SB20260918201 - Incorrect calculation in Linux kernel riscv net
Published: September 18, 2026
Security Bulletin ID
SB20260918201
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Incorrect calculation (CVE-ID: CVE-2026-92518)
CWE-ID: CWE-682 - Incorrect Calculation
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause kernel stack corruption.
The vulnerability exists due to an incorrect tailcall jump-offset calculation in the RISC-V BPF JIT compiler when executing BPF tail calls with CONFIG_CFI_CLANG enabled. A local user can trigger the erroneous tailcall jump to cause kernel stack corruption.
Remediation
Install update from vendor's website.