CVE-2026-70634 | BDVDB-2026-356146 Detail

Description#

TimescaleDB through 2.29.1, fixed in commit 517c13e, contains an out-of-bounds read in the Dictionary compression reverse row iterator (tsl/src/compression/algorithms/dictionary.c). The forward path validates the decoded index; the reverse path uses an assertion compiled out of release builds, leaving the 64-bit Simple8b index unvalidated and the read offset attacker-controlled. Attackers with DML access to a physical compressed relation can store a crafted datum and run a reverse-order scan. With a pass-by-value column type the out-of-bounds Datum is returned to the client as a normal column value, disclosing backend memory including the shared buffer pool, which SQL access control does not cover.

Impact#

Weaknesses#

References#

Exploit#

History#

1. Version 12026-08-06Record published in the CVE List.
2. Version 22026-11-08Most recent update recorded in the CVE List.