Buffer Overflow Affecting postgresql16-llvmjit-debuginfo package, versions <0:16.14-1.amzn2023.0.1


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.28% (20th percentile)

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  • Snyk IDSNYK-AMZN2023-POSTGRESQL16LLVMJITDEBUGINFO-17289737
  • published10 Jun 2026
  • disclosed14 May 2026

Introduced: 14 May 2026

CVE-2026-6477  (opens in a new tab)
CWE-120  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 postgresql16-llvmjit-debuginfo to version 0:16.14-1.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2026-1767.

NVD Description

Note: Versions mentioned in the description apply only to the upstream postgresql16-llvmjit-debuginfo package and not the postgresql16-llvmjit-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

Use of inherently dangerous function PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(), lo_read(), lo_lseek64(), and lo_tell64() functions allows the server superuser to overwrite a client stack buffer with an arbitrarily-large response. Like gets(), PQfn(..., result_is_int=0, ...) stores arbitrary-length, server-determined data into a buffer of unspecified size. Because both the \lo_export command in psql and pg_dump call lo_read(), the server superuser can overwrite pg_dump or psql stack memory. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

CVSS Base Scores

version 3.1