Description
In the Linux kernel, the following vulnerability has been resolved:
powercap: dtpm_cpu: Fix NULL pointer dereference in get_pd_power_uw()
The get_pd_power_uw() function can crash with a NULL pointer dereference when em_cpu_get() returns NULL. This occurs when a CPU becomes impossible during runtime, causing get_cpu_device() to return NULL, which propagates through em_cpu_get() and leads to a crash when em_span_cpus() dereferences the NULL pointer.
Add a NULL check after em_cpu_get() and return 0 if unavailable, matching the existing fallback behavior in __dtpm_cpu_setup().
[ rjw: Drop an excess empty code line ]
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= eb82bace893169b319c563b7f813c58a0a5a9f76, < 27914f2b795e2b58e9506f281dcdd98fef09d3c2; >= eb82bace893169b319c563b7f813c58a0a5a9f76, < c6ec27091cf5ac05094c1fe3a6ce914cf711a37c; >= eb82bace893169b319c563b7f813c58a0a5a9f76, < 8374ac7d69a57d737e701a851ffe980a0d27d3ad; >= eb82bace893169b319c563b7f813c58a0a5a9f76, < 27e0318f0ea69fcfa32228847debc384ade14578; >= eb82bace893169b319c563b7f813c58a0a5a9f76, < 2fd001a0075ac01dc64a28a8e21226b3d989a91d; >= eb82bace893169b319c563b7f813c58a0a5a9f76, < 46dc57406887dd02565cb264224194a6776d882b |
| Linux | Linux | 5.16 |
References
- https://git.kernel.org/stable/c/27914f2b795e2b58e9506f281dcdd98fef09d3c2Patch
- https://git.kernel.org/stable/c/27e0318f0ea69fcfa32228847debc384ade14578Patch
- https://git.kernel.org/stable/c/2fd001a0075ac01dc64a28a8e21226b3d989a91dPatch
- https://git.kernel.org/stable/c/46dc57406887dd02565cb264224194a6776d882bPatch
- https://git.kernel.org/stable/c/8374ac7d69a57d737e701a851ffe980a0d27d3adPatch
- https://git.kernel.org/stable/c/c6ec27091cf5ac05094c1fe3a6ce914cf711a37cPatch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlThird Party Advisory
Timeline
- Published
- Aug 19, 2025
- Last modified
- Jun 17, 2026
- NVD status
- Analyzed