Low [CVE-2026-16241] Denial of Service via integer underflow
This low-severity Red Hat Linux advisory covers CVE-2026-16241 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
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 34 official vendor sources and 160+ reviewed platform categories.
Summary
Integer underflow in PostgreSQL ECPG allows a database server administrator to achieve temporary denial of service against the ECPG client via sending a bytea value lacking the mandatory prefix. The client overwrites a huge memory region with bytes outside attacker knowledge or control.
This typically yields a simple SIGSEGV, but rare cases might achieve client-specific integrity impact via the write. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.
This vulnerability causes the client to overwrite a large memory region, leading to a temporary denial of service (DoS). This Low impact flaw in PostgreSQL ECPG affects client applications.
The limited scope to client-side disruption and the prerequisite of elevated server privileges contribute to its lower severity. Red Hat severity: Low — CVSS 3.8 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L).
Weakness: CWE-191. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Self-service automation portal 2.
Red Hat lists Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Hardened Images as not affected. 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 17 days 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 17 days ago·verify at source
Mitigation checklist
- To mitigate this vulnerability, ensure that database server administrator privileges are tightly controlled and only granted to highly trusted individuals. Because exploiting this flaw requires an attacker to already have administrative control over the database server to target connecting ECPG clients, adhering to the principle of least privilege and maintaining strict access controls on server administration effectively neutralizes the risk.
Official advisory · high-confidence parse· fetched 17 days 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.