CVE-2021-28855 json
In Deark before 1.5.8, a specially crafted input file can cause a NULL pointer dereference in the dbuf_write function (src/deark-dbuf.c).
published 2021-04-14 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-15509
- cvss
- 5.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 59%
- public exploits
- 0
- none known
Summary
In Deark before 1.5.8, a specially crafted input file can cause a NULL pointer dereference in the dbuf_write function (src/deark-dbuf.c).
Patch / fix
- entropymine deark 1.5.8
Exploit prediction
0.90% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-476 NULL Pointer Dereference
References
-
github.com
/jsummers/deark/commit/287f5ac31dfdc074669182f51ece637706070eeb
patch, third-party-advisory
-
fatihhcelik.github.io
/posts/NULL-Pointer-Dereference-Deark/
patch, third-party-advisory
- github.com /fuzzing2026/CVE-PoCs/tree/main/deark-CVE-2021-28855
Sources
- CVE List CVE-2021-28855
- NVD CVE-2021-28855
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