CVE-2025-39835

HIGH EPSS 5.2%
Published Sep 16, 20259mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Sep 16, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

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.)

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
5.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel*≥5.9  –  <5.10.242
linuxlinux_kernel*≥5.11  –  <5.15.191
linuxlinux_kernel*≥5.16  –  <6.1.150
linuxlinux_kernel*≥6.2  –  <6.6.104
linuxlinux_kernel*≥6.7  –  <6.12.45
linuxlinux_kernel*≥6.13  –  <6.16.5
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
debiandebian_linux11.0any

References 10

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-032379.html
  • git.kernel.org https://git.kernel.org/stable/c/157ddfb05961c68ab7d457a462822a698e4e4bf4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/39fc2742ca14f7fbc621ce9b43bcbd00248cb9a8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/90bae69c2959c39912f0c2f07a9a7894f3fc49f5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ae668cd567a6a7622bc813ee0bb61c42bed61ba7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d3cc7476b89fb45b7e00874f4f56f6b928467c60
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dcdf36f1b67884c722abce9b8946e34ffb9f67c8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e358d4b6225e4c1eb208686a05e360ef8df59e07
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
    Mailing ListThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Mailing ListThird Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/157ddfb05961c68ab7d457a462822a698e4e4bf4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/39fc2742ca14f7fbc621ce9b43bcbd00248cb9a8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/90bae69c2959c39912f0c2f07a9a7894f3fc49f5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ae668cd567a6a7622bc813ee0bb61c42bed61ba7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d3cc7476b89fb45b7e00874f4f56f6b928467c60
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dcdf36f1b67884c722abce9b8946e34ffb9f67c8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e358d4b6225e4c1eb208686a05e360ef8df59e07
    Patch