CRITICAL 9.8 Microsoft

CVE-2025-37879

9p/net: fix improper handling of bogus negative read/write replies

Microsoft Security Update 2025-May: 9p/net: fix improper handling of bogus negative read/write replies

Affected Products

azl3 kernel 6.6.92.2-1 on Azure Linux 3.0
azl3 kernel 6.6.85.1-4 on Azure Linux 3.0
cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0
cbl2 kernel 5.15.200.1-1 on CBL Mariner 2.0
cbl2 kernel 5.15.202.1-1 on CBL Mariner 2.0
cbl2 kernel 5.15.202.1-1
cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0

References

Published: 2025-05-13 · Source: Microsoft · Feed updated: 2026-09-24

This critical severity vulnerability with a CVSS score of 9.8 was published on 2025-05-13 via Microsoft. Affected: azl3 kernel 6.6.92.2-1 on Azure Linux 3.0, azl3 kernel 6.6.85.1-4 on Azure Linux 3.0, cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 and 4 more.

Risk Timeline

CVE Disclosed2025-05-13 · 498 days ago

Remediation Resources

Official Advisory

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-37879

NVD / MITRE

nvd.nist.gov/vuln/detail/CVE-2025-37879

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