A flaw was found in the c-ares package. The ares_set_sortlist is missing checks about the validity of the input string which allows a possible arbitrary length stack overflow. This issue may cause a denial of service or a limited impact on confidentiality and integrity.
🔗 CVE IDs covered (1)
📋 Description
Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability? One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
🎯 Affected products11
- azl3 grpc 1.42.0-7 on Azure Linux 3.0
- azl3 grpc 1.62.0-2 on Azure Linux 3.0
- cbl2 c-ares 1.19.0-1 on CBL Mariner 2.0
- cbl2 grpc 1.42.0-11 on CBL Mariner 2.0
- cbl2 nodejs 16.20.1-2 on CBL Mariner 2.0
- cbl2 python-gevent 21.1.2-3 on CBL Mariner 2.0
- cbl2 rubygem-mini_portile2 2.8.0-1 on CBL Mariner 2.0
- cm1 c-ares 1.19.0-1 on CBL Mariner 1.0
- cm1 grpc 1.35.0-9 on CBL Mariner 1.0
- cm1 nodejs 14.21.3-1 on CBL Mariner 1.0
- cm1 python-gevent 1.3.6-5 on CBL Mariner 1.0
✅ Remediation
KBCBL-Mariner Releases (Security Update) — fixed build 1.62.0-2 KBCBL-Mariner Releases (Security Update) — fixed build 1.3.6-5 KBCBL-Mariner Releases (Security Update) — fixed build 14.21.3-1 KBCBL-Mariner Releases (Security Update) — fixed build 1.35.0-9 KBCBL-Mariner Releases (Security Update) — fixed build 1.19.0-1 KBCBL-Mariner Releases (Security Update) — fixed build 2.8.0-1 KBCBL-Mariner Releases (Security Update) — fixed build 21.1.2-3 KBCBL-Mariner Releases (Security Update) — fixed build 16.20.1-2 KBCBL-Mariner Releases (Security Update) — fixed build 1.42.0-11