CVE-2023-29579

yasm 1.3.0.55.g101bc was discovered to contain a stack overflow via the component yasm/yasm...

5.5 MediumFix availableDisputed

yasm 1.3.0.55.g101bc was discovered to contain a stack overflow via the component yasm/yasm+0x43b466 in vsprintf. Note: This has been disputed by third parties who argue this is a bug and not a security issue because yasm is a standalone program not designed to run untrusted code.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.30%Up 0.2 points since Apr 25, 2023

What each source reports

NVD Score used 5.5

Record: CVE-2023-29579
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-787
Updated: 2026-11-02

CVE List No score

Record: CVE-2023-29579
Updated: 2026-11-02

EUVDEUVD-2023-33120 No score

Record: EUVD-2023-33120
Updated: 2026-11-03

GitHub AdvisoriesGHSA-9rj4-9hjf-7pcg 7.8

yasm 1.3.0.55.g101bc was discovered to contain a stack overflow via the component yasm/yasm...

yasm 1.3.0.55.g101bc was discovered to contain a stack overflow via the component yasm/yasm+0x43b466 in vsprintf.

Record: GHSA-9rj4-9hjf-7pcg
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-787
Updated: 2026-11-02

OSV 5.5

Record: CVE-2023-29579
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2023-29579 5.5

Record: DEBIAN-CVE-2023-29579
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVOESA-2025-1526 5.5

yasm security update

Yasm is a complete rewrite of the NASM assembler under the “new” BSD License.

Security Fix(es):

An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in yasm_expr_get_intnum() in libyasm/expr.c.(CVE-2021-33454)

An issue was discovered in yasm version 1.3.0. There is a heap-buffer-overflow in inc_fopen() in modules/preprocs/nasm/nasm-pp.c.(CVE-2021-33464)

Record: OESA-2025-1526
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

yasm project yasm

Affected packages

Affected packages
Package	Affected	Fixed
`yasm` Debian:12	All versions, plus listed versions 1.3.0-41.3.0-51.3.0-61.3.0-71.3.0-8	None known
`yasm` Debian:13	before 1.3.0-7	1.3.0-7
`yasm` Debian:14	before 1.3.0-7	1.3.0-7
`yasm` openEuler:24.03-LTS-SP1 From an advisory covering 3 CVEs	before 1.3.0-13.oe2403sp1	1.3.0-13.oe2403sp1
`yasm` openEuler:20.03-LTS-SP4 From an advisory covering 3 CVEs	before 1.3.0-13.oe2003sp4	1.3.0-13.oe2003sp4
`yasm` openEuler:22.03-LTS-SP3 From an advisory covering 3 CVEs	before 1.3.0-13.oe2203sp3	1.3.0-13.oe2203sp3
`yasm` openEuler:22.03-LTS-SP4 From an advisory covering 3 CVEs	before 1.3.0-13.oe2203sp4	1.3.0-13.oe2203sp4
`yasm` openEuler:24.03-LTS From an advisory covering 3 CVEs	before 1.3.0-13.oe2403	1.3.0-13.oe2403

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-29579 is a medium vulnerability (CVSS 5.5) in Yasm Project Yasm, published April 24, 2023. Its validity is disputed. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 23rd percentile. Fixed in yasm 1.3.0-7.