CVE-2025-8836: jasper_project jasper Reachable Assertion

Vulnerability summary

CVE-2025-8836 is a medium (CVSS 4.8) Reachable Assertion vulnerability in jasper_project jasper. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11.1% of scored vulnerabilities. 3 public exploits are recorded.

Timeline

1. 11-08-2025
   PublishedVulnerability first disclosed.
2. 12-08-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability was determined in JasPer up to 4.2.5. Affected by this issue is the function jpc_floorlog2 of the file src/libjasper/jpc/jpc_enc.c of the component JPEG2000 Encoder. The manipulation leads to reachable assertion. The attack needs to be approached locally. The exploit has been disclosed to the public and may be used. The patch is identified as 79185d32d7a444abae441935b20ae4676b3513d4. It is recommended to apply a patch to fix this issue.

• CWE-617Reachable AssertionThe product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.