SB20260812109 - Out-of-bounds read in Linux kernel xfrm
Published: August 12, 2026
Security Bulletin ID
SB20260812109
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2026-68420)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to out-of-bounds read in xfrm_state_find() when processing outbound xfrm policies with optional IPTFS templates. A local user can create a crafted outbound policy and trigger packet processing to cause a denial of service.
Only outbound policies are affected; IN and FWD policies are not impacted.
Remediation
Install update from vendor's website.