CVE-2025-40150

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.3%
Linux•Linux•Versions : 6.9, <=6.12.*, 6.12.78, 6.17.3, <db489778e6f2a4034c2cd26fadda2796eba24dcd, 0, 6.18, <6.6.130, <=6.6.*, 40d76c393cca83938b11eb7ca8983aa3cd0ed69b, 6.6.33, 9703d69d9d153bb230711d0d577454552aeb13d4, <=*, <d625a2b08c089397d3a03bff13fa8645e4ec7a01, <=6.17.*, <6.9, <25d2dc669f2a7e48b335d1cb07139f2ffc9fe5df, 6.6.130, <eec1589be36fcf7440755703e4faeee2c01e360b

Description

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid migrating empty section It reports a bug from device w/ zufs: F2FS-fs (dm-64): Inconsistent segment (173822) type [1, 0] in SSA and SIT F2FS-fs (dm-64): Stopped filesystem due to reason: 4 Thread A Thread B - f2fs_expand_inode_data - f2fs_allocate_pinning_section - f2fs_gc_range - do_garbage_collect w/ segno #x - writepage - f2fs_allocate_data_block - new_curseg - allocate segno #x The root cause is: fallocate on pinning file may race w/ block allocation as above, result in do_garbage_collect() from fallocate() may migrate segment which is just allocated by a log, the log will update segment type in its in-memory structure, however GC will get segment type from on-disk SSA block, once segment type changes by log, we can detect such inconsistency, then shutdown filesystem. In this case, on-disk SSA shows type of segno #173822 is 1 (SUM_TYPE_NODE), however segno #173822 was just allocated as data type segment, so in-memory SIT shows type of segno #173822 is 0 (SUM_TYPE_DATA). Change as below to fix this issue: - check whether current section is empty before gc - add sanity checks on do_garbage_collect() to avoid any race case, result in migrating segment used by log. - btw, it fixes misc issue in printed logs: "SSA and SIT" -> "SIT and SSA".

Gravité et risque d'exploitation

CVE-2025-40150 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.26 %, ce qui la place devant 17.2 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions 6.9, <=6.12.*, 6.12.78, 6.17.3, <db489778e6f2a4034c2cd26fadda2796eba24dcd, 0, 6.18, <6.6.130, <=6.6.*, 40d76c393cca83938b11eb7ca8983aa3cd0ed69b, 6.6.33, 9703d69d9d153bb230711d0d577454552aeb13d4, <=*, <d625a2b08c089397d3a03bff13fa8645e4ec7a01, <=6.17.*, <6.9, <25d2dc669f2a7e48b335d1cb07139f2ffc9fe5df, 6.6.130, <eec1589be36fcf7440755703e4faeee2c01e360b) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références