Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability
CVE-2025-39682 Exploited
Linux Kernel contains an improper check for unusual or exceptional conditions vulnerability in the TLS receive path which allows a zero-length record retrieved from the rxlist to bypass the intended recvmsg() record-type handling, potentially causing subsequent TLS records to be processed using incorrect zero-copy and queuing assumptions. The impacted product(s) could be end-of-life (EoL) and/or end-of-service (EoS). Users are advised to discontinue use and/or transition to a supported version.
Being exploited in the wild
Catalogued 18 September 2026 · US federal remediation deadline 21 September 2026
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for…
Exploit code is also public: Public PoC
- Public PoCkhoatran107/cve-2025-396826 stars
- Public PoCsuominen/CVE-2025-39682
Assessment
- CVSS
- Not yet scored
- Severity
- Unscored
- Known exploited
- Yes — listed in the CISA KEV catalog
- Exploit availability
- CISA KEV, Public PoC
- Published
- 18 September 2026
- Last updated
- 18 September 2026
- Affected
- Linux · Kernel
- Weakness
- CWE-754
At the source
References
Query this programmatically
Agents can read this through the MCP endpoint, or over HTTP:
curl https://www.cve.zerocrew.in/api/cve/CVE-2025-39682