Heap-based Buffer Overflow Vulnerability in LibRaw by LibRaw Development Team
CVE-2026-20889

9.8CRITICAL

Key Information:

Vendor

Libraw

Status
Libraw
Vendor
CVE Published:
7 April 2026

What is CVE-2026-20889?

A heap-based buffer overflow vulnerability exists within the x3f_thumb_loader functionality of LibRaw, introduced in Commit d20315b. This security flaw can be exploited by an attacker through a specially crafted malicious file. When this file is processed by the system, it may lead to a heap buffer overflow, potentially allowing an attacker to execute arbitrary code or disrupt application functionality. Proper precautions and updates should be taken to mitigate this risk.

Affected Version(s)

LibRaw Commit d20315b

References

https://talosintelligence.com/vulnerability_reports/TALOS...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Discovered by Francesco Benvenuto of Cisco Talos.
.