Use-after-free in Linux kernel - CVE-2022-29582
Published: May 30, 2022 / Updated: May 30, 2022
Vulnerability identifier: #VU63792
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2022-29582
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in the io_uring timeouts() function in the Linux kernel. A local user can trigger a race condition between timeout flush and removal to cause a denial of service or escalate privileges on the system.
How to mitigate CVE-2022-29582
Install updates from vendor's website.
Sources
- https://bugzilla.redhat.com/show_bug.cgi?id=2078456
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e677edbcabee849bfdd43f1602bccbecf736a646
- https://github.com/torvalds/linux/commit/e677edbcabee849bfdd43f1602bccbecf736a646
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.3
- http://www.openwall.com/lists/oss-security/2022/04/22/4
- https://www.debian.org/security/2022/dsa-5127