SB20261007100 - Incorrect calculation in Linux kernel kernel kprobes
Published: October 7, 2026
Security Bulletin ID
SB20261007100
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) Incorrect calculation (CVE-ID: CVE-2026-98273)
CWE-ID: CWE-682 - Incorrect Calculation
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 an incorrect exception return address calculation in int3_emulate_call() in the x86 kprobes implementation when emulating a six-byte CS-prefixed CALL instruction using an assumed five-byte instruction length. A local user can use eBPF to probe a CS-prefixed CALL instruction within a kernel function to cause a denial of service.
Remediation
Install update from vendor's website.