Kernel LPE affects Linux platforms broadly; potential root on many servers.
CVE-2026-45253
Kernel privilege escalation via ptrace param validation bug allows local code execution.
Is CVE-2026-45253 being exploited?
Not confirmed. CVE-2026-45253 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.20% probability of exploitation in the next 30 days.
How severe is CVE-2026-45253?
CVE-2026-45253 is rated High with a CVSS score of 8.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-45253?
Yes. A fix has been recorded for CVE-2026-45253. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-45253 affect?
CVE-2026-45253 affects Linux kernel. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-45253?
Patch when released; apply mitigations and least privilege.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unprivileged local user can trigger arbitrary kernel code execution and escalate to root.
Patch when available
- affected>= 15.0-RELEASE and < p9
- affected>= 14.4-RELEASE and < p5
- affected>= 14.3-RELEASE and < p14
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.