MEDIUM 5.3 Microsoft
CVE-2026-72854
msgpack-c Integer Overflow in msgpack_unpacker_expand_buffer Causes a False-Success Undersized Reservation
Microsoft Security Update 2026-Aug: msgpack-c Integer Overflow in msgpack_unpacker_expand_buffer Causes a False-Success Undersized Reservation
Affected Products
- azl3 fluent-bit 3.1.10-6 on Azure Linux 3.0
- azl3 lttng-tools 2.13.11-1 on Azure Linux 3.0
- azl3 msgpack 3.3.0-1 on Azure Linux 3.0
- azl3 fluent-bit 3.1.10-7 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72854
- https://nvd.nist.gov/vuln/detail/CVE-2026-72854
This medium severity vulnerability with a CVSS score of 5.3 was published on 2026-08-11 via Microsoft. Affected: azl3 fluent-bit 3.1.10-6 on Azure Linux 3.0, azl3 lttng-tools 2.13.11-1 on Azure Linux 3.0, azl3 msgpack 3.3.0-1 on Azure Linux 3.0 and 1 more.
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