HIGH 7.5 Microsoft
CVE-2025-59375
libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.
Microsoft Security Update 2025-Sep: libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.
Affected Products
- cbl2 expat 2.6.4-2 on CBL Mariner 2.0
- azl3 expat 2.6.4-2 on Azure Linux 3.0
- azl3 expat 2.6.4-1 on Azure Linux 3.0
- cbl2 cmake 3.21.4-18 on CBL Mariner 2.0
- cbl2 expat 2.6.4-1 on CBL Mariner 2.0
- azl3 cmake 3.30.3-9 on Azure Linux 3.0
- cbl2 python3 3.9.19-14 on CBL Mariner 2.0
- azl3 python3 3.12.9-4 on Azure Linux 3.0
Remediation
$ sudo apt install --only-upgrade expatReferences
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59375
- https://nvd.nist.gov/vuln/detail/CVE-2025-59375
This high severity vulnerability with a CVSS score of 7.5 was published on 2025-09-09 via Microsoft. A remediation command is available below. Affected: cbl2 expat 2.6.4-2 on CBL Mariner 2.0, azl3 expat 2.6.4-2 on Azure Linux 3.0, azl3 expat 2.6.4-1 on Azure Linux 3.0 and 5 more.
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