PostgreSQL up to 18.6 Text Search Vector tsvector_delete buffer overflow

Summaryinfo

A vulnerability classified as critical was found in PostgreSQL up to 14.24/15.19/16.15/17.11/18.6. This issue affects the function tsvector_delete of the component Text Search Vector. Such manipulation leads to buffer overflow. This vulnerability is uniquely identified as CVE-2026-116315. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in PostgreSQL up to 14.24/15.19/16.15/17.11/18.6 and classified as critical. Affected by this issue is the function tsvector_delete of the component Text Search Vector. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Heap-based buffer overflow in PostgreSQL tsvector_delete() allows a database user to execute arbitrary code as the operating system user running the database, via a tsvector whose lexeme data uses a nonstandard but valid ordering that requires additional alignment padding in the result. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.

The advisory is shared for download at postgresql.org. This vulnerability is handled as CVE-2026-116315 since 10/26/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available.

Upgrading to version 14.25, 15.20, 16.16, 17.12 or 18.7 eliminates this vulnerability.

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Productinfo

Type

• Database Software

Name

• PostgreSQL

Version

• 14.0
• 14.1
• 14.2
• 14.3
• 14.4
• 14.5
• 14.6
• 14.7
• 14.8
• 14.9
• 14.10
• 14.11
• 14.12
• 14.13
• 14.14
• 14.15
• 14.16
• 14.17
• 14.18
• 14.19
• 14.20
• 14.21
• 14.22
• 14.23
• 14.24
• 15.0
• 15.1
• 15.2
• 15.3
• 15.4
• 15.5
• 15.6
• 15.7
• 15.8
• 15.9
• 15.10
• 15.11
• 15.12
• 15.13
• 15.14
• 15.15
• 15.16
• 15.17
• 15.18
• 15.19
• 16.0
• 16.1
• 16.2
• 16.3
• 16.4
• 16.5
• 16.6
• 16.7
• 16.8
• 16.9
• 16.10
• 16.11
• 16.12
• 16.13
• 16.14
• 16.15
• 17.0
• 17.1
• 17.2
• 17.3
• 17.4
• 17.5
• 17.6
• 17.7
• 17.8
• 17.9
• 17.10
• 17.11
• 18.0
• 18.1
• 18.2
• 18.3
• 18.4
• 18.5
• 18.6

License

• open-source

Website

• Product: https://www.postgresql.org/

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