Microsoft security update for CVE-2026-34743
🔗 CVE IDs covered (1)
📋 Microsoft's advisory
EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34743. This page also shows what EchelonGraph holds for CVE-2026-34743, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.
🎯 Affected products11
- azl3 rust 1.75.0-27 on Azure Linux 3.0
- azl3 rust 1.90.0-6 on Azure Linux 3.0
- azl3 xz 5.4.4-2 on Azure Linux 3.0
- azl3 xz 5.4.4-3 on Azure Linux 3.0
- cbl2 cmake 3.21.4-23
- cbl2 cmake 3.21.4-23 on CBL Mariner 2.0
- cbl2 cmake 3.21.4-23 on CBL-Mariner 2.0
- cbl2 rust 1.72.0-15 on CBL Mariner 2.0
- cbl2 rust 1.72.0-15 on CBL-Mariner 2.0
- cbl2 xz 5.2.5-1 on CBL Mariner 2.0
- cbl2 xz 5.2.5-1 on CBL-Mariner 2.0
✅ Updates Microsoft lists: 6 updates
6 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.
| KB article | Update | Fixed build |
|---|---|---|
| — | Security Update | 5.4.4-3 |
| — | Security Update | 5.2.5-2 |
| — | Security Update | 1.75.0-28 |
| — | Security Update | 1.72.0-16 |
| — | Security Update | 1.90.0-7 |
| — | Security Update | — |
🧭 EchelonGraph on CVE-2026-34743
- EchelonGraph score
- 5.3 MEDIUM
- CISA KEV
- Not listed
- Fix status
- A fix is available — apply it.
Description from the CVE record (CVE.org), as published by its numbering authority
XZ Utils provide a general-purpose data-compression library plus command-line tools. Prior to version 5.8.3, if lzma_index_decoder() was used to decode an Index that contained no Records, the resulting lzma_index was left in a state where where a subsequent lzma_index_append() would allocate too little memory, and a buffer overflow would occur. This issue has been patched in version 5.8.3.
Published by GitHub, Inc., the CVE Numbering Authority that assigned CVE-2026-34743, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).