CVE-2026-80939: Linux kernel · wifi: rtw89: pci: add .shutdown callback to stop rfkill polling on reboot
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
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 11 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 by adding a .shutdown callback to the rtw89 PCI driver to stop rfkill polling during reboot. Users should update to a kernel version that includes this patch to prevent kernel panics on arm64 platforms. Patch status is not explicitly stated but the vulnerability is resolved in the Linux kernel source. Check the vendor or distribution advisory for the exact fixed kernel versions and apply updates accordingly.
Description
A vulnerability in the Linux kernel's rtw89 PCI wifi driver caused arm64 platforms to panic with an asynchronous SError during warm reboot. The issue arose because the driver lacked a .shutdown callback to stop rfkill polling, leading to MMIO reads on a non-responding device after PCIe link teardown. The fix adds a .shutdown callback that sets a flag to prevent further polling after shutdown begins, preventing the SError panic.
References
- nvd.nist.gov/vuln/detail/CVE-2026-80939 (opens in a new tab)
- git.kernel.org/stable/c/667c12782aaf8dd3cb2213e528fe63a73cb63345 (opens in a new tab)
- git.kernel.org/stable/c/c1f214dd1351244156deb57761b14190a233aef6 (opens in a new tab)
- ubuntu.com/security/CVE-2026-80939 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-80939 (opens in a new tab)
- git.kernel.org/linus/667c12782aaf8dd3cb2213e528fe63a73cb63345 (opens in a new tab)
- git.kernel.org/stable/c/9693980cd7d2f5b17e5ef5922b922f2e1a770fca (opens in a new tab)
- git.kernel.org/stable/c/dfe2b5b2056918d186ad890079a9e7ec1898429a (opens in a new tab)