{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-53136", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-11-19T17:17:24.996Z", "datePublished": "2024-12-04T14:20:41.634Z", "dateUpdated": "2026-08-05T11:44:00.526Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:44:00.526Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: revert \"mm: shmem: fix data-race in shmem_getattr()\"\n\nRevert d949d1d14fa2 (\"mm: shmem: fix data-race in shmem_getattr()\") as\nsuggested by Chuck [1]. It is causing deadlocks when accessing tmpfs over\nNFS.\n\nAs Hugh commented, \"added just to silence a syzbot sanitizer splat: added\nwhere there has never been any practical problem\"." } ], "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 deadlock is triggered by nfsd processing NFS RPCs from a remote client over TCP/2049 against a tmpfs export — `nfsd_setattr()`/`nfsd_create()`/`nfsd_unlink()`/`nfsd_rename()` hold `i_rwsem` for write and then call `vfs_getattr()` on the same inode. A remote NFS client issuing a single CREATE or SETATTR hangs the server.\nAC:L - This is a deterministic recursive rwsem acquisition (`down_write` then `down_read` on the same lock by the same task), not a race — every metadata-modifying NFS operation on a tmpfs export deadlocks 100% of the time on the first attempt.\nPR:N - NFSv3/NFSv4 with AUTH_SYS performs no cryptographic authentication — a client permitted by the export simply asserts a UID, so no credentials on the server are required; a world-writable or anon-squashed tmpfs export lets an entirely unauthenticated remote peer reach `fh_fill_pre_attrs()` under the held inode lock.\nUI:N - The attacker sends the NFS request directly; no action by a local user or administrator is needed at exploit time, only the pre-existing tmpfs export configuration.\nS:U - The deadlocked task, the held `i_rwsem`, and all resulting hangs are within the kernel's own security authority; no boundary between security scopes is crossed.\nC:N - The bug is a lock-ordering/recursion deadlock with no out-of-bounds access, no freed-memory reuse, and no data returned to the attacker — nothing is disclosed.\nI:N - No memory corruption or unauthorized modification occurs; the operation simply never completes, so no data is written incorrectly.\nA:H - The nfsd thread blocks unkillably in `TASK_UNINTERRUPTIBLE` while holding the inode's `i_rwsem` forever, wedging every further access to that inode from both NFS clients and local processes and exhausting nfsd threads — a permanent, unrecoverable denial of service requiring a reboot." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "mm/shmem.c" ], "versions": [ { "version": "9fb9703cd43ee20a6de8ccdef991677b7274cec0", "lessThan": "36b537e8f302f670c7cf35d88a3a294443e32d52", "status": "affected", "versionType": "git" }, { "version": "7cc30ada84323be19395094d567579536e0d187e", "lessThan": "a3c65022d89d5baa2cea8e87a6de983ea305f14c", "status": "affected", "versionType": "git" }, { "version": "bda1a99a0dd644f31a87d636ac624eeb975cb65a", "lessThan": "57cc8d253099d1b8627f0fb487ee011d9158ccc9", "status": "affected", "versionType": "git" }, { "version": "3d9528484480e8f4979b3a347930ed383be99f89", "lessThan": "d3f9d88c2c03b2646ace336236adca19f7697bd3", "status": "affected", "versionType": "git" }, { "version": "82cae1e30bd940253593c2d4f16d88343d1358f4", "lessThan": "5874c1150e77296565ad6e495ef41fbf87570d14", "status": "affected", "versionType": "git" }, { "version": "edd1f905050686fdc4cfe233d818469fdf7d5ff8", "lessThan": "64e67e8694252c1bf01b802ee911be3fee62c36b", "status": "affected", "versionType": "git" }, { "version": "ffd56612566bc23877c8f45def2801f3324a222a", "lessThan": "901dc2ad7c3789fa87dc3956f6697c5d62d5cf7e", "status": "affected", "versionType": "git" }, { "version": "d949d1d14fa281ace388b1de978e8f2cd52875cf", "lessThan": "d1aa0c04294e29883d65eac6c2f72fe95cc7c049", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "mm/shmem.c" ], "versions": [ { "version": "4.19.323", "lessThan": "4.19.325", "status": "affected", "versionType": "semver" }, { "version": "5.4.285", "lessThan": "5.4.287", "status": "affected", "versionType": "semver" }, { "version": "5.10.229", "lessThan": "5.10.231", "status": "affected", "versionType": "semver" }, { "version": "5.15.171", "lessThan": "5.15.174", "status": "affected", "versionType": "semver" }, { "version": "6.1.116", "lessThan": "6.1.119", "status": "affected", "versionType": "semver" }, { "version": "6.6.60", "lessThan": "6.6.63", "status": "affected", "versionType": "semver" }, { "version": "6.11.7", "lessThan": "6.11.10", "status": "affected", "versionType": "semver" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.323", "versionEndExcluding": "4.19.325" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.285", "versionEndExcluding": "5.4.287" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.229", "versionEndExcluding": "5.10.231" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.171", "versionEndExcluding": "5.15.174" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.116", "versionEndExcluding": "6.1.119" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.60", "versionEndExcluding": "6.6.63" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11.7", "versionEndExcluding": "6.11.10" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/36b537e8f302f670c7cf35d88a3a294443e32d52" }, { "url": "https://git.kernel.org/stable/c/a3c65022d89d5baa2cea8e87a6de983ea305f14c" }, { "url": "https://git.kernel.org/stable/c/57cc8d253099d1b8627f0fb487ee011d9158ccc9" }, { "url": "https://git.kernel.org/stable/c/d3f9d88c2c03b2646ace336236adca19f7697bd3" }, { "url": "https://git.kernel.org/stable/c/5874c1150e77296565ad6e495ef41fbf87570d14" }, { "url": "https://git.kernel.org/stable/c/64e67e8694252c1bf01b802ee911be3fee62c36b" }, { "url": "https://git.kernel.org/stable/c/901dc2ad7c3789fa87dc3956f6697c5d62d5cf7e" }, { "url": "https://git.kernel.org/stable/c/d1aa0c04294e29883d65eac6c2f72fe95cc7c049" } ], "title": "mm: revert \"mm: shmem: fix data-race in shmem_getattr()\"", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:29:39.267Z" } } ] } }