CVE-2026-80940: Linux kernel · wifi: rtw88: pci: fix resource leak on failed NAPI setup
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 to address this resource leak by adding proper cleanup on NAPI setup failure. Users should update to the fixed kernel version once available. Since this is a kernel-level resource management bug, applying the official kernel patch or upgrading to a kernel version containing this fix is the recommended mitigation.
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: rtw88: pci: fix resource leak on failed NAPI setup rtw_pci_probe() allocates PCI resources through rtw_pci_setup_resource() before it sets up NAPI. If rtw_pci_napi_init() fails, the error path jumps straight to err_pci_declaim and skips rtw_pci_destroy(), leaving the PCI resources allocated by rtw_pci_setup_resource() behind. Add a dedicated cleanup label for the NAPI setup failure path so probe destroys the PCI resources. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing current mainline kernels. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1-rc7. An x86_64 allyesconfig build showed no new warnings. As we do not have a suitable rtw88 PCI board to test with, no runtime testing was able to be performed.
References
- nvd.nist.gov/vuln/detail/CVE-2026-80940 (opens in a new tab)
- git.kernel.org/stable/c/34a505071d1ffc5ebf3dc3cd16d2a12b044bcc84 (opens in a new tab)
- git.kernel.org/stable/c/481fff9bda01720c70b19fb260808145a3f21594 (opens in a new tab)
- git.kernel.org/stable/c/b1596e212ab1739930b25b9d3daf6b5cd307b537 (opens in a new tab)
- git.kernel.org/stable/c/e779df4806cd29cbcca5c9dc0a1073662c76b889 (opens in a new tab)
- ubuntu.com/security/CVE-2026-80940 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-80940 (opens in a new tab)
- git.kernel.org/linus/e779df4806cd29cbcca5c9dc0a1073662c76b889 (opens in a new tab)