PostgreSQL up to 18.6 use after free

Summaryinfo

A vulnerability was found in PostgreSQL up to 14.24/15.19/16.15/17.11/18.6. It has been rated as critical. This vulnerability affects unknown code. The manipulation leads to use after free. This vulnerability is listed as CVE-2026-120150. The attack may be initiated remotely. There is no available exploit. 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. It has been rated as critical. This issue affects an unknown function. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Use after free in PostgreSQL expanded-record domain checks allows an object creator to execute arbitrary code as the operating system user running the database, via repeated checks of a domain over a composite type that cause reuse of a dangling memory-context pointer. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.

The advisory is shared at postgresql.org. The identification of this vulnerability is CVE-2026-120150 since 10/30/2026. The exploitation is known to be easy. The attack may be initiated remotely. Neither technical details nor an exploit are publicly 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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Entryinfo

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