CVE-2021-26708 Information

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.

CVSS Vector

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

Reference

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

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.0