SB2023011193 - Observable discrepancy in Linux kernel
Published: January 11, 2023 Updated: October 31, 2025
Security Bulletin ID
SB2023011193
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Observable discrepancy (CVE-ID: CVE-2022-4543)
CWE-ID: CWE-203 - Observable discrepancy
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear
The vulnerability allows a local user to gain access to sensitive information.
A flaw named 'EntryBleed' was found in the Linux Kernel Page Table Isolation (KPTI). This issue could allow a local attacker to leak KASLR base via prefetch side-channels based on TLB timing for Intel systems.
Remediation
Install update from vendor's website.