Riskcovery

CVE-2025-40089

cxl/features: Add check for no entries in cxl_feature_info

State
Published
Severity
Not scored
Published
Oct 30, 2025
Updated
May 11, 2026
Reserved
Apr 16, 2025

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

cxl/features: Add check for no entries in cxl_feature_info

cxl EDAC calls cxl_feature_info() to get the feature information and if the hardware has no Features support, cxlfs may be passed in as NULL.

[ 51.957498] BUG: kernel NULL pointer dereference, address: 0000000000000008 [ 51.965571] #PF: supervisor read access in kernel mode [ 51.971559] #PF: error_code(0x0000) - not-present page [ 51.977542] PGD 17e4f6067 P4D 0 [ 51.981384] Oops: Oops: 0000 [#1] SMP NOPTI [ 51.986300] CPU: 49 UID: 0 PID: 3782 Comm: systemd-udevd Not tainted 6.17.0dj test+ #64 PREEMPT(voluntary) [ 51.997355] Hardware name: <removed> [ 52.009790] RIP: 0010:cxl_feature_info+0xa/0x80 [cxl_core]

Add a check for cxlfs before dereferencing it and return -EOPNOTSUPP if there is no cxlfs created due to no hardware support.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • eb5dfcb9e36d0e46089fec777d911313c1876fa3 to before b8a69e3b1a460bf5d96dd53cbd121aa2cd346886Affected
  • eb5dfcb9e36d0e46089fec777d911313c1876fa3 to before a375246fcf2bbdaeb1df7fa7ee5a8b884a89085eAffected
LinuxLinux
  • 6.15Affected
  • before 6.15Not affected
  • 6.17.5 through 6.17.*Not affected
  • 6.18 and laterNot affected

References

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