SB2022082941 - Use after free in Linux kernel
Published: August 29, 2022 Updated: June 20, 2024
Security Bulletin ID
SB2022082941
CSH Severity
Low
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) Use after free (CVE-ID: CVE-2022-1043) Exploited
CWE-ID: CWE-416 - Use After Free
CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to escalate privileges on the system.
A flaw was found in the Linux kernel's io_uring implementation. This flaw allows an attacker with a local account to corrupt system memory, crash the system or escalate privileges.
Remediation
Install update from vendor's website.
References
- https://github.com/torvalds/linux/commit/a30f895ad3239f45012e860d4f94c1a388b36d14
- https://bugzilla.redhat.com/show_bug.cgi?id=1997328
- https://www.zerodayinitiative.com/advisories/ZDI-22-362/
- https://access.redhat.com/security/cve/CVE-2022-1043
- http://packetstormsecurity.com/files/170834/io_uring-Same-Type-Object-Reuse-Privilege-Escalation.html