CVE-2026-89797: Linux kernel · power: supply: ab8500_fg: fix use-after-free on remove
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 14:05 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 16 Sep 2026
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
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther 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 has been implemented in the Linux kernel to address this vulnerability by changing the cleanup order and disabling work items properly. Users should apply the official kernel updates that include this fix. Patch status is confirmed by the advisory indicating the vulnerability has been resolved. No additional mitigation steps are required beyond applying the updated kernel versions.
Description
A use-after-free vulnerability was identified and resolved in the Linux kernel's power supply driver ab8500_fg. The issue occurred because the driver destroyed its workqueue during removal while interrupt handlers were still active, potentially allowing queued work on a freed workqueue. The fix involved changing the cleanup order to ensure interrupts are freed before the workqueue is destroyed, preventing handlers from queuing work on freed memory.
References
- ubuntu.com/security/CVE-2026-89797 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-89797 (opens in a new tab)
- git.kernel.org/linus/75b1e88d34254f4fb7753345e21bfee47abddd7f (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-89797 (opens in a new tab)
- git.kernel.org/stable/c/013731074ab6a8d11ec209eee64c5b2656954479 (opens in a new tab)
- git.kernel.org/stable/c/75b1e88d34254f4fb7753345e21bfee47abddd7f (opens in a new tab)
- git.kernel.org/stable/c/c2ce9b8f325f522e10e4d262b37ae49deb83e79b (opens in a new tab)
- git.kernel.org/stable/c/c660c017dec1fd7cd88e1103c5ae1aae6ce636bf (opens in a new tab)