Linux Kernel up to 5.13.2 TLB mm/mremap.c use after free

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

A vulnerability was found in Linux Kernel up to 5.13.2 (Operating System) and classified as critical. This issue affects an unknown part of the file mm/mremap.c of the component TLB Handler. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

mm/mremap.c in the Linux kernel before 5.13.3 has a use-after-free via a stale TLB because an rmap lock is not held during a PUD move.

The weakness was shared 09/21/2022. It is possible to read the advisory at bugs.chromium.org. The identification of this vulnerability is CVE-2022-41222 since 09/21/2022. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 5.13.3 eliminates this vulnerability. The upgrade is hosted for download at cdn.kernel.org. Applying the patch 97113eb39fa7972722ff490b947d8af023e1f6a2 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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Vendor

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

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

NVD Base Score: 4.7
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.13.3
Patch: 97113eb39fa7972722ff490b947d8af023e1f6a2

Timelineinfo

09/21/2022 🔍
09/21/2022 +0 days 🔍
09/21/2022 +0 days 🔍
10/21/2022 +30 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 168466
Status: Confirmed

CVE: CVE-2022-41222 (🔍)

Entryinfo

Created: 09/21/2022 12:39
Updated: 10/21/2022 17:09
Changes: 09/21/2022 12:39 (45), 10/21/2022 17:02 (1), 10/21/2022 17:09 (11)
Complete: 🔍

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