CVE-2021-39521

6.5 mediumEPSS 0.9%

Medium (6.5) in gnu libredwg. EPSS 0.9% chance of exploitation in the next 30 days.

An issue was discovered in libredwg through v0.10.1.3751. A NULL pointer dereference exists in the function bit_read_BB() located in bits.c. It allows an attacker to cause Denial of Service.

Severity

CVSS 3.1

6.5 medium

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

EPSS: 0.9% chance of exploitation in the next 30 days; higher than 58% of CVEs (scores of 2026-10-31)
CWE: CWE-476
Published: 2021-09-20
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

gnu:libredwg

References

https://github.com/LibreDWG/libredwg/issues/262
https://github.com/LibreDWG/libredwg/issues/262

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