Red Hat Security Advisory: kernel security update
Affects Linux kernelSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited.
Data as of 29 Oct 2026, 08:27 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 13% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 28 Oct 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
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Product Security Red Hat | Affected
| Fixed in– |
AI-suggested
A security update for the kernel packages is available and should be applied promptly. The update includes the necessary fixes for CVE-2026-64507 and CVE-2026-64508. Red Hat recommends rebooting the system after applying the update for the changes to take effect. Users should follow the instructions in the Red Hat advisory and treat all kernel errata as security-relevant.
Description
Red Hat issued a moderate severity security advisory for the Linux kernel addressing two vulnerabilities related to BPF JIT hardening and x86 bug mitigations. The update includes support for hardening against JIT spraying (CVE-2026-64508) and enabling IBPB flush on BPF JIT allocation (CVE-2026-64507). These fixes improve kernel security by mitigating potential attack vectors involving the BPF Just-In-Time compiler. The update requires a system reboot to take effect and is applicable to Red Hat Enterprise Linux 10.0 Extended Update Support and related products.
References
- access.redhat.com/errata/RHSA-2026:91648 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2507153 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2507218 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_91648.json (opens in a new tab)