{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-54456", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-27T02:16:34.098Z", "datePublished": "2025-02-27T02:18:08.143Z", "dateUpdated": "2026-08-05T11:44:49.902Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:44:49.902Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFS: Fix potential buffer overflowin nfs_sysfs_link_rpc_client()\n\nname is char[64] where the size of clnt->cl_program->name remains\nunknown. Invoking strcat() directly will also lead to potential buffer\noverflow. Change them to strscpy() and strncat() to fix potential\nissues." } ], "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 is in the NFS *client* and is reached through local filesystem operations — a `mount -t nfs` or, without any privilege, ordinary path traversal that triggers `nfs_d_automount` on an already-mounted share. Although a malicious/compromised NFS server can drive the referral submount that reaches the function, the write itself is performed from local kernel-side data, so Local is the correct vector.\nAC:L - The code path is executed deterministically on every NFS mount and every crossmnt/referral submount, with no race, no timing window, and no memory-layout precondition outside the attacker's influence.\nPR:L - `nfs_clone_server()` → `nfs_sysfs_link_rpc_client()` is invoked from the `d_automount` dentry op on plain path traversal, so any unprivileged local user with access to an NFS mount (a very common configuration — autofs/NFS home directories) reaches the function with no capability check.\nUI:N - Automount-driven submounts happen automatically as a side effect of the attacker's own directory traversal; no separate victim action is required.\nS:U - Stack corruption in the NFS client stays within the kernel's own security authority — no VM, IOMMU, or sandbox boundary is crossed.\nC:H - An out-of-bounds write past a 64-byte kernel stack buffer overwrites adjacent frame state and, once leveraged into a control-flow or pointer primitive, permits disclosure of arbitrary kernel memory. Per kernel guidance, memory corruption that can be leveraged for info disclosure is scored High.\nI:H - Unbounded `strcpy`/`strcat` into a stack array is a classic out-of-bounds write reaching saved registers and the return address, which is directly exploitable for control-flow hijack and arbitrary kernel modification; OOB writes are scored High.\nA:H - Overwriting the saved return address or stack canary causes a stack-protector panic or an oops on return, crashing the kernel." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/nfs/sysfs.c" ], "versions": [ { "version": "e13b549319a684dd80c4cc25e9567a5c84007e32", "lessThan": "19b3ca651b4b473878c73539febe477905041442", "status": "affected", "versionType": "git" }, { "version": "e13b549319a684dd80c4cc25e9567a5c84007e32", "lessThan": "dd8830779b77f4d1206d28d02ad56a03fc0e78f7", "status": "affected", "versionType": "git" }, { "version": "e13b549319a684dd80c4cc25e9567a5c84007e32", "lessThan": "e8e0eb5601d4a6c74c336e3710afe3a0348c469d", "status": "affected", "versionType": "git" }, { "version": "e13b549319a684dd80c4cc25e9567a5c84007e32", "lessThan": "49fd4e34751e90e6df009b70cd0659dc839e7ca8", "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/nfs/sysfs.c" ], "versions": [ { "version": "6.5", "status": "affected" }, { "version": "0", "lessThan": "6.5", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.79", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.16", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13.4", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.14", "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": "6.5", "versionEndExcluding": "6.6.79" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.12.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.13.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.14" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/19b3ca651b4b473878c73539febe477905041442" }, { "url": "https://git.kernel.org/stable/c/dd8830779b77f4d1206d28d02ad56a03fc0e78f7" }, { "url": "https://git.kernel.org/stable/c/e8e0eb5601d4a6c74c336e3710afe3a0348c469d" }, { "url": "https://git.kernel.org/stable/c/49fd4e34751e90e6df009b70cd0659dc839e7ca8" } ], "title": "NFS: Fix potential buffer overflowin nfs_sysfs_link_rpc_client()", "x_generator": { "engine": "bippy-1.2.0" } } } }