#VU63667 Race condition in Linux kernel - CVE-2021-40490
Published: May 25, 2022
Vulnerability identifier: #VU63667
Vulnerability risk: Low
CVSSv4.0: 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-2021-40490
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition in ext4_write_inline_data_end in fs/ext4/inline.c in the ext4 subsystem in the Linux kernel. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
Remediation
Install updates from vendor's website.
External links
- https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=9e445093e523f3277081314c864f708fd4bd34aa
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XJGX3DMJT6MRBW2XEF3TWVHYWZW3DG3N/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M6VS2DLGT7TK7URKAS2KWJL3S533SGVA/
- https://www.debian.org/security/2021/dsa-4978
- https://security.netapp.com/advisory/ntap-20211004-0001/
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html