Linux Kernel Memory Subsystem mm/gup.c race condition

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6.5	$0-$5k	0.00

A vulnerability, which was classified as critical, has been found in Linux Kernel (Operating System) (unknown version). Affected by this issue is an unknown code block of the file mm/gup.c of the component Memory Subsystem. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A race condition was found in the way the Linux kernel's memory subsystem handled the copy-on-write (COW) breakage of private read-only shared memory mappings. This flaw allows an unprivileged, local user to gain write access to read-only memory mappings, increasing their privileges on the system.

The weakness was disclosed 08/31/2022. The advisory is shared for download at openwall.com. This vulnerability is handled as CVE-2022-2590 since 07/30/2022. There are known technical details, but no exploit is available.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at lore.kernel.org.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

License

open-source

CPE 2.3info

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CPE 2.2info

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CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.5

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.0
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

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

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: lore.kernel.org

Timelineinfo

07/30/2022 🔍
08/31/2022 +32 days 🔍
08/31/2022 +0 days 🔍
10/10/2022 +40 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: openwall.com
Status: Confirmed

CVE: CVE-2022-2590 (🔍)

Entryinfo

Created: 08/31/2022 22:40
Updated: 10/10/2022 12:01
Changes: 08/31/2022 22:40 (40), 10/10/2022 12:01 (11)
Complete: 🔍