CVE-2025-38610
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 ]
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 5.16 | 6.1.148 |
| linux / linux_kernel | 6.2 | 6.6.102 |
| linux / linux_kernel | 6.7 | 6.12.42 |
| linux / linux_kernel | 6.13 | 6.15.10 |
| linux / linux_kernel | 6.16 | 6.16.1 |
| debian / debian_linux | 11.0 | 11.0.x |
- 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
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