Out-of-bounds read in Linux kernel ipv6

1) Out-of-bounds read

EUVDB-ID: #VU90339

Risk: Low

CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-47126

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

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 ip6_route_info_create() function in net/ipv6/route.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://git.kernel.org/stable/c/7ba7fa78a92dc410b6f93ed73075ab669c3a0b59
http://git.kernel.org/stable/c/09870235827451409ff546b073d754a19fd17e2e
http://git.kernel.org/stable/c/0a462e25ef0f7ab305081a08d435bbd1f13c0a94
http://git.kernel.org/stable/c/821bbf79fe46a8b1d18aa456e8ed0a3c208c3754

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.