CVE-2026-102639

MobilityDB version 1.3.0 and earlier contains an out-of-bounds read vulnerability in the MEOS binary and library WKB deserialization logic that allows unprivileged database users to crash the PostgreSQL backend process by supplying a crafted WKB payload with a negative length field. The negative length value wraps to a large unsigned size_t due to missing signed validation, bypasses an overflow-unsafe pointer arithmetic bounds check in wkb_parse_state_check(), and causes memcpy() in text_from_wkb_state() to operate with a corrupted unbounded length, resulting in a remote denial-of-service condition affecting all sessions on the PostgreSQL instance.

• https://github.com/MobilityDB/MobilityDB/releases/tag/v1.2.2
• https://github.com/MobilityDB/MobilityDB/releases/tag/v1.3.1
• https://github.com/MobilityDB/MobilityDB/security/advisories/GHSA-2c92-2w7c-pm3g

• https://github.com/MobilityDB/MobilityDB/releases/tag/v1.2.2
• https://github.com/MobilityDB/MobilityDB/releases/tag/v1.3.1
• https://github.com/MobilityDB/MobilityDB/security/advisories/GHSA-2c92-2w7c-pm3g
• https://www.vulncheck.com/advisories/mobilitydb-through-out-of-bounds-read-dos-via-wkb-deserialization

• HIGHCVE-2026-74220PoC
• HIGHCVE-2026-74221PoC
• UNSCOREDCVE-2026-77406PoC

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