{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-38058", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.979Z", "datePublished": "2025-06-18T09:33:38.022Z", "dateUpdated": "2026-08-05T11:59:08.465Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:59:08.465Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\n__legitimize_mnt(): check for MNT_SYNC_UMOUNT should be under mount_lock\n\n... or we risk stealing final mntput from sync umount - raising mnt_count\nafter umount(2) has verified that victim is not busy, but before it\nhas set MNT_SYNC_UMOUNT; in that case __legitimize_mnt() doesn't see\nthat it's safe to quietly undo mnt_count increment and leaves dropping\nthe reference to caller, where it'll be a full-blown mntput().\n\nCheck under mount_lock is needed; leaving the current one done before\ntaking that makes no sense - it's nowhere near common enough to bother\nwith." } ], "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 race is driven entirely through local syscalls — `umount(2)` on one thread and ordinary path lookups (`stat`/`open`/`openat`) on another. No network or physical access is involved.\nAC:L - The attacker controls both sides of the race: a private mount namespace lets them loop `umount()` on their own mount while sibling threads loop RCU path walks over it, so the narrow window between `propagate_mount_busy()` and the `MNT_SYNC_UMOUNT` store can be retried indefinitely on any SMP system (the default configuration).\nPR:L - `can_umount()`/`may_mount()` only require `CAP_SYS_ADMIN` in the user namespace owning the mount namespace, which any unprivileged user obtains via `unshare -Urm`; the path-walk half of the race requires no privileges whatsoever.\nUI:N - The attacker performs both the umount and the concurrent path lookups from its own threads; no victim action or cooperation is needed.\nS:U - The corruption is confined to VFS mount/superblock objects inside the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is a use-after-free-class refcount race on `struct mount` — the same defect family whose failure mode in `__legitimize_mnt()` was previously \"use-after-free galore\" — and control over freed/reused mount and superblock objects yields an arbitrary kernel read primitive.\nI:H - A stolen final `mntput()` drives `cleanup_mnt()`/`deactivate_super()` and `mnt_instance`/`mnt_mounts` list surgery outside the RCU-grace-period ordering the sync-umount path establishes, giving heap-spray and list-corruption write primitives usable for control-flow hijack.\nA:H - The stolen reference produces refcount-imbalance `WARN_ON`s, mount/superblock teardown at an arbitrary later time after `umount(2)` reported success, and use-after-free oopses that panic the kernel." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/namespace.c" ], "versions": [ { "version": "48a066e72d970a3e225a9c18690d570c736fc455", "lessThan": "628fb00195ce21a90cf9e4e3d105cd9e58f77b40", "status": "affected", "versionType": "git" }, { "version": "48a066e72d970a3e225a9c18690d570c736fc455", "lessThan": "b89eb56a378b7b2c1176787fc228d0a57172bdd5", "status": "affected", "versionType": "git" }, { "version": "48a066e72d970a3e225a9c18690d570c736fc455", "lessThan": "f6d45fd92f62845cbd1eb5128fd8f0ed7d0c5a42", "status": "affected", "versionType": "git" }, { "version": "48a066e72d970a3e225a9c18690d570c736fc455", "lessThan": "9b0915e72b3cf52474dcee0b24a2f99d93e604a3", "status": "affected", "versionType": "git" }, { "version": "48a066e72d970a3e225a9c18690d570c736fc455", "lessThan": "d8ece4ced3b051e656c77180df2e69e19e24edc1", "status": "affected", "versionType": "git" }, { "version": "48a066e72d970a3e225a9c18690d570c736fc455", "lessThan": "8cafd7266fa02e0863bacbf872fe635c0b9725eb", "status": "affected", "versionType": "git" }, { "version": "48a066e72d970a3e225a9c18690d570c736fc455", "lessThan": "b55996939c71a3e1a38f3cdc6a8859797efc9083", "status": "affected", "versionType": "git" }, { "version": "48a066e72d970a3e225a9c18690d570c736fc455", "lessThan": "250cf3693060a5f803c5f1ddc082bb06b16112a9", "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/namespace.c" ], "versions": [ { "version": "3.13", "status": "affected" }, { "version": "0", "lessThan": "3.13", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.294", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.238", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.185", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.141", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.93", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.31", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.14.9", "lessThanOrEqual": "6.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15", "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": "3.13", "versionEndExcluding": "5.4.294" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "5.10.238" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "5.15.185" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.1.141" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.6.93" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.12.31" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.14.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.15" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/628fb00195ce21a90cf9e4e3d105cd9e58f77b40" }, { "url": "https://git.kernel.org/stable/c/b89eb56a378b7b2c1176787fc228d0a57172bdd5" }, { "url": "https://git.kernel.org/stable/c/f6d45fd92f62845cbd1eb5128fd8f0ed7d0c5a42" }, { "url": "https://git.kernel.org/stable/c/9b0915e72b3cf52474dcee0b24a2f99d93e604a3" }, { "url": "https://git.kernel.org/stable/c/d8ece4ced3b051e656c77180df2e69e19e24edc1" }, { "url": "https://git.kernel.org/stable/c/8cafd7266fa02e0863bacbf872fe635c0b9725eb" }, { "url": "https://git.kernel.org/stable/c/b55996939c71a3e1a38f3cdc6a8859797efc9083" }, { "url": "https://git.kernel.org/stable/c/250cf3693060a5f803c5f1ddc082bb06b16112a9" } ], "title": "__legitimize_mnt(): check for MNT_SYNC_UMOUNT should be under mount_lock", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T17:33:27.007Z" } }, { "x_adpType": "supplier", "providerMetadata": { "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-07-14T12:41:20.494Z" }, "affected": [ { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" } ], "references": [ { "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html" } ] } ] } }