CVE-2026-72280: Linux kernel · KVM: arm64: nv: Drop bogus WARN for write to ZCR_EL2
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 7.1 High · fixed in 7.0.0-1014.14~24.04.1 : patch Linux kernel soon.
Data as of 26 Oct 2026, 15:59 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 8% 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
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 15 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
An official fix is available and should be applied. Users should update to the patched Linux kernel versions as provided by their distribution. No additional mitigation is required beyond applying the update.
Description
A vulnerability in the Linux kernel's KVM arm64 nested virtualization code caused a bogus warning (WARN) when a guest wrote to the ZCR_EL2 system register alias in a nested context. This warning could trigger a hypervisor panic (hyp_panic), leading to denial of service. The issue has been resolved by removing the incorrect warning. The vulnerability affects specific Linux kernel versions and has a CVSS score of 7.1 (medium severity).
References
- nvd.nist.gov/vuln/detail/CVE-2026-72280 (opens in a new tab)
- git.kernel.org/stable/c/5000bcae71c869cba6674c326fec2d8ad659ae3a (opens in a new tab)
- git.kernel.org/stable/c/6561597dba97e3e8479a9919bda172cf43eb902c (opens in a new tab)
- git.kernel.org/stable/c/7deadbc5dab5b8e2316364603bc6281129c8461c (opens in a new tab)
- git.kernel.org/stable/c/9f1667098c6ae7ec81a9a56859cfdacb822aa0d0 (opens in a new tab)
- ubuntu.com/security/CVE-2026-72280 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-72280 (opens in a new tab)
- git.kernel.org/linus/9f1667098c6ae7ec81a9a56859cfdacb822aa0d0 (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)