CVE-2024-22653: yasm commit 9defefae was discovered to contain a NULL pointer dereference via the yasm_section_bcs_append func

This week

MEDIUM 4.8REMOTEDOWNGRADE

CVE-2024-22653 is a medium-severity flaw (CVSS 4.8) affecting yasm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

yasm commit 9defefae was discovered to contain a NULL pointer dereference via the yasm_section_bcs_append function at section.c.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 81%)
CISA exploited list	No
Weakness	CWE-476
Published	2025-05-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: yasm project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-05-29 15:15 UTCPublished CVE record published
2026-06-17 07:11 UTCUpdated Record last modified

yasm project yasm DOWNGRADE

Affected: 2023-09-22

Fixed in: no fixed release known

Safe to downgrade to: a release before 2023-09-22

1. Check installed version

apt-cache policy yasm || rpm -q yasm || yasm --version

2. No fixed release: DOWNGRADE to a release before 2023-09-22 (Debian / Ubuntu)

apt-cache madison yasm sudo apt install yasm=<VERSION_BEFORE_2023-09-22> sudo apt-mark hold yasm

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list yasm sudo dnf downgrade yasm-<VERSION_BEFORE_2023-09-22> sudo dnf versionlock add yasm

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-22653?

yasm: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-22653 being exploited?

CVE-2024-22653 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-22653 affect?

CVE-2024-22653 affects yasm. Severity is medium (CVSS 4.8). yasm commit 9defefae was discovered to contain a NULL pointer dereference via the yasm_section_bcs_append function at section.c.

How urgent is CVE-2024-22653?

Priority 32/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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