SB20260508108 - Privilege escalation via RxRPC Page-Cache Write in Linux kernel
Published: May 8, 2026 Updated: May 25, 2026
Security Bulletin ID
SB20260508108
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-2026-43500)
CWE-ID: CWE-399 - Resource Management Errors
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/U:Amber
The vulnerability allows a local user to escalate privileges on the system.
The RxRPC Page-Cache Write vulnerability exists due to improper management of internal resources. A local user can execute arbitrary code with root privileges.
Note, this vulnerability is one of two issues described as Dirty Frag.
Remediation
Install update from vendor's website.