Vulnerability in Arm Ltd Gnu Toolchain
CVE-2023-4039
**DISPUTED**A 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 det…
EPSS: 0.007 (47.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Arm Ltd Gnu Toolchain — versions All versions where option -fstack-protector is used
- Gnu Gcc — versions All versions of GCC that target AArch64 when option -fstack-protector is used
Weakness classification (CWE)
Public proof-of-concept exploits
References
- arm-security@arm.com (Exploit, Patch, Third Party Advisory)
- arm-security@arm.com (Exploit, Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-4039?
- CVE-2023-4039 is a medium-severity vulnerability in Arm Ltd Gnu Toolchain, classified under Protection Mechanism Failure. CVSS score: 4.8/10. Published 2023-09-13.
- How severe is CVE-2023-4039?
- Medium severity. CVSS v3 base score is 4.8 out of 10.
- Is CVE-2023-4039 known to be exploited?
- 12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.