High [CVE-2026-14677] Arbitrary code execution in 32-bit pltcl and plperl
This high-severity Red Hat Linux advisory covers CVE-2026-14677 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7.
Android app · Google Play
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Summary
Integer wraparound in PostgreSQL 32-bit builds of pltcl and plperl allows an object creator to cause the server to undersize an allocation and write out-of-bounds via crafted function bodies. This may execute arbitrary code as the operating system user running the database.
CVE-2026-6473 had fixed similar problems. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.
A flaw was found in PostgreSQL. Exploitation requires specific conditions related to 32-bit environments and the ability to create objects within the database.
Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-190.
Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Self-service automation portal 2. Red Hat lists Red Hat Hardened Images as not affected.
Will not fix / out of support: Red Hat Enterprise Linux 6. Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: postgresql16; Red Hat package: postgresql18.
- < 18.5
- < 17.11
- < 16.15
- < 15.19
- < 14.24
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- To mitigate this issue, disable or remove the `pltcl` and `plperl` extensions if they are not essential for your PostgreSQL deployment, particularly in 32-bit environments. This can be done by revoking `CREATE` privilege on `LANGUAGE pltcl` and `LANGUAGE plperl` from untrusted users. If these extensions are necessary, ensure that only trusted users possess object creation privileges within the database.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.