CVE-2025-38058
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
__legitimize_mnt(): check for MNT_SYNC_UMOUNT should be under mount_lock
... or we risk stealing final mntput from sync umount - raising mnt_count after umount(2) has verified that victim is not busy, but before it has set MNT_SYNC_UMOUNT; in that case __legitimize_mnt() doesn't see that it's safe to quietly undo mnt_count increment and leaves dropping the reference to caller, where it'll be a full-blown mntput().
Check under mount_lock is needed; leaving the current one done before taking that makes no sense - it's nowhere near common enough to bother with.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.17%
- Percentil entre todas las CVEs puntuadas: 5
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (2)
CWE
- CWE-667
Referencias
- https://git.kernel.org/stable/c/250cf3693060a5f803c5f1ddc082bb06b16112a9
- https://git.kernel.org/stable/c/628fb00195ce21a90cf9e4e3d105cd9e58f77b40
- https://git.kernel.org/stable/c/8cafd7266fa02e0863bacbf872fe635c0b9725eb
- https://git.kernel.org/stable/c/9b0915e72b3cf52474dcee0b24a2f99d93e604a3
- https://git.kernel.org/stable/c/b55996939c71a3e1a38f3cdc6a8859797efc9083
- https://git.kernel.org/stable/c/b89eb56a378b7b2c1176787fc228d0a57172bdd5
- https://git.kernel.org/stable/c/d8ece4ced3b051e656c77180df2e69e19e24edc1
- https://git.kernel.org/stable/c/f6d45fd92f62845cbd1eb5128fd8f0ed7d0c5a42
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
JSON original (NVD)
Mostrar
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"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."
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