linux: In the Linux kernel, the following vulnerability has been resolved: cxl/features: Add check for no entries in cxl_fe...
CVE-2025-40089 is fixed in linux on 1 platform by DEBIAN-CVE-2025-40089 (version 6.17.6-1), released October 30, 2025. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 14 | 6.17.6-1 | DEBIAN-CVE-2025-40089 | Oct 30, 2025 |
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