CVE-2026-89945: Linux kernel · ASoC: cs35l34: drain threaded IRQ before runtime suspend
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 11% 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 is available that disables the IRQ before entering suspend states and re-enables it only after resume restores hardware access. Users should update to kernel versions that include this fix. Since this is a kernel driver issue, applying the official kernel updates from the vendor or distribution is the recommended remediation. No additional mitigation is indicated.
Description
A vulnerability in the Linux kernel's ASoC cs35l34 driver was resolved. The issue involved the driver not properly draining the threaded IRQ before runtime suspend, allowing the IRQ handler to run after hardware access was removed. This could cause the handler to operate on invalid hardware state, potentially leading to improper device behavior during suspend. The fix ensures the IRQ is disabled before entering suspend states and re-enabled only after resume restores hardware access.
References
- ubuntu.com/security/CVE-2026-89945 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-89945 (opens in a new tab)
- git.kernel.org/linus/4105a4c0678b2808fc8046b60321b4f1cc7dae75 (opens in a new tab)
- msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-89945.json (opens in a new tab)
- support.microsoft.com/lifecycle (opens in a new tab)
- first.org/cvss (opens in a new tab)