Homepage

CVE-2023-4039 The advisory has been revoked - it doesn't affect any version of package gcc-12-cross-ports  (opens in a new tab)

Threat Intelligence

EPSS
1.04% (64th 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-UBUNTU2510-GCC12CROSSPORTS-15022297
  • published12 Mar 2026
  • disclosed13 Sept 2023
Report a new vulnerability Found a mistake?

Introduced: 13 Sep 2023

CVE-2023-4039  (opens in a new tab)

Amendment

The Ubuntu security team deemed this advisory irrelevant for Ubuntu:25.10.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gcc-12-cross-ports package and not the gcc-12-cross-ports package as distributed by Ubuntu.

DISPUTEDA failure in the -fstack-protector feature in GCC-based toolchains that target AArch64 allows an attacker to exploit an existing buffer overflow in dynamically-sized local variables in your application without this being detected. This stack-protector failure only applies to C99-style dynamically-sized local variables or those created using alloca(). The stack-protector operates as intended for statically-sized local variables.

The default behavior when the stack-protector detects an overflow is to terminate your application, resulting in controlled loss of availability. An attacker who can exploit a buffer overflow without triggering the stack-protector might be able to change program flow control to cause an uncontrolled loss of availability or to go further and affect confidentiality or integrity. NOTE: The GCC project argues that this is a missed hardening bug and not a vulnerability by itself.