CVE-2026-68081: Linux kernel · KVM: nVMX: Put vmcs12 pages if nested VM-Enter fails due to invalid guest state
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 7.0.0-1014.14~24.04.1 : patch Linux kernel soon.
Data as of 26 Oct 2026, 17:16 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 4% 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 8 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 and should be applied to affected Linux kernel versions. Users should update their systems to the fixed kernel versions provided by their Linux distribution vendors. After updating, a system reboot is required to apply the changes. No additional mitigation steps are indicated by the vendor advisory.
Description
A vulnerability in the Linux kernel's KVM nested virtualization (nVMX) implementation could lead to resource leaks when nested VM-Enter fails due to invalid guest state. Specifically, vmcs12 pages are not properly released if KVM synthesizes a nested VM-Exit under these conditions, potentially leaking pinned pages or mappings if the hypervisor retries VMLAUNCH or VMRESUME. This issue has been resolved in updated Linux kernel versions.
References
- nvd.nist.gov/vuln/detail/CVE-2026-68081 (opens in a new tab)
- git.kernel.org/stable/c/2c87a087c20632d68920272173b5d7c47f9bcf70 (opens in a new tab)
- git.kernel.org/stable/c/2f2312c422fd2695da772cecb30c69994b795964 (opens in a new tab)
- git.kernel.org/stable/c/7996013b85687034d2e820cef94d6404192e3a3d (opens in a new tab)
- msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-68081.json (opens in a new tab)
- support.microsoft.com/lifecycle (opens in a new tab)
- first.org/cvss (opens in a new tab)
- ubuntu.com/security/CVE-2026-68081 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-68081 (opens in a new tab)
- suse.com/support/security/rating/ (opens in a new tab)
- ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11506-1.json (opens in a new tab)
- suse.com/security/cve/CVE-2026-68081/ (opens in a new tab)
- suse.com/security/cve/CVE-2026-68082/ (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)
- git.kernel.org/stable/c/a7bf4f5b19965e4466040ad6b24919c1ed326a84 (opens in a new tab)
- git.kernel.org/stable/c/f42669f931a6f45e5918cf5e99989b9a6c65e655 (opens in a new tab)