{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-50087", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T19:36:19.942Z", "datePublished": "2024-10-29T00:50:30.313Z", "dateUpdated": "2026-08-05T11:41:32.766Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:41:32.766Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix uninitialized pointer free on read_alloc_one_name() error\n\nThe function read_alloc_one_name() does not initialize the name field of\nthe passed fscrypt_str struct if kmalloc fails to allocate the\ncorresponding buffer. Thus, it is not guaranteed that\nfscrypt_str.name is initialized when freeing it.\n\nThis is a follow-up to the linked patch that fixes the remaining\ninstances of the bug introduced by commit e43eec81c516 (\"btrfs: use\nstruct qstr instead of name and namelen pairs\")." } ], "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 - The vulnerable code executes only in the btrfs mount-time log-replay path (`btrfs_replay_log()` → `replay_one_buffer()`/`replay_dir_deletes()`), reached through the local `mount()` syscall on a local block device or loop image. There is no remote or adjacent-network path into tree-log replay.\nAC:L - The attacker supplies the image, so log replay is guaranteed to run and can be padded with thousands of dir-index entries, each producing another `kmalloc(GFP_NOFS)` attempt; the required allocation failure is induced by attacker-generated memory pressure (userspace ballooning, or a memcg-constrained mount context), which is within the attacker's influence rather than beyond it.\nPR:L - In the most severe realistic deployment — desktops and kiosks running udisks2/removable-media automount, which supports btrfs — an unprivileged local user mounts an attacker-prepared btrfs volume with a dirty log without holding root, and the concurrent memory-pressure side needs no privileges at all.\nUI:N - The attacker performs the triggering mount themselves via automount of attacker-controlled removable media or a mount helper; no separate victim has to open a file or take any action.\nS:U - The corruption occurs in kernel slab memory during mount and stays entirely within the kernel's own security authority, with no crossing of a hypervisor, IOMMU, or sandbox boundary.\nC:H - `kfree()` on an uninitialized stack value can release a still-live slab object whose stale pointer was left by earlier frames in the same mount call chain, yielding a use-after-free that can be reallocated with attacker-chosen data and read back, exposing arbitrary kernel memory.\nI:H - The arbitrary/premature free gives a classic heap-corruption primitive — reclaiming the freed object with a sprayed structure permits attacker-controlled writes into kernel objects and potential control-flow hijack.\nA:H - Freeing a wild pointer typically faults inside the allocator or trips slab consistency checks, and the resulting use-after-free corrupts kernel state during mount, producing an oops or panic." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/btrfs/tree-log.c" ], "versions": [ { "version": "1cf474cd474bc5d3ef63086ffd009a87a5b7bb2e", "lessThan": "b37de9491f140a0ff125c27dd1050185c3accbc1", "status": "affected", "versionType": "git" }, { "version": "e43eec81c5167b655b72c781b0e75e62a05e415e", "lessThan": "7fc7c47b9ba0cf2d192f2117a64b24881b0b577f", "status": "affected", "versionType": "git" }, { "version": "e43eec81c5167b655b72c781b0e75e62a05e415e", "lessThan": "1ec28de5e476913ae51f909660b4447eddb28838", "status": "affected", "versionType": "git" }, { "version": "e43eec81c5167b655b72c781b0e75e62a05e415e", "lessThan": "2ab5e243c2266c841e0f6904fad1514b18eaf510", "status": "affected", "versionType": "git" }, { "version": "6.1.57", "lessThan": "6.1.114", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/btrfs/tree-log.c" ], "versions": [ { "version": "6.2", "status": "affected" }, { "version": "0", "lessThan": "6.2", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.114", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.58", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.5", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12", "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": "6.1.57", "versionEndExcluding": "6.1.114" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.6.58" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.11.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/b37de9491f140a0ff125c27dd1050185c3accbc1" }, { "url": "https://git.kernel.org/stable/c/7fc7c47b9ba0cf2d192f2117a64b24881b0b577f" }, { "url": "https://git.kernel.org/stable/c/1ec28de5e476913ae51f909660b4447eddb28838" }, { "url": "https://git.kernel.org/stable/c/2ab5e243c2266c841e0f6904fad1514b18eaf510" } ], "title": "btrfs: fix uninitialized pointer free on read_alloc_one_name() error", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2024-50087", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2025-10-01T20:23:12.303362Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-824", "description": "CWE-824 Access of Uninitialized Pointer" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T20:27:20.200Z" } }, { "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": "2025-11-03T22:25:20.291Z" } } ] } }