{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-27026","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-02-19T14:20:24.210Z","datePublished":"2024-05-01T12:49:31.685Z","dateUpdated":"2026-08-05T11:29:05.602Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T11:29:05.602Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nvmxnet3: Fix missing reserved tailroom\n\nUse rbi->len instead of rcd->len for non-dataring packet.\n\nFound issue:\n  XDP_WARN: xdp_update_frame_from_buff(line:278): Driver BUG: missing reserved tailroom\n  WARNING: CPU: 0 PID: 0 at net/core/xdp.c:586 xdp_warn+0xf/0x20\n  CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W  O       6.5.1 #1\n  RIP: 0010:xdp_warn+0xf/0x20\n  ...\n  ? xdp_warn+0xf/0x20\n  xdp_do_redirect+0x15f/0x1c0\n  vmxnet3_run_xdp+0x17a/0x400 [vmxnet3]\n  vmxnet3_process_xdp+0xe4/0x760 [vmxnet3]\n  ? vmxnet3_tq_tx_complete.isra.0+0x21e/0x2c0 [vmxnet3]\n  vmxnet3_rq_rx_complete+0x7ad/0x1120 [vmxnet3]\n  vmxnet3_poll_rx_only+0x2d/0xa0 [vmxnet3]\n  __napi_poll+0x20/0x180\n  net_rx_action+0x177/0x390"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:N - The bug is triggered purely by an inbound Ethernet frame arriving on the vmxnet3 vNIC and being processed in the NAPI receive path (`vmxnet3_rq_rx_complete` → `vmxnet3_process_xdp`); any remote host that can route a >946-byte packet to the VM reaches the vulnerable code. No local access to the target is needed.\nAC:L - The attacker fully controls the only condition that matters — packet size — and any ordinary frame above ~946 bytes (a single ICMP echo or one TCP segment of a bulk transfer) deterministically hits `xdp->data_end > xdp_data_hard_end(xdp)`. There is no race, no memory-layout dependency, and no state the attacker cannot influence.\nPR:N - The vulnerable code runs on packet receive before any authentication, authorization, or socket demultiplexing; the attacker needs no account or credentials on the target, only the ability to send a frame to its vmxnet3 interface.\nUI:N - Processing happens automatically in the driver's NAPI poll routine as soon as the packet is received; no action by any user or administrator on the victim system is required.\nS:U - The WARN, the packet drop, and any resulting panic are all confined to the kernel of the host running the vmxnet3 driver — the same security authority. No hypervisor, IOMMU, or sandbox boundary is crossed.\nC:N - The under-sized `frame_sz` only shrinks the region XDP is permitted to touch, so no out-of-bounds read occurs and `xdp_convert_buff_to_frame()` aborts before any data is forwarded. Nothing is returned to or readable by the attacker (the on-the-wire data leak came from the *later* `xdp_prepare_buff()` change, not from the pre-fix code).\nI:N - No out-of-bounds or overlapping write is possible — `vmxnet3_build_skb()` uses `PAGE_SIZE`, `bpf_xdp_adjust_tail()` is made more restrictive rather than less, and the error paths recycle the page exactly once with no double-free or state corruption.\nA:H - Every oversized frame executes a non-ratelimited `WARN(1, ...)` with a full stack dump from softirq context, letting an unauthenticated remote attacker flood the console/log at line rate (soft lockups, RCU stalls) and drop all XDP_REDIRECT/XDP_TX traffic; on kernels with `panic_on_warn=1` a single packet causes an immediate kernel panic."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/vmxnet3/vmxnet3_xdp.c"],"versions":[{"version":"54f00cce11786742bd11e5e68c3bf85e6dc048c9","lessThan":"aba8659caf88017507419feea06069f529329ea6","status":"affected","versionType":"git"},{"version":"54f00cce11786742bd11e5e68c3bf85e6dc048c9","lessThan":"7c8505ecc2d15473d679b8e06335434b84fffe86","status":"affected","versionType":"git"},{"version":"54f00cce11786742bd11e5e68c3bf85e6dc048c9","lessThan":"91d017d19d5a9ad153e2dc23ed3c0e2e79ef5262","status":"affected","versionType":"git"},{"version":"54f00cce11786742bd11e5e68c3bf85e6dc048c9","lessThan":"e127ce7699c1e05279ee5ee61f00893e7bfa9671","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/vmxnet3/vmxnet3_xdp.c"],"versions":[{"version":"6.6","status":"affected"},{"version":"0","lessThan":"6.6","status":"unaffected","versionType":"semver"},{"version":"6.6.23","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.7.11","lessThanOrEqual":"6.7.*","status":"unaffected","versionType":"semver"},{"version":"6.8.2","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":"6.6","versionEndExcluding":"6.6.23"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.7.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.8.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.9"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/aba8659caf88017507419feea06069f529329ea6"},{"url":"https://git.kernel.org/stable/c/7c8505ecc2d15473d679b8e06335434b84fffe86"},{"url":"https://git.kernel.org/stable/c/91d017d19d5a9ad153e2dc23ed3c0e2e79ef5262"},{"url":"https://git.kernel.org/stable/c/e127ce7699c1e05279ee5ee61f00893e7bfa9671"}],"title":"vmxnet3: Fix missing reserved tailroom","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-02T00:21:05.850Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/aba8659caf88017507419feea06069f529329ea6","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/7c8505ecc2d15473d679b8e06335434b84fffe86","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/91d017d19d5a9ad153e2dc23ed3c0e2e79ef5262","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/e127ce7699c1e05279ee5ee61f00893e7bfa9671","tags":["x_transferred"]}]},{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-27026","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T15:44:30.925692Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-09-11T17:33:35.147Z"}}]}}