CISA adds Linux Kernel improper check flaw CVE-2025-39682 to KEV catalog on evidence of active exploitation
CISA added one vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog on 2026-09-18 based on evidence of active exploitation: CVE-2025-39682, an Improper Check for Unusual or Exceptional Conditions flaw in the Linux Kernel. CISA describes this vulnerability type as a frequent attack vector for malicious cyber actors and a significant risk to the federal enterprise. The alert gives no technical details, affected versions, exploitation specifics or attribution.
The alert also references BOD 26-04, which requires FCEB agencies to prioritize rapid remediation of KEV-listed CVEs on publicly exposed assets that grant total control after exploitation. It further sets expectations for checking whether threat actors compromised a system before the patch was applied. CISA encourages all organizations to adopt risk-based vulnerability management and prioritize KEV remediation.
Detalhes técnicos
- CVE-2025-39682: Linux Kernel, Improper Check for Unusual or Exceptional Conditions (CWE-754 class as named by CISA).
- The article does not name affected kernel versions, exploitation methods, IOCs or threat actors.
Remediação
- Prioritize remediation of CVE-2025-39682 on Linux systems, especially publicly exposed assets.
- Consult the Linux kernel and distribution vendor advisories for affected versions and patches; the CISA alert does not list them.
- Per BOD 26-04, check whether systems were compromised before the patch was applied.
Linha do tempo
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CISA adds Linux Kernel improper check flaw CVE-2025-39682 to KEV catalog on evidence of active exploitation
ler a análise desta fonte ocultar
CISA added one vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog on 2026-09-18 based on evidence of active exploitation: CVE-2025-39682, an Improper Check for Unusual or Exceptional Conditions flaw in the Linux Kernel. CISA describes this vulnerability type as a frequent attack vector for malicious cyber actors and a significant risk to the federal enterprise. The alert gives no technical details, affected versions, exploitation specifics or attribution.
The alert also references BOD 26-04, which requires FCEB agencies to prioritize rapid remediation of KEV-listed CVEs on publicly exposed assets that grant total control after exploitation. It further sets expectations for checking whether threat actors compromised a system before the patch was applied. CISA encourages all organizations to adopt risk-based vulnerability management and prioritize KEV remediation.
Technical Details
- CVE-2025-39682: Linux Kernel, Improper Check for Unusual or Exceptional Conditions (CWE-754 class as named by CISA).
- The article does not name affected kernel versions, exploitation methods, IOCs or threat actors.
Remediation
- Prioritize remediation of CVE-2025-39682 on Linux systems, especially publicly exposed assets.
- Consult the Linux kernel and distribution vendor advisories for affected versions and patches; the CISA alert does not list them.
- Per BOD 26-04, check whether systems were compromised before the patch was applied.