CVE-2026-32853

medium Red Hat
CVSS v3 Base Score
5.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Confidentiality
Low
Integrity
None
Availability
Low
Published: March 24, 2026 (51 days ago)
Last Modified: March 24, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in LibVNCServer. A malicious VNC server can exploit an improper bounds checking vulnerability in the UltraZip encoding handler, specifically within the `HandleUltraZipBPP()` function. By manipulating subrectangle header counts, an attacker can read beyond the allocated memory buffer. This heap out-of-bounds read can lead to information disclosure or cause the application to crash, resulting in a Denial of Service (DoS).

CWE

CWE-125

Affected Products

Red Hat Enterprise Linux 6Red Hat Enterprise Linux 7Red Hat Enterprise Linux 8Red Hat Enterprise Linux 9

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 github.com 🔗 github.com