CVE-2023-4039 Affecting gcc-13 package, versions <13.2.0-4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ECHOLATEST-GCC13-20557168
- published7 Oct 2026
- disclosed13 Sept 2023
Introduced: 13 Sep 2023
CVE-2023-4039 (opens in a new tab)How to fix?
Upgrade Echo:latest gcc-13 to version 13.2.0-4 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream gcc-13 package and not the gcc-13 package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
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.