Red Hat Security Advisory: kernel security update
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 29 Oct 2026, 10:36 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 19% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 26 Mar 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 29 Oct 2026.
What to do
AI-suggested
Red Hat has released an updated kernel package that fixes this vulnerability. Users of Red Hat Enterprise Linux 8.2 should apply the kernel update as described in the Red Hat advisory and reboot their systems to ensure the fix takes effect. No additional mitigation steps are indicated by the vendor.
Description
A security vulnerability (CVE-2025-21785) in the Linux kernel's arm64 cacheinfo component could cause an out-of-bounds write to the cacheinfo array. This flaw affects Red Hat Enterprise Linux 8.2 and is rated as having an important security impact by Red Hat. A kernel update addressing this issue is available and requires a system reboot to take effect.