Out-of-bounds read in Okular - #VU131000
Published: May 11, 2026
Vulnerability identifier: #VU131000
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in fax backend FAXMAGIC comparison. A remote attacker can create a specially crafted fax file, trick the victim into opening it, trigger an out-of-bounds read error and read contents of memory on the system.
Affected software
Okular
Remediation
Install updates from vendor's website.
Okular - update to 26.04.1