CVE-2025-21631
A local attacker can exploit multiple vulnerabilities in the Linux Kernel to carry out a denial-of-service attack or cause other unspecified impacts.
CSIRTS triage
- What
- Multiple vulnerabilities allow a local attacker to carry out a Denial of Service attack or cause other unspecified impacts.
- Who is affected
- Local users of the Linux Kernel.
- Urgency
- Remediation is important due to the potential for Denial of Service and other impacts, although exploitation has not been reported.
- Action
- Apply the latest security updates to the Linux Kernel.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch CVE-2025-21631
Get an email if CVE-2025-21631 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.
Exploitation outlook
- Low exploitation risk0.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all EPSS-scored CVEs.
Advisory coverage (1)
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund · 2026-07-02
External references
Embed the live status
— this badge updates automatically when the KEV or exploit status changes. How to embed it →
[](https://www.csirts.com/cve/CVE-2025-21631)