CVE-2021-26708

high

Description

A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support.

References

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c518adafa39f37858697ac9309c6cf1805581446

https://www.openwall.com/lists/oss-security/2021/02/04/5

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13

http://www.openwall.com/lists/oss-security/2021/02/05/6

https://security.netapp.com/advisory/ntap-20210312-0008/

http://www.openwall.com/lists/oss-security/2021/04/09/2

http://www.openwall.com/lists/oss-security/2022/01/25/14

Details

Source: MITRE

Published: 2021-02-05

Updated: 2022-02-25

Type: CWE-269

Risk Information

CVSS v2

Base Score: 6.9

Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.4

Severity: MEDIUM

CVSS v3

Base Score: 7

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1

Severity: HIGH