CVE-2026-98649: Linux kernel · KVM: s390: Fix race in _destroy_pages_crste()
Affects Linux kernelSource CVE Database V5
Not known to be exploited : upgrade to 90bd832b2bc367991d424d847003ce345b454ffc or 4ca00a9154f998116fba9a32cce5bd938d228065 when convenient.
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 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 90bd832b2bc367991d424d847003ce345b454ffc, 4ca00a9154f998116fba9a32cce5bd938d228065
Exploitation evidence
Disclosed: evidence found.
CVE published 18 Oct 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 Linux kernel to 90bd832b2bc367991d424d847003ce345b454ffc or 4ca00a9154f998116fba9a32cce5bd938d228065.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
Red Hatredhat/kernelpkg:rpm/redhat/kernelOther 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 has been applied in the Linux kernel commits identified by hashes 90bd832b2bc367991d424d847003ce345b454ffc and 4ca00a9154f998116fba9a32cce5bd938d228065. Users should update to the fixed kernel versions to remediate this issue. Since this is a kernel-level fix, applying the official kernel update is the recommended mitigation.
Description
A race condition vulnerability in the Linux kernel's KVM s390 architecture implementation was fixed by using READ_ONCE() in the _destroy_pages_crste() function to prevent multiple dereferences of a pointer. This fix addresses a concurrency issue that could potentially lead to unstable behavior in the kernel's memory management for this architecture.