CVE-2026-97533: Linux kernel · x86/mm/pat: Acquire init_mm read lock on attribute changes to avoid UAF
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 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.
Exploitation evidence
Disclosed: evidence found.
CVE published 25 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 race condition by adding appropriate locking. Users should apply the official kernel updates that include this patch. Since this is a kernel-level vulnerability, upgrading to a patched kernel version is the recommended mitigation.
Description
A use-after-free vulnerability in the Linux kernel's x86 memory management subsystem was resolved by adding a read lock on init_mm during attribute changes to prevent race conditions. The flaw involved a race between attribute changes and CPA collapse, which could free a page table entry while it was still in use. The fix introduces locking around the entire operation except during page table allocation to avoid deadlocks. This vulnerability affects specific versions of the linux-hwe-edge kernel and was reported by Denis V. Lunev.
References
- ubuntu.com/security/CVE-2026-97533 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-97533 (opens in a new tab)
- git.kernel.org/stable/c/cc73b2043d106b467accd38e9b1fc09e0607c056 (opens in a new tab)
- git.kernel.org/stable/c/d5d8b8662e6e5a565b47a0388640e88402f23274 (opens in a new tab)
- git.kernel.org/stable/c/e21a9ea81426a85fdb0cdcfcc99d5d9c16b402ab (opens in a new tab)