CVE-2021-28233: Heap-based Buffer Overflow vulnerability exists in ok-file-formats 1 via the ok_jpg_generate_huffman_table fun

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HIGH 8.8MITIGATE

CVE-2021-28233 is a high-severity flaw (CVSS 8.8) affecting ok-file-formats. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Heap-based Buffer Overflow vulnerability exists in ok-file-formats 1 via the ok_jpg_generate_huffman_table function in ok_jpg.c.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-787
Published	2021-08-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ok-file-formats project

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

Am I affected?

Timeline

2021-08-27 19:15 UTCPublished CVE record published
2026-06-17 03:46 UTCUpdated Record last modified

ok-file-formats project ok-file-formats MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ok-file-formats || rpm -q ok-file-formats || ok-file-formats --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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-2021-28233?

ok-file-formats: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-28233 being exploited?

CVE-2021-28233 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-2021-28233 affect?

CVE-2021-28233 affects ok-file-formats. Severity is high (CVSS 8.8). Heap-based Buffer Overflow vulnerability exists in ok-file-formats 1 via the ok_jpg_generate_huffman_table function in ok_jpg.c.

How urgent is CVE-2021-28233?

Priority 52/100. High severity; Public exploit reference

Related CVEs

CVE-2021-44343 HIGH 7.8 DOWNGRADE David Brackeen ok-file-formats 203defd is vulnerable to Buffer Overflow
CVE-2021-44342 HIGH 7.8 DOWNGRADE David Brackeen ok-file-formats 203defd is vulnerable to Buffer Overflow via function ok_png_transform_scanline
CVE-2021-44340 HIGH 7.8 MITIGATE David Brackeen ok-file-formats dev version is vulnerable to Buffer Overflow
CVE-2021-44339 HIGH 7.8 DOWNGRADE David Brackeen ok-file-formats 203defd is vulnerable to Buffer Overflow
CVE-2021-44335 HIGH 7.8 DOWNGRADE David Brackeen ok-file-formats 203defd is vulnerable to Buffer Overflow

References

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