CVE-2021-34122

Name: CVE-2021-34122
Creator: NVD / NIST
Published: 2022-03-10T17:42:36.623+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.80%

Last modified Jun 17, 2026

CVE-2021-34122 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. The function bitstr_tell at bitstr.c in ffjpeg commit 4ab404e has a NULL pointer dereference.. EPSS estimates a 0.80% chance of exploitation in the next 30 days.

Description

The function bitstr_tell at bitstr.c in ffjpeg commit 4ab404e has a NULL pointer dereference.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

0.80%

52.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Rockcarry	Ffjpeg	< 2021-03-16

References

https://github.com/rockcarry/ffjpeg/issues/36Exploit, Patch, Third Party Advisory
https://github.com/rockcarry/ffjpeg/pull/37Patch, Third Party Advisory
https://github.com/rockcarry/ffjpeg/issues/36Exploit, Patch, Third Party Advisory
https://github.com/rockcarry/ffjpeg/pull/37Patch, Third Party Advisory

Timeline

Published: Mar 10, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-34122?

The function bitstr_tell at bitstr.c in ffjpeg commit 4ab404e has a NULL pointer dereference.

How severe is CVE-2021-34122?

CVE-2021-34122 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.80% probability of exploitation in the next 30 days.

How do I fix CVE-2021-34122?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-34122?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST