__legitimize_mnt(): check for MNT_SYNC_UMOUNT should be under mount_lock (Linux Linux)

CVE-2025-38058
HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.17 % · centile 6 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

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.

Faiblesses (CWE)

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 48a066e72d970a3e225a9c18690d570c736fc455 < 628fb00195ce21a90cf9e4e3d105cd9e58f77b40 ; affected 48a066e72d970a3e225a9c18690d570c736fc455 < b89eb56a378b7b2c1176787fc228d0a57172bdd5 ; affected 48a066e72d970a3e225a9c18690d570c736fc455 < f6d45fd92f62845cbd1eb5128fd8f0ed7d0c5a42 ; affected 48a066e72d970a3e225a9c18690d570c736fc455 < 9b0915e72b3cf52474dcee0b24a2f99d93e604a3 ; affected 48a066e72d970a3e225a9c18690d570c736fc455 < d8ece4ced3b051e656c77180df2e69e19e24edc1 ; affected 48a066e72d970a3e225a9c18690d570c736fc455 < 8cafd7266fa02e0863bacbf872fe635c0b9725eb
Linux · Linuxaffected 3.13 ; unaffected 0 < 3.13 ; unaffected 5.4.294 ≤ 5.4.* ; unaffected 5.10.238 ≤ 5.10.* ; unaffected 5.15.185 ≤ 5.15.* ; unaffected 6.1.141 ≤ 6.1.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD