Out-of-Bounds Affecting libfbclient2 package, versions <3.0.14.33856-150200.3.9.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.72% (52nd percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-SLES157-LIBFBCLIENT2-16743052
  • published18 May 2026
  • disclosed15 May 2026

Introduced: 15 May 2026

CVE-2026-27890  (opens in a new tab)
CWE-119  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 libfbclient2 to version 3.0.14.33856-150200.3.9.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libfbclient2 package and not the libfbclient2 package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when processing CNCT_specific_data segments during authentication, the server assumes segments arrive in strictly ascending order. If segments arrive out of order, the Array class's grow() method computes a negative size value, causing a SIGSEGV crash. An unauthenticated attacker who knows only the server's IP and port can exploit this to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

CVSS Base Scores

version 3.1