CVE-2025-68177: Linux kernel · cpufreq/longhaul: handle NULL policy in longhaul_exit
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 5.15.0-1103.110~20.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 17:16 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.15.0-1103.110~20.04.1, 5.15.0-1110.119~20.04.1, 5.15.0-1114.123~20.04.1 +70
Exploitation evidence
Disclosed: evidence found.
CVE published 16 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 25.10linuxpkg:deb/ubuntu/linux?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-oraclepkg:deb/ubuntu/linux-oracle?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch is available and has been released by Linux kernel maintainers and distributions such as Ubuntu. Systems running affected kernel versions should be updated to the fixed versions as per vendor advisories. No additional mitigation steps are required beyond applying the official kernel updates.
Description
A vulnerability in the Linux kernel's cpufreq/longhaul component was resolved. The function longhaul_exit() called cpufreq_cpu_get(0) without checking if the policy pointer was NULL, which could cause a NULL pointer dereference leading to a kernel warning or panic on some systems. The issue has been fixed by adding a check that returns early if the policy is NULL. This vulnerability affects multiple Linux kernel versions prior to specific patched releases. The fix is included in official Linux kernel updates.
References
- ubuntu.com/security/CVE-2025-68177 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-68177 (opens in a new tab)
- git.kernel.org/linus/592532a77b736b5153e0c2e4c74aa50af0a352ab (opens in a new tab)
- git.kernel.org/stable/c/55cf586b9556863e3c2a45460aba71bcb2be5bcd (opens in a new tab)
- git.kernel.org/stable/c/592532a77b736b5153e0c2e4c74aa50af0a352ab (opens in a new tab)
- git.kernel.org/stable/c/64adabb6d9d51b7e7c02fe733346a2c4dd738488 (opens in a new tab)
- git.kernel.org/stable/c/809cf2a7794ca4c14c304b349f4c3ae220701ce4 (opens in a new tab)
- git.kernel.org/stable/c/8d6791c480f22d6e9a566eaa77336d3d37c5c591 (opens in a new tab)
- git.kernel.org/stable/c/956b56d17a89775e4957bbddefa45cd3c6c71000 (opens in a new tab)
- git.kernel.org/stable/c/b02352dd2e6cca98777714cc2a27553191df70db (opens in a new tab)
- git.kernel.org/stable/c/fd93e1d71b3b14443092919be12b1abf08de35eb (opens in a new tab)
- ubuntu.com/security/notices/USN-8029-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8030-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8029-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8048-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8029-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8095-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8100-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8095-2 (opens in a new tab)