Zserio is a framework for serializing structured data with a compact and efficient way with low overhead. Prior to 2.18.1, in BitStreamReader.h readBytes() / readString(), the setBitPosition() bounds check receives the overflowed value and is completely bypassed. The code then reads len bytes (512 MB) from a buffer that is only a few bytes long, causing a segmentation fault. This vulnerability is fixed in 2.18.1.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/ndsev/zserio/security/advisories/GHSA-fjwv-6wcr-vqwj Exploit, Mitigation, Vendor Advisory
- https://github.com/ndsev/zserio/security/advisories/GHSA-fjwv-6wcr-vqwj Exploit, Mitigation, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.5 · nds-associationNVD modified 2026-10-26 00:10
Affected (CPE criteria) 1
cpe:2.3:a:nds-association:zserio:*:*:*:*:*:*:*:*
References 2
- https://github.com/ndsev/zserio/security/advisories/GHSA-fjwv-6wcr-vqwj Exploit, Mitigation, Vendor Advisory
- https://github.com/ndsev/zserio/security/advisories/GHSA-fjwv-6wcr-vqwj Exploit, Mitigation, Vendor Advisory