CVE-2023-4039

mediumpriority · track · 19EPSS 0.010 · 64 %ileDEEUFRRUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
1.04% (64th) EPSS
CVSS 4.8 · medium
Is it mine?
42 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

**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 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.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

02

cvss

Technical severity, 0–10. One row per scoring source.

4.8
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.14.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.2 · impact 2.5
v3.14.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Nsecondary · CISA US
v3.14.8mediumAV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Nsecondary · FSTEC (BDU) RU
v3.14.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Nsecondary · ENISA EU
v3.14.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Nsecondary · arm-security@arm.comexploitability 2.2 · impact 2.5
v3.14.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Nsecondary · Siemens ProductCERT DE
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: no · Technical Impact: partialcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-693USCWE-693USCWE-693USCWE-693US
05

affected products (42)

Products and version ranges known to be affected.

showing 20 of 42
06

advisories (7)

Vendor and ecosystem advisories describing this.

  • SSA-355557SSA-355557: Multiple Vulnerabilities in Third-Party Components in SINEC OS before V3.22025-08-12csaf · siemens_psirtDE

    SINEC OS before V3.2 contains third-party components with multiple vulnerabilities. Siemens has released new versions for the affected products and recommends to update to the latest versions.

  • SSA-398330SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.52023-12-12csaf · siemens_psirtDE

    Multiple vulnerabilities have been identified in the additional GNU/Linux subsystem of the firmware version >= V3.1.0 and < V3.1.5 for the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP (incl. SIPLUS variant). These GNU/Linux vulnerabilities have been externally identified. Siemens has released new versions for the affected products and recommends to update to the latest versions. SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 are no longer maintained and there won't be any update to the CVE list anymore. Please update to the latest version. Note: This SSA advises vulnerabilities for firmware version V3.1 only; for versions < V3.1 refer to Siemens Security Bulletin SSB-439005 (https://cert-portal.siemens.com/productcert/html/ssb-439005.html).

  • WID-SEC-W-2023-2351gcc: Schwachstelle ermöglicht Umgehen von SicherheitsvorkehrungenDeutsch2023-09-13csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann eine Schwachstelle in gcc ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

  • WID-SEC-W-2023-2679Oracle Communications: Mehrere SchwachstellenDeutsch2023-10-17csaf · cert_bundDE

    Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle Communications ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.

  • ICSA-23-348-10Siemens SIMATIC S7-15002023-12-12icsa · cisa_csaf_otUS

    Multiple vulnerabilities have been identified in the additional GNU/Linux subsystem of the firmware version >= V3.1.0 and < V3.1.5 for the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP (incl. SIPLUS variant). These GNU/Linux vulnerabilities have been externally identified. Siemens has released new versions for the affected products and recommends to update to the latest versions. Note: This SSA advises vulnerabilities for firmware version V3.1 only; for versions < V3.1 refer to Siemens Security Bulletin SSB-439005 ( https://cert-portal.siemens.com/productcert/html/ssb-439005.html).

  • ICSA-25-226-07Siemens Third-Party Components in SINEC OS2025-08-12icsa · cisa_csaf_otUS

    SINEC OS before V3.2 contains third-party components with multiple vulnerabilities. Siemens has released new versions for the affected products and recommends to update to the latest versions.

  • CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
07

also known as (3)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundcisa_csaf_otsiemens_psirtcertfrNVDCVE.orgMITRE
published 2023-09-13modified 2026-10-14
09

references (15)

External citations — patches, advisories, analysis.

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