#VU92964 Resource management error in Linux kernel - CVE-2021-47498
Vulnerability identifier: #VU92964
Vulnerability risk: Low
CVSSv4.0: 4.3 [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-2021-47498
CWE-ID:
CWE-399
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to resource management error within the dm_mq_queue_rq() function in drivers/md/dm-rq.c. A local user can perform a denial of service (DoS) attack.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: 5.14, 5.14 rc1, 5.14 rc2, 5.14 rc3, 5.14 rc4, 5.14 rc7, 5.14.0-49.el9, 5.14.1, 5.14.2, 5.14.3, 5.14.4, 5.14.5, 5.14.6, 5.14.7, 5.14.8, 5.14.9, 5.14.10, 5.14.11, 5.14.12, 5.14.13, 5.15 rc1, 5.15 rc2, 5.15 rc3, 5.15 rc4, 5.15 rc5, 5.15 rc6, 5.15 rc7
External links
https://git.kernel.org/stable/c/8ca9745efe3528feb06ca4e117188038eea2d351
https://git.kernel.org/stable/c/b4459b11e84092658fa195a2587aff3b9637f0e7
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.14
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
