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

🗓️ 24 Jun 2026 13:59:37Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 4 Views

Buffer overflow in PostgreSQL libpq lets a server superuser overwrite client stack memory via PQfn.

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
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.9aarch64pg_repack1.4.6-3.module+el8.9.0+19330+c97ddbdfpg_repack-1.4.6-3.module+el8.9.0+19330+c97ddbdf.aarch64.rpm
Red Hat Enterprise Linux8.9ppc64lepg_repack1.4.6-3.module+el8.9.0+19330+c97ddbdfpg_repack-1.4.6-3.module+el8.9.0+19330+c97ddbdf.ppc64le.rpm
Red Hat Enterprise Linux8.9s390xpg_repack1.4.6-3.module+el8.9.0+19330+c97ddbdfpg_repack-1.4.6-3.module+el8.9.0+19330+c97ddbdf.s390x.rpm
Red Hat Enterprise Linux8.9x86_64pg_repack1.4.6-3.module+el8.9.0+19330+c97ddbdfpg_repack-1.4.6-3.module+el8.9.0+19330+c97ddbdf.x86_64.rpm
Red Hat Enterprise Linux8.9aarch64pg_repack-debuginfo1.4.6-3.module+el8.9.0+19330+c97ddbdfpg_repack-debuginfo-1.4.6-3.module+el8.9.0+19330+c97ddbdf.aarch64.rpm
Red Hat Enterprise Linux8.9ppc64lepg_repack-debuginfo1.4.6-3.module+el8.9.0+19330+c97ddbdfpg_repack-debuginfo-1.4.6-3.module+el8.9.0+19330+c97ddbdf.ppc64le.rpm
Red Hat Enterprise Linux8.9s390xpg_repack-debuginfo1.4.6-3.module+el8.9.0+19330+c97ddbdfpg_repack-debuginfo-1.4.6-3.module+el8.9.0+19330+c97ddbdf.s390x.rpm
Red Hat Enterprise Linux8.9x86_64pg_repack-debuginfo1.4.6-3.module+el8.9.0+19330+c97ddbdfpg_repack-debuginfo-1.4.6-3.module+el8.9.0+19330+c97ddbdf.x86_64.rpm
Red Hat Enterprise Linux8.9aarch64pg_repack-debugsource1.4.6-3.module+el8.9.0+19330+c97ddbdfpg_repack-debugsource-1.4.6-3.module+el8.9.0+19330+c97ddbdf.aarch64.rpm
Red Hat Enterprise Linux8.9ppc64lepg_repack-debugsource1.4.6-3.module+el8.9.0+19330+c97ddbdfpg_repack-debugsource-1.4.6-3.module+el8.9.0+19330+c97ddbdf.ppc64le.rpm
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20 Jul 2026 10:36Current
7.4High risk
Vulners AI Score7.4
CVSS 3.18.8
EPSS0.00464
SSVC
CWE-120
PostgreSQLbuffer overflowclient memoryserver superuserPQfn function
4