Linux Kernel up to 5.7.10 mm/mmap.c expand_downwards/expand_upwards race condition

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

A vulnerability was found in Linux Kernel up to 5.7.10 (Operating System). It has been declared as problematic. This vulnerability affects the function expand_downwards/expand_upwards of the file mm/mmap.c. The manipulation with an unknown input leads to a race condition vulnerability. The CWE definition for the vulnerability is 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. The impact remains unknown.

The weakness was presented 11/28/2020. The advisory is available at bugs.chromium.org. This vulnerability was named CVE-2020-29369. Technical details are known, but there is no available exploit.

Upgrading to version 5.7.11 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 upgrading to the latest version.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.0
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

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

Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.7.11
Patch: git.kernel.org

Timelineinfo

11/28/2020 🔍
11/28/2020 +0 days 🔍
11/28/2020 +0 days 🔍
12/11/2020 +13 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: bugs.chromium.org
Status: Confirmed

CVE: CVE-2020-29369 (🔍)

Entryinfo

Created: 11/28/2020 18:14
Updated: 12/11/2020 09:33
Changes: 11/28/2020 18:14 (38), 11/28/2020 18:16 (4), 12/11/2020 09:27 (2), 12/11/2020 09:33 (18)
Complete: 🔍

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