b4cfda0a279192adf27678d7", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/a2471d271042ea18e8a6babc132a8716bb2f08b9", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/cf366ee3bc1b7d1c76a882640ba3b3f8f1039163", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/87b3593bed1868b2d9fe096c01bcdf0ea86cbebf", "tags": [ "x_transferred" ] }, { "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/" }, { "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/" }, { "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-04T17:17:20.124Z" } } ] } }