MEDIUM 5.3 Microsoft
CVE-2026-34743
XZ Utils: Buffer overflow in lzma_index_append()
Microsoft Security Update 2026-Apr: XZ Utils: Buffer overflow in lzma_index_append()
Affected Products
- azl3 xz 5.4.4-2 on Azure Linux 3.0
- cbl2 cmake 3.21.4-23 on CBL Mariner 2.0
- cbl2 xz 5.2.5-1 on CBL Mariner 2.0
- azl3 rust 1.75.0-27 on Azure Linux 3.0
- cbl2 rust 1.72.0-15 on CBL Mariner 2.0
- azl3 rust 1.90.0-6 on Azure Linux 3.0
- azl3 xz 5.4.4-3 on Azure Linux 3.0
- cbl2 cmake 3.21.4-23
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34743
- https://nvd.nist.gov/vuln/detail/CVE-2026-34743
This medium severity vulnerability with a CVSS score of 5.3 was published on 2026-04-14 via Microsoft. Affected: azl3 xz 5.4.4-2 on Azure Linux 3.0, cbl2 cmake 3.21.4-23 on CBL Mariner 2.0, cbl2 xz 5.2.5-1 on CBL Mariner 2.0 and 5 more.
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