xfs: do not propagate ENODATA disk errors into xattr code

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-39835
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-09-16 14:15:51 UTC
Updated2026-05-12 13:17:14 UTC
DescriptionIn 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.)

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 07120f1abdff80f3d1351f733661abe28d609535 157ddfb05961c68ab7d457a462822a698e4e4bf4 git Not specified
CNA Linux Linux affected 07120f1abdff80f3d1351f733661abe28d609535 90bae69c2959c39912f0c2f07a9a7894f3fc49f5 git Not specified
CNA Linux Linux affected 07120f1abdff80f3d1351f733661abe28d609535 e358d4b6225e4c1eb208686a05e360ef8df59e07 git Not specified
CNA Linux Linux affected 07120f1abdff80f3d1351f733661abe28d609535 d3cc7476b89fb45b7e00874f4f56f6b928467c60 git Not specified
CNA Linux Linux affected 07120f1abdff80f3d1351f733661abe28d609535 dcdf36f1b67884c722abce9b8946e34ffb9f67c8 git Not specified
CNA Linux Linux affected 07120f1abdff80f3d1351f733661abe28d609535 39fc2742ca14f7fbc621ce9b43bcbd00248cb9a8 git Not specified
CNA Linux Linux affected 07120f1abdff80f3d1351f733661abe28d609535 ae668cd567a6a7622bc813ee0bb61c42bed61ba7 git Not specified
CNA Linux Linux affected 5.9 Not specified
CNA Linux Linux unaffected 5.9 semver Not specified
CNA Linux Linux unaffected 5.10.242 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.191 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.150 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.104 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.45 6.12.* semver Not specified
CNA Linux Linux unaffected 6.16.5 6.16.* semver Not specified
CNA Linux Linux unaffected 6.17 * original_commit_for_fix Not specified
ADP Siemens SIMATIC CN 4100 affected V5.0 custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/dcdf36f1b67884c722abce9b8946e34ffb9f67c8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/157ddfb05961c68ab7d457a462822a698e4e4bf4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/10/msg00008.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
git.kernel.org/stable/c/e358d4b6225e4c1eb208686a05e360ef8df59e07 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ae668cd567a6a7622bc813ee0bb61c42bed61ba7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d3cc7476b89fb45b7e00874f4f56f6b928467c60 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/39fc2742ca14f7fbc621ce9b43bcbd00248cb9a8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-032379.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/90bae69c2959c39912f0c2f07a9a7894f3fc49f5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/10/msg00007.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
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