CVE-2025-68177: cpufreq/longhaul: handle NULL policy in longhaul_exit

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-16 · updated 2026-10-14

Description

In the Linux kernel, the following vulnerability has been resolved: cpufreq/longhaul: handle NULL policy in longhaul_exit longhaul_exit() was calling cpufreq_cpu_get(0) without checking for a NULL policy pointer. On some systems, this could lead to a NULL dereference and a kernel warning or panic. This patch adds a check using unlikely() and returns early if the policy is NULL. Bugzilla: #219962

Affected products

Linux kernel: 3.10 — fixed in 6.18

How to fix

Upgrade to a fixed version: Linux kernel 6.18. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/55cf586b9556863e3c2a45460aba71bcb2be5bcd
https://git.kernel.org/stable/c/592532a77b736b5153e0c2e4c74aa50af0a352ab
https://git.kernel.org/stable/c/64adabb6d9d51b7e7c02fe733346a2c4dd738488
https://git.kernel.org/stable/c/809cf2a7794ca4c14c304b349f4c3ae220701ce4
https://git.kernel.org/stable/c/8d6791c480f22d6e9a566eaa77336d3d37c5c591
https://git.kernel.org/stable/c/956b56d17a89775e4957bbddefa45cd3c6c71000
https://git.kernel.org/stable/c/b02352dd2e6cca98777714cc2a27553191df70db
https://git.kernel.org/stable/c/fd93e1d71b3b14443092919be12b1abf08de35eb

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