How severe is CVE-2021-44340?

CVE-2021-44340 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-44340 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44340?

CVE-2021-44340 affects Ok-file-formats Project Ok-file-formats. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-44340?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-44340 published?

CVE-2021-44340 was published on 2022-02-28 and last updated on 2026-06-17.

CVE-2021-44340

CVE-2021-44340 is a high-severity vulnerability in Ok-file-formats Project Ok-file-formats with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Ok-file-formats Project Ok-file-formats
Published: 2022-02-28
Last modified: 2026-06-17

Description

David Brackeen ok-file-formats dev version is vulnerable to Buffer Overflow. When the function of the ok-file-formats project is used, a heap-buffer-overflow occurred in function ok_jpg_generate_huffman_table() in "/ok_jpg.c:403".

Frequently asked questions

What is CVE-2021-44340?: David Brackeen ok-file-formats dev version is vulnerable to Buffer Overflow. When the function of the ok-file-formats project is used, a heap-buffer-overflow occurred in function ok_jpg_generate_huffman_table() in "/ok_jpg.c:403".
How severe is CVE-2021-44340?: CVE-2021-44340 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-44340 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44340?: CVE-2021-44340 affects Ok-file-formats Project Ok-file-formats. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-44340?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-44340 published?: CVE-2021-44340 was published on 2022-02-28 and last updated on 2026-06-17.

References

https://github.com/brackeen/ok-file-formats/issues/11

Affected products (1)

cpe:2.3:a:ok-file-formats_project:ok-file-formats:-:*:*:*:*:*:*:*

More vulnerabilities in Ok-file-formats Project Ok-file-formats

CVE-2021-28233 — High (CVSS 8.8): Heap-based Buffer Overflow vulnerability exists in ok-file-formats 1 via the ok_jpg_generate_huffman_table function in…
CVE-2018-20618 — High (CVSS 8.8): ok-file-formats through 2018-10-16 has a heap-based buffer over-read in the ok_mo_decode2 function in ok_mo.c.
CVE-2018-20617 — High (CVSS 8.8): ok-file-formats through 2018-10-16 has a heap-based buffer overflow in the ok_csv_decode2 function in ok_csv.c.
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CVE-2021-41413 — High (CVSS 7.8): ok-file-formats master 2021-9-12 is affected by a buffer overflow in ok_jpg_convert_data_unit_grayscale and…
CVE-2021-44343 — High (CVSS 7.8): David Brackeen ok-file-formats 203defd is vulnerable to Buffer Overflow. When the function of the ok-file-formats…

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