CVE-2021-45385: A Null Pointer Dereference vulnerability exits in ffjpeg d5cfd49 (2021-12-06) in bmp_load()

This month

MEDIUM 6.5DOWNGRADE

CVE-2021-45385 is a medium-severity flaw (CVSS 6.5) affecting ffjpeg. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A Null Pointer Dereference vulnerability exits in ffjpeg d5cfd49 (2021-12-06) in bmp_load(). When the size information in metadata of the bmp is out of range, it returns without assign memory buffer to `pb->pdata` and did not exit the program. So the program crashes when it tries to access the pb->data, in jfif_encode() at jfif.c:763. This is due to the incomplete patch for CVE-2020-13438.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-476
Published	2022-02-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: rockcarry

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

Am I affected?

Timeline

2022-02-11 16:15 UTCPublished CVE record published
2026-06-17 04:13 UTCUpdated Record last modified

rockcarry ffjpeg DOWNGRADE

Affected: 2021-12-06

Fixed in: no fixed release known

Safe to downgrade to: a release before 2021-12-06

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2021-12-06 (Debian / Ubuntu)

apt-cache madison ffjpeg sudo apt install ffjpeg=<VERSION_BEFORE_2021-12-06> sudo apt-mark hold ffjpeg

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

dnf --showduplicates list ffjpeg sudo dnf downgrade ffjpeg-<VERSION_BEFORE_2021-12-06> sudo dnf versionlock add ffjpeg

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-2021-45385?

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

Is CVE-2021-45385 being exploited?

CVE-2021-45385 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-2021-45385 affect?

CVE-2021-45385 affects ffjpeg. Severity is medium (CVSS 6.5). A Null Pointer Dereference vulnerability exits in ffjpeg d5cfd49 (2021-12-06) in bmp_load(). When the size information in metadata of the bmp is out of range, it returns without assign memory buffer to `pb->pdata` and did not exit the progr

How urgent is CVE-2021-45385?

Priority 43/100. Public exploit reference

Related CVEs

CVE-2022-35433 MEDIUM 6.5 UPGRADE ffjpeg commit caade60a69633d74100bd3c2528bddee0b6a1291 was discovered to contain a memory leak via /src/jfif.c
CVE-2022-28471 MEDIUM 6.5 DOWNGRADE In ffjpeg (commit hash: caade60), the function bmp_load() in bmp.c contains an integer overflow vulnerability,
CVE-2021-44957 MEDIUM 6.5 UPGRADE Global buffer overflow vulnerability exist in ffjpeg through 01.01.2021
CVE-2021-44956 MEDIUM 6.5 UPGRADE Two Heap based buffer overflow vulnerabilities exist in ffjpeg through 01.01.2021
CVE-2021-34122 MEDIUM 5.5 UPGRADE The function bitstr_tell at bitstr.c in ffjpeg commit 4ab404e has a NULL pointer dereference.

References

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