{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-40937", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-12T12:17:45.584Z", "datePublished": "2024-07-12T12:25:13.807Z", "dateUpdated": "2026-08-05T11:34:07.395Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:34:07.395Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngve: Clear napi->skb before dev_kfree_skb_any()\n\ngve_rx_free_skb incorrectly leaves napi->skb referencing an skb after it\nis freed with dev_kfree_skb_any(). This can result in a subsequent call\nto napi_get_frags returning a dangling pointer.\n\nFix this by clearing napi->skb before the skb is freed." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "scenarios": [ { "lang": "en", "value": "AV:N - The vulnerable code is the gVNIC DQO NAPI receive poll (`gve_rx_poll_dqo`), executed in softirq context for every frame arriving on the wire. gve is the primary NIC on Google Compute Engine instances that are routinely internet-facing, so a remote attacker reaches the code purely by sending packets.\nAC:L - The attacker controls both trigger ingredients — packet shape (large multi-buffer/RSC frames above rx_copybreak, malformed or truncated frames causing the device to set rx_error mid-packet) and the traffic volume that drives the GFP_ATOMIC allocation failures in gve_rx_append_frags/gve_rx_copy_ondemand. The error path can be provoked repeatedly at line rate until it lands.\nPR:N - There is no syscall, ioctl, socket, capability check or authentication anywhere on the path; the receive poll runs unconditionally on incoming frames. An entirely unauthenticated off-host attacker can reach it.\nUI:N - No victim action is required — the driver processes received packets automatically in softirq context. Simply having the interface up is sufficient.\nS:U - The corruption is confined to the kernel's own memory within the same security authority; there is no crossing of a VM, IOMMU or sandbox boundary. Standard kernel-level compromise is Unchanged.\nC:H - The stale napi->skb is a freed sk_buff on the heavily-sprayable skbuff_head_cache; the driver and the subsequent napi_gro_frags/GRO path read skb->head, skb->data, skb_headlen and skb_shinfo from reallocated memory, so attacker-groomed or unrelated kernel data is parsed and can be leaked out via the receive path.\nI:H - The dangling pointer is written through — skb_add_rx_frag updates len/data_len/truesize and skb_shinfo, and gve_rx_complete_skb writes hash, ip_summed, gso_type and gso_size into freed memory — giving a write-after-free into a general-purpose slab plus a subsequent double free, which is the classic basis for control-flow hijack and privilege escalation.\nA:H - Use of the freed sk_buff reliably produces slab corruption, KASAN splats, list corruption and kernel panics, and the double free of the skb compounds this. A remote attacker can crash the host repeatedly." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/google/gve/gve_rx_dqo.c" ], "versions": [ { "version": "9b8dd5e5ea48bbb7532d20c4093a79d8283e4029", "lessThan": "75afd8724739ee5ed8165acde5f6ac3988b485cc", "status": "affected", "versionType": "git" }, { "version": "9b8dd5e5ea48bbb7532d20c4093a79d8283e4029", "lessThan": "d221284991118c0ab16480b53baecd857c0bc442", "status": "affected", "versionType": "git" }, { "version": "9b8dd5e5ea48bbb7532d20c4093a79d8283e4029", "lessThan": "2ce5341c36993b776012601921d7688693f8c037", "status": "affected", "versionType": "git" }, { "version": "9b8dd5e5ea48bbb7532d20c4093a79d8283e4029", "lessThan": "a68184d5b420ea4fc7e6b7ceb52bbc66f90d3c50", "status": "affected", "versionType": "git" }, { "version": "9b8dd5e5ea48bbb7532d20c4093a79d8283e4029", "lessThan": "6f4d93b78ade0a4c2cafd587f7b429ce95abb02e", "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/ethernet/google/gve/gve_rx_dqo.c" ], "versions": [ { "version": "5.14", "status": "affected" }, { "version": "0", "lessThan": "5.14", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.162", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.95", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.35", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9.6", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10", "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": "5.14", "versionEndExcluding": "5.15.162" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.1.95" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.6.35" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.9.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.10" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/75afd8724739ee5ed8165acde5f6ac3988b485cc" }, { "url": "https://git.kernel.org/stable/c/d221284991118c0ab16480b53baecd857c0bc442" }, { "url": "https://git.kernel.org/stable/c/2ce5341c36993b776012601921d7688693f8c037" }, { "url": "https://git.kernel.org/stable/c/a68184d5b420ea4fc7e6b7ceb52bbc66f90d3c50" }, { "url": "https://git.kernel.org/stable/c/6f4d93b78ade0a4c2cafd587f7b429ce95abb02e" } ], "title": "gve: Clear napi->skb before dev_kfree_skb_any()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/75afd8724739ee5ed8165acde5f6ac3988b485cc", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/d221284991118c0ab16480b53baecd857c0bc442", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/2ce5341c36993b776012601921d7688693f8c037", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/a68184d5b420ea4fc7e6b7ceb52bbc66f90d3c50", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/6f4d93b78ade0a4c2cafd587f7b429ce95abb02e", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T21:58:03.988Z" } }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-40937", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T17:04:39.753649Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:26.574Z" } } ] } }