Linux Kernel up to 5.10.12 VSOCK net/vmw_vsock/af_vsock.c race condition

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CVSS Meta Temp Score
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5.7$0-$5k0.95

A vulnerability, which was classified as critical, was found in Linux Kernel up to 5.10.12 (Operating System). This affects some unknown functionality of the file net/vmw_vsock/af_vsock.c of the component VSOCK Handler. The manipulation with an unknown input leads to a race condition vulnerability. CWE is classifying the issue as CWE-362. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was released 02/05/2021. It is possible to read the advisory at openwall.com. This vulnerability is uniquely identified as CVE-2021-26708 since 02/05/2021. The exploitability is told to be difficult. It is possible to initiate the attack remotely. A authentication is required for exploitation. Technical details and a public exploit are known.

A public exploit has been developed by Alexander Popov (a13xp0p0v) and been published 4 days after the advisory. It is declared as proof-of-concept. The exploit is shared for download at a13xp0p0v.github.io.

Upgrading to version 5.10.13 eliminates this vulnerability. The upgrade is hosted for download at cdn.kernel.org. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be patching the affected component.

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VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 5.7

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.0
NVD Vector: 🔒

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VulDB Base Score: 🔒
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VulDB Reliability: 🔍

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Exploitinginfoedit

Class: Race condition
CWE: CWE-362
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Author: Alexander Popov (a13xp0p0v)
Download: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Countermeasuresinfoedit

Recommended: Patch
Status: 🔍

0-Day Time: 🔒
Exploit Delay Time: 🔍

Upgrade: Kernel 5.10.13
Patch: git.kernel.org

Timelineinfoedit

02/05/2021 Advisory disclosed
02/05/2021 +0 days CVE assigned
02/05/2021 +0 days VulDB entry created
02/09/2021 +3 days Exploit disclosed
04/13/2021 +63 days VulDB last update

Sourcesinfoedit

Vendor: https://www.kernel.org/

Advisory: openwall.com
Status: Confirmed

CVE: CVE-2021-26708 (🔒)
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfoedit

Created: 02/05/2021 08:14 PM
Updated: 04/13/2021 11:43 AM
Changes: (1) exploit_developer_name
Complete: 🔍
Committer: misc

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