#VU93211 Resource management error in Linux kernel - CVE-2021-47014
Vulnerability identifier: #VU93211
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-2021-47014
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 tcf_ct_handle_fragments(), tcf_ct_act() and skb_push_rcsum() functions in net/sched/act_ct.c. A local user can perform a denial of service (DoS) attack.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: 5.12, 5.12 rc1, 5.12 rc2, 5.12 rc3, 5.12 rc4, 5.12 rc6, 5.12 rc8, 5.12.1, 5.12.2, 5.12.3, 5.13 rc1, 5.13 rc4, 5.13 rc5
External links
https://git.kernel.org/stable/c/0648941f4c8bbf8b4b6c0b270889ae7aa769b921
https://git.kernel.org/stable/c/f77bd544a6bbe69aa50d9ed09f13494cf36ff806
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
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.
