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CVE-2025-39835

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, <=6.12.*, <=6.16.*, 6.17, 0, <ae668cd567a6a7622bc813ee0bb61c42bed61ba7, <157ddfb05961c68ab7d457a462822a698e4e4bf4, 07120f1abdff80f3d1351f733661abe28d609535, <=5.10.*, <=6.6.*, 6.16.5, <dcdf36f1b67884c722abce9b8946e34ffb9f67c8, <39fc2742ca14f7fbc621ce9b43bcbd00248cb9a8, 5.10.242, <90bae69c2959c39912f0c2f07a9a7894f3fc49f5, 5.15.191, 6.12.45, 5.9, <5.9, <=*, <e358d4b6225e4c1eb208686a05e360ef8df59e07, <=5.15.*, <d3cc7476b89fb45b7e00874f4f56f6b928467c60, 6.6.104, 6.1.150

Description

In the Linux kernel, the following vulnerability has been resolved: xfs: do not propagate ENODATA disk errors into xattr code ENODATA (aka ENOATTR) has a very specific meaning in the xfs xattr code; namely, that the requested attribute name could not be found. However, a medium error from disk may also return ENODATA. At best, this medium error may escape to userspace as "attribute not found" when in fact it's an IO (disk) error. At worst, we may oops in xfs_attr_leaf_get() when we do: error = xfs_attr_leaf_hasname(args, &bp); if (error == -ENOATTR) { xfs_trans_brelse(args->trans, bp); return error; } because an ENODATA/ENOATTR error from disk leaves us with a null bp, and the xfs_trans_brelse will then null-deref it. As discussed on the list, we really need to modify the lower level IO functions to trap all disk errors and ensure that we don't let unique errors like this leak up into higher xfs functions - many like this should be remapped to EIO. However, this patch directly addresses a reported bug in the xattr code, and should be safe to backport to stable kernels. A larger-scope patch to handle more unique errors at lower levels can follow later. (Note, prior to 07120f1abdff we did not oops, but we did return the wrong error code to userspace.)

Gravité et risque d'exploitation

CVE-2025-39835 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 0.17 %, ce qui la place devant 6.1 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <=6.12.*, <=6.16.*, 6.17, 0, <ae668cd567a6a7622bc813ee0bb61c42bed61ba7, <157ddfb05961c68ab7d457a462822a698e4e4bf4, 07120f1abdff80f3d1351f733661abe28d609535, <=5.10.*, <=6.6.*, 6.16.5, <dcdf36f1b67884c722abce9b8946e34ffb9f67c8, <39fc2742ca14f7fbc621ce9b43bcbd00248cb9a8, 5.10.242, <90bae69c2959c39912f0c2f07a9a7894f3fc49f5, 5.15.191, 6.12.45, 5.9, <5.9, <=*, <e358d4b6225e4c1eb208686a05e360ef8df59e07, <=5.15.*, <d3cc7476b89fb45b7e00874f4f56f6b928467c60, 6.6.104, 6.1.150) 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

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