{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-42314", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-30T07:40:12.277Z", "datePublished": "2024-08-17T09:09:23.047Z", "dateUpdated": "2026-08-05T11:36:36.342Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:36:36.342Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix extent map use-after-free when adding pages to compressed bio\n\nAt add_ra_bio_pages() we are accessing the extent map to calculate\n'add_size' after we dropped our reference on the extent map, resulting\nin a use-after-free. Fix this by computing 'add_size' before dropping our\nextent map reference." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - btrfs is a local filesystem; the vulnerable readahead code is reached via a read() syscall on a compressed file, not over any network protocol.\nAC:L - The UAF requires the extent map to be freed concurrently (e.g. by the extent-map shrinker under memory pressure), but the attacker controls both the compressed reads and the memory pressure and can retry the race indefinitely.\nPR:L - Any local unprivileged user who can read a compressed file on a btrfs mount reaches this path; the user can create their own compressed file, so no elevated privileges are needed.\nUI:N - The attacker triggers the compressed reads and memory pressure themselves; no action by a separate victim is required.\nS:U - The use-after-free corrupts kernel slab memory within the kernel's own security authority; no boundary such as a VM or IOMMU is crossed.\nC:H - A use-after-free gives an attacker influence over the reallocated freed-object contents, which per kernel CNA guidance is treated as enabling arbitrary kernel memory disclosure.\nI:H - A use-after-free enables heap grooming and control over freed-object contents, treated as a High integrity impact for kernel memory corruption.\nA:H - The use-after-free readily causes kernel crashes/oops (KASAN, slab corruption), a High availability impact." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/btrfs/compression.c" ], "versions": [ { "version": "6a4049102055250256623ab1875fabd89004bff8", "lessThan": "c1cc3326e27b0bd7a2806b40bc48e49afaf951e7", "status": "affected", "versionType": "git" }, { "version": "6a4049102055250256623ab1875fabd89004bff8", "lessThan": "c205565e0f2f439f278a4a94ee97b67ef7b56ae8", "status": "affected", "versionType": "git" }, { "version": "6a4049102055250256623ab1875fabd89004bff8", "lessThan": "b7859ff398b6b656e1689daa860eb34837b4bb89", "status": "affected", "versionType": "git" }, { "version": "6a4049102055250256623ab1875fabd89004bff8", "lessThan": "8e7860543a94784d744c7ce34b78a2e11beefa5c", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/btrfs/compression.c" ], "versions": [ { "version": "5.16", "status": "affected" }, { "version": "0", "lessThan": "5.16", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.108", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.44", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.3", "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": "5.16", "versionEndExcluding": "6.1.108" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.6.44" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.10.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.11" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/c1cc3326e27b0bd7a2806b40bc48e49afaf951e7" }, { "url": "https://git.kernel.org/stable/c/c205565e0f2f439f278a4a94ee97b67ef7b56ae8" }, { "url": "https://git.kernel.org/stable/c/b7859ff398b6b656e1689daa860eb34837b4bb89" }, { "url": "https://git.kernel.org/stable/c/8e7860543a94784d744c7ce34b78a2e11beefa5c" } ], "title": "btrfs: fix extent map use-after-free when adding pages to compressed bio", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-42314", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T16:09:49.130519Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-12T17:33:04.999Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:04:34.301Z" } } ] } }