CRITICAL 9.8 Microsoft
CVE-2026-31657
batman-adv: hold claim backbone gateways by reference
Microsoft Security Update 2026-Apr: batman-adv: hold claim backbone gateways by reference
Affected Products
- azl3 kernel 6.6.130.1-3 on Azure Linux 3.0
- cbl2 kernel 5.15.202.1-1 on CBL Mariner 2.0
- azl3 kernel 6.6.134.1-2 on Azure Linux 3.0
- cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-31657
- https://nvd.nist.gov/vuln/detail/CVE-2026-31657
This critical severity vulnerability with a CVSS score of 9.8 was published on 2026-04-14 via Microsoft. Affected: azl3 kernel 6.6.130.1-3 on Azure Linux 3.0, cbl2 kernel 5.15.202.1-1 on CBL Mariner 2.0, azl3 kernel 6.6.134.1-2 on Azure Linux 3.0 and 1 more.
Risk Timeline
CVE Disclosed2026-04-14 · 207 days ago
Remediation Resources
Official Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-31657NVD / MITRE
nvd.nist.gov/vuln/detail/CVE-2026-31657Related Vulnerabilities
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