{ "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" } } ] } }