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CVE-2021-26708

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Date: February 5, 2021

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.

Language: C

Severity Score

Related Resources (12)

https://people.canonical.com/~ubuntu-security/cve/CVE-2021-26708
http://www.openwall.com/lists/oss-security/2021/02/05/6
https://nvd.nist.gov/vuln/detail/CVE-2021-26708
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13
https://security.netapp.com/advisory/ntap-20210312-0008/
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c518adafa39f37858697ac9309c6cf1805581446
https://access.redhat.com/security/cve/CVE-2021-26708
https://www.openwall.com/lists/oss-security/2021/02/04/5
http://www.openwall.com/lists/oss-security/2021/04/09/2
http://www.openwall.com/lists/oss-security/2022/01/25/14
https://security-tracker.debian.org/tracker/CVE-2021-26708
https://www.mend.io/vulnerability-database/CVE-2021-26708

Severity Score

Weakness Type (CWE)

Improper Privilege Management

CWE-269

Improper Locking

CWE-667

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): COMPLETE
Integrity (I): COMPLETE
Availability (A): COMPLETE
Additional information:

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