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CVE record · CVE-2023-4039

GCC's-fstack-protector fails to guard dynamically-sized local variables on AArch64

CVSS 4.8 MediumEPSS 0.010 · 64th percentile

Published by the CVE Program (CNA: Arm) at 13 Sept 2023, 08:05 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Arm Ltd Arm GNU Toolchain
  • affected All versions where option -fstack-protector is used
Other versions: affected
GNU GCC
  • affected All versions of GCC that target AArch64 when option -fstack-protector is used
Other versions: unaffected
Identifiers
CVE-2023-4039
CNA
Arm
Weakness (CWE)
CWE-693
Tags
Published
13 Sept 2023
Updated
14 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
4.8 Medium 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N CNA (Arm)
  • CISA KEV Not listed.
  • EPSS 0.010, the 64th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 13 Sept 2023. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.