CVE-2026-80620: Linux kernel · Revert "PCI/MSI: Unmap MSI-X region on error
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 7.0.0-1014.14~24.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 17:16 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.
- Patch
- Available – fixed in 7.0.0-1014.14~24.04.1, 7.0.0-1017.17~24.04.1, 7.0.0-1016.16~24.04.1 +11
Exploitation evidence
Disclosed: evidence found.
CVE published 28 Aug 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
Upgrade to a fixed release listed under Affected software.
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 patch is available that reverts the problematic commit causing the double unmap. Users should apply the official Linux kernel updates that include this fix. The vendor advisory confirms this fix is included in updated kernel packages. No additional mitigation is required beyond applying the official patch.
Description
A vulnerability in the Linux kernel related to PCI/MSI interrupt handling was resolved by reverting a commit that caused a double unmap of the MSI-X region on error paths. The issue involved calling iounmap() on a NULL pointer, which could lead to kernel warnings or crashes. This was observed on Intel Emerald Rapids CPUs during specific kernel self-tests. The fix restores the original error handling to avoid the double unmap. Multiple Linux kernel versions are affected.
References
- nvd.nist.gov/vuln/detail/CVE-2026-80620 (opens in a new tab)
- git.kernel.org/stable/c/0a2aeb02894b839ecc3ece6dc7e5c3d6c3def16f (opens in a new tab)
- git.kernel.org/stable/c/3691a82be2095abaf3326a1cbf7b25858a1d959c (opens in a new tab)
- git.kernel.org/stable/c/6848ca381edff84f87dd1b6973848c271541e813 (opens in a new tab)
- git.kernel.org/stable/c/82e120a7dd566c476ba923d30e3fb78e8118a1dd (opens in a new tab)
- git.kernel.org/stable/c/f64e03da0d83cb173743888bff4a7e61476a8fc2 (opens in a new tab)
- git.kernel.org/stable/c/f79519f636059b007d6abc91652f36dea4f54a20 (opens in a new tab)
- ubuntu.com/security/CVE-2026-80620 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-80620 (opens in a new tab)
- git.kernel.org/linus/f64e03da0d83cb173743888bff4a7e61476a8fc2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8889-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-3 (opens in a new tab)