CVE-2025-38131: Linux kernel · coresight: prevent deactivate active config while enabling the config
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 7.8 High · fixed in 6.8.0-1046.49~22.04.1 : patch Linux kernel soon.
Data as of 26 Oct 2026, 13:47 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 6.8.0-1046.49~22.04.1, 6.8.0-1051.57~22.04.1, 6.8.0-1047.50~22.04.2 +30
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 3 Jul 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 25.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde@6.17.0-1017.17?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinuxpkg:deb/ubuntu/linux@6.8.0-100.100?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-awspkg:deb/ubuntu/linux-aws@6.8.0-1046.49?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-aws-6.14pkg:deb/ubuntu/linux-aws-6.14@6.14.0-1013.13~24.04.1?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure@6.8.0-1046.52?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-azure-6.11pkg:deb/ubuntu/linux-azure-6.11@6.11.0-1018.18~24.04.1?arch=source&distro=nobleOther 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 should be applied promptly. The vulnerability is fixed by updating to the patched Linux kernel versions as provided by the vendor. The Ubuntu security advisory USN-7769-1 confirms the availability of fixes in the linux-hwe-edge kernel. Users should update their systems to the fixed kernel versions to mitigate this issue.
Description
A use-after-free vulnerability in the Linux kernel's coresight subsystem was resolved. The flaw allowed deactivation of an active configuration via the configfs sysfs interface while enabling the config, potentially leading to use-after-free conditions during module unload. This issue was addressed by implementing a reference counting mechanism on the config descriptor to prevent premature freeing. The vulnerability affects specific linux-hwe-edge kernel versions. A fix is available as part of a broader Linux kernel security update.
References
- ubuntu.com/security/CVE-2025-38131 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-38131 (opens in a new tab)
- git.kernel.org/linus/408c97c4a5e0b634dcd15bf8b8808b382e888164 (opens in a new tab)
- git.kernel.org/stable/c/31028812724cef7bd57a51525ce58a32a6d73b22 (opens in a new tab)
- git.kernel.org/stable/c/408c97c4a5e0b634dcd15bf8b8808b382e888164 (opens in a new tab)
- git.kernel.org/stable/c/b3b4efa2e623aecaebd7c9b9e4171f5c659e9724 (opens in a new tab)
- git.kernel.org/stable/c/dfe8224c9c7a43d356eb9f74b06868aa05f90223 (opens in a new tab)
- git.kernel.org/stable/c/ed42ee1ed05ff2f4c36938379057413a40c56680 (opens in a new tab)
- ubuntu.com/security/notices/USN-7769-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7770-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7771-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7769-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7769-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-7789-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7789-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8028-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8028-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8031-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8028-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8028-4 (opens in a new tab)