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5.5

YASM 1.3.0.86.g9def may crash during expression handling

CVE-2023-49556 · published 2 years ago
Summary

The YASM assembler version 1.3.0.86.g9def contains a flaw in its expression‑deleting routine that can be triggered by a remote attacker, causing the program to stop working. This results in a denial of service, meaning the assembler becomes unusable until restarted. Apply the latest YASM update or install security patches provided by your Linux distribution to fix the issue.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
Ecosystem VendorProductAffected versions
Debian:12 debian yasm All versions
Debian:13 debian yasm All versions
Debian:14 debian yasm All versions
– yasm_project yasm 1.3.0.86.g9def
cpe:2.3:a:yasm_project:yasm:1.3.0.86.g9def:*:*:*:*:*:*:*
Ubuntu:16.04:LTS canonical yasm All versions
Original advisory text
Buffer Overflow vulnerability in YASM 1.3.0.86.g9def allows a remote attacker to cause a denial of service via the expr_delete_term function in the libyasm/expr.c component.
Buffer Overflow vulnerability in YASM 1.3.0.86.g9def allows a remote attacker to cause a denial of service via the expr_delete_term function in the libyasm/expr.c component.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
5.5 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-120Classic Buffer Overflow
Timeline
Published3 Jan 2024
Updated4 Nov 2026
First seen15 Sep 2026
Sources
DEBIAN-CVE-2023-49556 · OSV
CVE-2023-49556 · NVD
UBUNTU-CVE-2023-49556 · OSV
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