SB20260508111 - Privilege escalation via xfrm-ESP Page-Cache Write in Linux kernel
Published: May 8, 2026
Security Bulletin ID
SB20260508111
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Resource management error (CVE-ID: CVE-2026-43284)
The vulnerability allows a local user to escalate privileges on the system.
The xfrm-ESP Page-Cache Write vulnerability exists due to improper management of internal resources in esp_input() function in net/ipv4/esp4.c and esp6_input() function in net/ipv6/esp6.c. A local user can execute arbitrary code with root privileges.
Note, this is one of two vulnerabilities reported as Dirty Frag.
Remediation
Install update from vendor's website.