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postgresql: PostgreSQL libpq: Buffer overflow allows server superuser to overwrite client stack memory

🗓️ 23 Jul 2026 09:13:16Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 6 Views

A buffer overflow in PostgreSQL libpq PQfn allows a server superuser to overwrite the client stack.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: IBM QRadar SIEM is vulnerable to using components with known vulnerabilities
16 Jun 202615:07
–ibm
FreeBSD		PostgreSQL -- Multiple vulnerabilities
14 May 202600:00
–freebsd
ATTACKERKB		CVE-2026-6477
14 May 202613:00
–attackerkb
Tenable Nessus		Amazon Linux 2023 : libpq, libpq-devel (ALAS2023-2026-1711)
28 May 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : postgresql17, postgresql17-contrib, postgresql17-llvmjit (ALAS2023-2026-1766)
8 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : postgresql16, postgresql16-contrib, postgresql16-llvmjit (ALAS2023-2026-1767)
8 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : postgresql15, postgresql15-contrib, postgresql15-llvmjit (ALAS2023-2026-1768)
8 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : postgresql18, postgresql18-contrib, postgresql18-llvmjit (ALAS2023-2026-1780)
8 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2 : postgresql, --advisory ALAS2-2026-3344 (ALAS-2026-3344)
8 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2 : libpq, --advisory ALAS2POSTGRESQL14-2026-023 (ALASPOSTGRESQL14-2026-023)
8 Jun 202600:00
–nessus
Rows per page
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.8aarch64libpq13.23-3.el9_8libpq-13.23-3.el9_8.aarch64.rpm
Red Hat Enterprise Linux9.8i686libpq13.23-3.el9_8libpq-13.23-3.el9_8.i686.rpm
Red Hat Enterprise Linux9.8ppc64lelibpq13.23-3.el9_8libpq-13.23-3.el9_8.ppc64le.rpm
Red Hat Enterprise Linux9.8s390xlibpq13.23-3.el9_8libpq-13.23-3.el9_8.s390x.rpm
Red Hat Enterprise Linux9.8x86_64libpq13.23-3.el9_8libpq-13.23-3.el9_8.x86_64.rpm
Red Hat Enterprise Linux9.8aarch64libpq-debuginfo13.23-3.el9_8libpq-debuginfo-13.23-3.el9_8.aarch64.rpm
Red Hat Enterprise Linux9.8i686libpq-debuginfo13.23-3.el9_8libpq-debuginfo-13.23-3.el9_8.i686.rpm
Red Hat Enterprise Linux9.8ppc64lelibpq-debuginfo13.23-3.el9_8libpq-debuginfo-13.23-3.el9_8.ppc64le.rpm
Red Hat Enterprise Linux9.8s390xlibpq-debuginfo13.23-3.el9_8libpq-debuginfo-13.23-3.el9_8.s390x.rpm
Red Hat Enterprise Linux9.8x86_64libpq-debuginfo13.23-3.el9_8libpq-debuginfo-13.23-3.el9_8.x86_64.rpm
Rows per page

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23 Jul 2026 16:25Current
8.8High risk
Vulners AI Score8.8
CVSS 3.18.8
EPSS0.00454
SSVC
CWE-120
PostgreSQL libpqbuffer overflowserver superuserclient stack
6