3.8
Low
CVE-2026-16241 Integer underflow in PostgreSQL ECPG allows a database server administrator to achieve temporary denial of service…
Description
Integer underflow in PostgreSQL ECPG allows a database server administrator to achieve temporary denial of service against the ECPG client via sending a bytea value lacking the mandatory prefix. The client overwrites a huge memory region with bytes outside attacker knowledge or control. This typically yields a simple SIGSEGV, but rare cases might achieve client-specific integrity impact via the write. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| postgresql 18 | 18 → < 18.6 | 18.6 |
| postgresql 17 | 17 → < 17.11 | 17.11 |
| postgresql 16 | 16 → < 16.15 | 16.15 |
| postgresql 15 | 15 → < 15.19 | 15.19 |
| postgresql 14.24 | earliest → < 14.24 | 14.24 |
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