Microsoft security update for CVE-2026-124317
🔗 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-2026-124317. This page also shows what EchelonGraph holds for CVE-2026-124317, 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 products6
- azl3 cmake 3.30.3-15 on Azure Linux 3.0
- azl3 expat 2.9.0-1 on Azure Linux 3.0
- azl3 python3 3.12.16-1 on Azure Linux 3.0
- azl3 python3 3.12.16-2 on Azure Linux 3.0
- azl4 expat 2.9.0-2.azl4 on Azure Linux 4.0
- azl4 python3-docs 3.14.10-2.azl4 on Azure Linux 4.0
✅ Updates Microsoft lists: 1 update
1 row: 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 | — |
🧭 EchelonGraph on CVE-2026-124317
- EchelonGraph score
- 4.8 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
libexpat through 2.10.0 contains an out-of-bounds read vulnerability in unknown_toUtf8() and unknown_toUtf16() in xmltok.c when handling application-registered unknown encodings. Attackers can supply a document ending in a truncated multibyte sequence so the convert callback reads past the parse buffer, leaking adjacent memory or crashing applications.
Published by VulnCheck, the CVE Numbering Authority that assigned CVE-2026-124317, 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).