{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-41090", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-12T12:17:45.635Z", "datePublished": "2024-07-29T06:18:10.896Z", "dateUpdated": "2026-08-05T11:35:18.598Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:35:18.598Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntap: add missing verification for short frame\n\nThe cited commit missed to check against the validity of the frame length\nin the tap_get_user_xdp() path, which could cause a corrupted skb to be\nsent downstack. Even before the skb is transmitted, the\ntap_get_user_xdp()-->skb_set_network_header() may assume the size is more\nthan ETH_HLEN. Once transmitted, this could either cause out-of-bound\naccess beyond the actual length, or confuse the underlayer with incorrect\nor inconsistent header length in the skb metadata.\n\nIn the alternative path, tap_get_user() already prohibits short frame which\nhas the length less than Ethernet header size from being transmitted.\n\nThis is to drop any frame shorter than the Ethernet header size just like\nhow tap_get_user() does.\n\nCVE: CVE-2024-41090" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable code is reached only through vhost-net's batched XDP TX path, driven either by a guest VM's TX virtqueue on the same host or by a local process holding /dev/vhost-net plus a macvtap/ipvtap fd. Data arrives via shared memory rings, not from a remote network peer, so this is local rather than network access.\nAC:L - The attacker simply posts a TX descriptor whose payload is shorter than 14 bytes and kicks the virtqueue; vhost_net_build_xdp() only rejects len < sock_hlen, so the short frame reaches tap_get_user_xdp() deterministically. The XDP batch path is active in the default QEMU configuration (unlimited sndbuf), and can be retried indefinitely.\nPR:L - The attacker must be an authorized guest VM on the host, or a local user with access to /dev/vhost-net and a tap/macvtap character device — some privilege, but nothing resembling host root. No CAP_SYS_ADMIN or init-namespace root is needed to trigger the path.\nUI:N - The malformed frame is processed entirely by the vhost worker kthread as soon as the guest kicks the ring; no host administrator or victim action is involved.\nS:C - A guest VM with zero host privileges corrupts host-kernel skb state and leaks host heap contents, crossing the guest/host virtualization boundary; the impacted resources (host kernel, physical NIC path, peer macvtap interfaces belonging to other tenants) lie outside the attacking guest's security authority.\nC:H - skb->protocol is populated from eth_hdr() bytes that were never copied from the guest, exposing uninitialized page_frag memory that can contain remnants of previously transmitted host/other-guest packets, and the sub-ETH_HLEN skb causes downstream code to read beyond the actual frame length. The resulting memory-disclosure primitive is not bounded to a trivial value.\nI:H - A corrupted skb with network_header pointing past skb->tail is passed to dev_queue_xmit(), so lower-layer drivers and offload code compute header lengths that underflow to enormous unsigned values, yielding out-of-bounds accesses and DMA/copy lengths attacker-influencing kernel memory. Such skb metadata corruption is leverageable for control-flow-relevant memory corruption.\nA:H - The out-of-bounds accesses and inconsistent header offsets in downstream network drivers readily produce a kernel oops or panic on the host, and the guest can repeat the trigger at will to keep the host down." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/tap.c" ], "versions": [ { "version": "0efac27791ee068075d80f07c55a229b1335ce12", "lessThan": "8be915fc5ff9a5e296f6538be12ea75a1a93bdea", "status": "affected", "versionType": "git" }, { "version": "0efac27791ee068075d80f07c55a229b1335ce12", "lessThan": "7431144b406ae82807eb87d8c98e518475b0450f", "status": "affected", "versionType": "git" }, { "version": "0efac27791ee068075d80f07c55a229b1335ce12", "lessThan": "e5e5e63c506b93b89b01f522b6a7343585f784e6", "status": "affected", "versionType": "git" }, { "version": "0efac27791ee068075d80f07c55a229b1335ce12", "lessThan": "ee93e6da30377cf2a75e16cd32bb9fcd86a61c46", "status": "affected", "versionType": "git" }, { "version": "0efac27791ee068075d80f07c55a229b1335ce12", "lessThan": "aa6a5704cab861c9b2ae9f475076e1881e87f5aa", "status": "affected", "versionType": "git" }, { "version": "0efac27791ee068075d80f07c55a229b1335ce12", "lessThan": "73d462a38d5f782b7c872fe9ae8393d9ef5483da", "status": "affected", "versionType": "git" }, { "version": "0efac27791ee068075d80f07c55a229b1335ce12", "lessThan": "e1a786b9bbb767fd1c922d424aaa8078cc542309", "status": "affected", "versionType": "git" }, { "version": "0efac27791ee068075d80f07c55a229b1335ce12", "lessThan": "ed7f2afdd0e043a397677e597ced0830b83ba0b3", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/tap.c" ], "versions": [ { "version": "4.20", "status": "affected" }, { "version": "0", "lessThan": "4.20", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.281", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.223", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.164", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.102", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.43", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9.12", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.2", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], 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"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.10.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.11" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/8be915fc5ff9a5e296f6538be12ea75a1a93bdea" }, { "url": "https://git.kernel.org/stable/c/7431144b406ae82807eb87d8c98e518475b0450f" }, { "url": "https://git.kernel.org/stable/c/e5e5e63c506b93b89b01f522b6a7343585f784e6" }, { "url": "https://git.kernel.org/stable/c/ee93e6da30377cf2a75e16cd32bb9fcd86a61c46" }, { "url": "https://git.kernel.org/stable/c/aa6a5704cab861c9b2ae9f475076e1881e87f5aa" }, { "url": "https://git.kernel.org/stable/c/73d462a38d5f782b7c872fe9ae8393d9ef5483da" }, { "url": "https://git.kernel.org/stable/c/e1a786b9bbb767fd1c922d424aaa8078cc542309" }, { "url": "https://git.kernel.org/stable/c/ed7f2afdd0e043a397677e597ced0830b83ba0b3" } ], "title": "tap: add missing verification for short frame", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/8be915fc5ff9a5e296f6538be12ea75a1a93bdea", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/7431144b406ae82807eb87d8c98e518475b0450f", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/e5e5e63c506b93b89b01f522b6a7343585f784e6", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/ee93e6da30377cf2a75e16cd32bb9fcd86a61c46", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/aa6a5704cab861c9b2ae9f475076e1881e87f5aa", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/73d462a38d5f782b7c872fe9ae8393d9ef5483da", "tags": [ "x_transferred" ] }, { "url": 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