Red Hat Security Advisory: kernel security update
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 29 Oct 2026, 10:37 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 41% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 13 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
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), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
AI-suggested
Red Hat has released an official security update for Red Hat Enterprise Linux 9.4 that addresses CVE-2026-53264. Users should apply the provided kernel update and reboot their systems to ensure the fix is applied. Red Hat strongly recommends not delaying this update due to the kernel's fundamental role in system security. No additional mitigation steps are specified beyond applying the official patch and rebooting.
Description
A security update for the Linux kernel in Red Hat Enterprise Linux 9.4 addresses a vulnerability identified as CVE-2026-53264. The issue involves the net/sched act_api component, where the action lifecycle did not use RCU with deferred freeing, potentially leading to unsafe memory handling. Red Hat has released patches to fix this flaw and recommends applying the update and rebooting the system to ensure the fix takes effect. This update is rated as Important by Red Hat Product Security.