CVE-2025-38610
Published: August 21, 2025Last modified: August 21, 2025
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 ]
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.151-r0) |
| 25 LTS | linux-lts | Fixed (6.12.44-r0) | |
| Stream | linux-lts | Fixed (6.12.43-r0) |
References
- https://git.kernel.org/stable/c/27914f2b795e2b58e9506f281dcdd98fef09d3c2
- https://git.kernel.org/stable/c/27e0318f0ea69fcfa32228847debc384ade14578
- https://git.kernel.org/stable/c/2fd001a0075ac01dc64a28a8e21226b3d989a91d
- https://git.kernel.org/stable/c/46dc57406887dd02565cb264224194a6776d882b
- https://git.kernel.org/stable/c/8374ac7d69a57d737e701a851ffe980a0d27d3ad
- https://git.kernel.org/stable/c/c6ec27091cf5ac05094c1fe3a6ce914cf711a37c
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html