Out-of-bounds read in Linux kernel - CVE-2021-46984
Published: May 31, 2024
Vulnerability identifier: #VU90355
CSH Severity: Low
CVSSv4.0: 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/E:U/U:Clear
CVE-ID: CVE-2021-46984
CWE-ID: CWE-125
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 perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds read error within the dd_request_merge() function in block/mq-deadline.c, within the kyber_limit_depth() function in block/kyber-iosched.c, within the __blk_mq_sched_bio_merge() function in block/blk-mq-sched.c, within the bfq_remove_request() function in block/bfq-iosched.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/0b6b4b90b74c27bea968c214d820ba4254b903a5
- https://git.kernel.org/stable/c/54dbe2d2c1fcabf650c7a8b747601da355cd7f9f
- https://git.kernel.org/stable/c/a287cd84e047045f5a4d4da793414e848de627c6
- https://git.kernel.org/stable/c/2ef3c76540c49167a0bc3d5f80d00fd1fc4586df
- https://git.kernel.org/stable/c/efed9a3337e341bd0989161b97453b52567bc59d