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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6.0$0-$5k0.03

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 memory corruption 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. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/21/2022).

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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CPE 2.3info

CPE 2.2info

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

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

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-416 / CWE-119
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: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.13.3
Patch: 97113eb39fa7972722ff490b947d8af023e1f6a2

Timelineinfo

09/21/2022 Advisory disclosed
09/21/2022 +0 days CVE reserved
09/21/2022 +0 days VulDB entry created
09/21/2022 +0 days VulDB last update

Sourcesinfo

Vendor: kernel.org

Advisory: bugs.chromium.org
Status: Confirmed

CVE: CVE-2022-41222 (🔒)

Entryinfo

Created: 09/21/2022 12:39 PM
Changes: (45) software_vendor software_name software_version software_component software_file software_type vulnerability_cwe vulnerability_risk vulnerability_cvss2_vuldb_basescore vulnerability_cvss2_vuldb_tempscore vulnerability_cvss2_vuldb_av vulnerability_cvss2_vuldb_ac vulnerability_cvss2_vuldb_au vulnerability_cvss2_vuldb_ci vulnerability_cvss2_vuldb_ii vulnerability_cvss2_vuldb_ai vulnerability_cvss2_vuldb_e vulnerability_cvss2_vuldb_rl vulnerability_cvss2_vuldb_rc vulnerability_cvss3_meta_basescore vulnerability_cvss3_meta_tempscore vulnerability_cvss3_vuldb_basescore vulnerability_cvss3_vuldb_tempscore vulnerability_cvss3_vuldb_av vulnerability_cvss3_vuldb_ac vulnerability_cvss3_vuldb_pr vulnerability_cvss3_vuldb_ui vulnerability_cvss3_vuldb_s vulnerability_cvss3_vuldb_c vulnerability_cvss3_vuldb_i vulnerability_cvss3_vuldb_a vulnerability_cvss3_vuldb_e vulnerability_cvss3_vuldb_rl vulnerability_cvss3_vuldb_rc advisory_date advisory_url exploit_price_0day countermeasure_name countermeasure_upgrade_version countermeasure_upgrade_url countermeasure_patch_name countermeasure_patch_url source_cve source_cve_assigned source_cve_nvd_summary
Complete: 🔍

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