SB2026090433 - Out-of-bounds read in Linux kernel net ovpn driver
Published: September 4, 2026
Security Bulletin ID
SB2026090433
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2026-80735)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to read out-of-bounds memory.
The vulnerability exists due to an out-of-bounds read in the ovpn socket handling code when processing a socket whose sk_user_data is set without the expected encapsulation type. A local user can cause ovpn to dereference the socket's sk_user_data to read out-of-bounds memory.
Remediation
Install update from vendor's website.