CVE-2026-99215: Linux kernel · power: supply: core: prevent unregistering a power supply while a callback runs
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 29 Oct 2026, 22:37 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 28 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10linuxpkg:deb/ubuntu/linux?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-oraclepkg:deb/ubuntu/linux-oracle?arch=source&distro=stonkingOther 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 fix is available that adds synchronization to prevent unregistering a power supply while callbacks are running. Users should update to patched kernel versions to mitigate this issue. No additional mitigation steps are indicated.
Description
A use-after-free vulnerability in the Linux kernel power supply core was resolved by preventing unregistering a power supply while a callback is running. The issue occurs when a power supply is unregistered while its callback, triggered by events such as external_power_changed(), is still executing. This can lead to accessing freed driver data and cause kernel crashes. The fix introduces a read-write semaphore to synchronize the unregister operation with ongoing callbacks, preventing premature freeing of resources.
References
- ubuntu.com/security/CVE-2026-99215 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-99215 (opens in a new tab)
- git.kernel.org/stable/c/2ac0256a28e15c4888fa394d1fe66cf7b1d58090 (opens in a new tab)
- git.kernel.org/stable/c/5b4bd13e0552926648a46c2c9a12a24dfaee3715 (opens in a new tab)
- git.kernel.org/stable/c/45388e50d14bc161873b14b9a05d4b8b8822fca6 (opens in a new tab)