{"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"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.4.281"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.10.223"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.15.164"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.1.102"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.6.43"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.9.12"},{"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: 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