SUSE · security update for kernel
Affects SUSESource GCVE Database
Not known to be exploited : upgrade to 9.8 or 9.6 when convenient.
Data as of 25 Oct 2026, 19:02 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 9.8, 9.6
Exploitation evidence
Disclosed: evidence found.
CVE published 14 Jul 2025
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 2026-10-25.
What to do
Upgrade redhat/kernel to 9.8 or 9.6.
Affected software
| Product | 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 security update is available from Red Hat for affected versions of Red Hat Enterprise Linux 9 and related products. Users should apply the update as described in the Red Hat advisory RHSA-2025:10837 and reboot their systems to ensure the fix is active.
Description
A security update addresses an out-of-bounds vulnerability in the Linux kernel's x86 microcode for AMD processors on systems with CPU-less NUMA nodes (CVE-2025-21991). This vulnerability has been rated as moderate severity by Red Hat. The issue affects Red Hat Enterprise Linux 9 and related variants. A patch is available and should be applied, followed by a system reboot to activate the fix.
References
- access.redhat.com/errata/RHSA-2025:10837 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2356917 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_10837.json (opens in a new tab)
- suse.com/support/security/rating/ (opens in a new tab)
- ftp.suse.com/pub/projects/security/csaf/rhsa-2025_10837.json (opens in a new tab)
- lists.suse.com/pipermail/suse-liberty-linux-updates/2025-July/001797.html (opens in a new tab)
- suse.com/security/cve/CVE-2025-21991/ (opens in a new tab)