MEDIUM 5.3 Microsoft

CVE-2026-22693

Null Pointer Dereference in SubtableUnicodesCache::create leading to DoS

Microsoft Security Update 2026-Jan: Null Pointer Dereference in SubtableUnicodesCache::create leading to DoS

Affected Products

azl3 harfbuzz 8.3.0-4 on Azure Linux 3.0
azl3 harfbuzz 8.3.0-3 on Azure Linux 3.0
cbl2 harfbuzz 3.4.0-3 on CBL Mariner 2.0
cbl2 qt5-qtbase 5.12.11-19 on CBL Mariner 2.0
azl3 qtbase 6.6.3-4 on Azure Linux 3.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-22693
https://nvd.nist.gov/vuln/detail/CVE-2026-22693

Published: 2026-01-13 · Source: Microsoft · Feed updated: 2026-08-04

This medium severity vulnerability with a CVSS score of 5.3 was published on 2026-01-13 via Microsoft. Affected: azl3 harfbuzz 8.3.0-4 on Azure Linux 3.0, azl3 harfbuzz 8.3.0-3 on Azure Linux 3.0, cbl2 harfbuzz 3.4.0-3 on CBL Mariner 2.0 and 2 more.

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