Heimdall Security Logo

CVE-2026-72160

Vulnérabilité élevée dans Linux (Linux)

CVSS 8.8 · Élevée
EPSS 0.7%
Linux•Linux•Versions : <=6.1.*, <2.6.29, 6.18.40, <4db3b6a2a8ecf2a89d26a4090ace4072c6fad050, <=6.12.*, 7.1.5, <fb024ea29f6cb1f01745e5f2e31646f3acb9aa6f, <157d31ef45038d89cd19620105e082d43c8e41e0, 0, <a5b555bcabbb0aff8745ad181768eaf9d964c1ee, <=7.1.*, 2.6.29, <82afe13558354390d8a592a5334d5f4fd72c0e5c, 6.1.178, <=5.10.*, <=6.6.*, 6.12.97, <2e3aac33988ef4e4170141db8e995693ea38357c, <=6.18.*, <5366a017099c6a3c443be908a05f26fd72af12a1, 5.15.212, 6.6.145, 5.10.261, <=*, b657c95c11088d77fc1bfc9c84d940f778bf9d12, <=5.15.*, <b858f2d57cfc9d57ce61b86051d603dc0ebccd40, 7.2

Description

In the Linux kernel, the following vulnerability has been resolved: ocfs2: reject dinodes with non-canonical i_mode type Patch series "ocfs2: harden inode validators against forged metadata", v2. This series adds three structural checks to OCFS2 dinode validation so malformed on-disk fields are rejected before ocfs2_populate_inode() copies them into the in-core inode. The checks cover: - i_mode values whose type bits do not name a canonical POSIX file type; - non-device dinodes whose id1.dev1.i_rdev field is non-zero; and - non-inline dinodes that claim non-zero i_size while i_clusters is zero, covering directories unconditionally and regular files on non-sparse volumes. The normal read path reports these through ocfs2_error(), matching the existing suballoc-slot, inline-data, chain-list, and refcount checks. The online filecheck path uses the same structural predicates but keeps its own reporting contract, returning OCFS2_FILECHECK_ERR_INVALIDINO instead of calling ocfs2_error(). This patch (of 3): ocfs2_validate_inode_block() currently accepts any non-zero i_mode value. ocfs2_populate_inode() then copies that mode verbatim into inode->i_mode and dispatches on i_mode & S_IFMT to the file/dir/symlink/special_file iops; an unrecognised type falls through to ocfs2_special_file_iops and init_special_inode(). Reject dinodes whose type bits do not name one of the seven canonical POSIX file types. Use fs_umode_to_ftype(), the same generic file-type conversion helper OCFS2 already uses for directory entries, so the accepted inode type set matches the kernel file-type vocabulary instead of open-coding a local switch. Apply the same structural check to the online filecheck read path. filecheck keeps its own error namespace, so it reports malformed i_mode through the filecheck logger and OCFS2_FILECHECK_ERR_INVALIDINO instead of calling ocfs2_error(), but it must not allow a malformed dinode to proceed into ocfs2_populate_inode().

Gravité et risque d'exploitation

CVE-2026-72160 obtient un score CVSS de 8.8/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.65 %, ce qui la place devant 50.2 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <2.6.29, 6.18.40, <4db3b6a2a8ecf2a89d26a4090ace4072c6fad050, <=6.12.*, 7.1.5, <fb024ea29f6cb1f01745e5f2e31646f3acb9aa6f, <157d31ef45038d89cd19620105e082d43c8e41e0, 0, <a5b555bcabbb0aff8745ad181768eaf9d964c1ee, <=7.1.*, 2.6.29, <82afe13558354390d8a592a5334d5f4fd72c0e5c, 6.1.178, <=5.10.*, <=6.6.*, 6.12.97, <2e3aac33988ef4e4170141db8e995693ea38357c, <=6.18.*, <5366a017099c6a3c443be908a05f26fd72af12a1, 5.15.212, 6.6.145, 5.10.261, <=*, b657c95c11088d77fc1bfc9c84d940f778bf9d12, <=5.15.*, <b858f2d57cfc9d57ce61b86051d603dc0ebccd40, 7.2) 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

Rechercher une autre CVE