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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.

PUBLISHED Reserved 2025-04-16 | Published 2025-10-30 | Updated 2025-12-01 | Assigner Linux

Product status

Default status
unaffected

eb5dfcb9e36d0e46089fec777d911313c1876fa3 (git) before b8a69e3b1a460bf5d96dd53cbd121aa2cd346886
affected

eb5dfcb9e36d0e46089fec777d911313c1876fa3 (git) before a375246fcf2bbdaeb1df7fa7ee5a8b884a89085e
affected

Default status
affected

6.15
affected

Any version before 6.15
unaffected

6.17.5 (semver)
unaffected

6.18 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/b8a69e3b1a460bf5d96dd53cbd121aa2cd346886

git.kernel.org/...c/a375246fcf2bbdaeb1df7fa7ee5a8b884a89085e

cve.org (CVE-2025-40089)

nvd.nist.gov (CVE-2025-40089)

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Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.