CVE-2026-53362: in the CISA KEV catalogue
Linux Kernel Unspecified Vulnerability. CISA added CVE-2026-53362 to the Known Exploited Vulnerabilities catalogue on 2026-08-27 with a default due date of 2026-08-30. Known ransomware campaign use: Unknown. Forensic triage flag: Yes.
Linux Kernel contains an unspecified vulnerability that can allow for privilege escalation via IPv6 networking subsystem. This vulnerability can impact multiple products, including but not limited to Suse, Red Hat, and other products using Linux. (CISA description)
- Vendor / product
- Linux Kernel
- CWE
- Not listed
- CISA required action
- 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 evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- EPSS
- 0.71%, percentile 53 (scored 2026-11-04)
EPSS puts about 7.1 in 1,000 odds (0.71%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 53% of scored CVEs. Most CVEs score under 1%, so a high percentile can sit on a small probability: read the percentage first.
Vendor and reference links (from CISA)
- https://git.kernel.org/stable/c/14200d435af9a9eeb444f529fc2f689a236b7962
- https://git.kernel.org/stable/c/65fb14cbebb0cd0eff903a22d33537ddc8b95769
- https://git.kernel.org/stable/c/46f201f8b4c39633a1fa3dc12459f506d470993d
- https://git.kernel.org/stable/c/6374fb9edf72c67a118a2c214a0dddd04c921e0a
- https://git.kernel.org/stable/c/e9eacf19281ea2498b36291b56c9606118c2d74e
- https://git.kernel.org/stable/c/736b380e28d0480c7bc3e022f1950f31fe53a7c5
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2026-53362 in the CISA KEV catalogue?
Yes. CISA added CVE-2026-53362 (Linux Kernel Unspecified Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2026-08-27. CISA's default due date for it is 2026-08-30.
Is CVE-2026-53362 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2026-53362. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2026-53362?
CISA's required action: 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 evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2026-53362