Linux Kernel up to 5.19.6 mm/rmap.c anon_vma use after free

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.19.6 and classified as critical. This issue affects the function anon_vma of the file mm/rmap.c. Such manipulation leads to use after free. This vulnerability is listed as CVE-2022-42703. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 5.19.6 (Operating System). Affected by this issue is the function anon_vma of the file mm/rmap.c. 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. CVE summarizes:

mm/rmap.c in the Linux kernel before 5.19.7 has a use-after-free related to leaf anon_vma double reuse.

The weakness was presented 10/10/2022. The advisory is shared for download at bugs.chromium.org. This vulnerability is handled as CVE-2022-42703 since 10/09/2022. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 236642 (Alibaba Cloud Linux 3 : 0042: cloud-kernel bugfix, enhancement and (ALINUX3-SA-2023:0042)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.19.7 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.

The vulnerability is also documented in the vulnerability database at Tenable (236642). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

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

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 236642
Nessus Name: Alibaba Cloud Linux 3 : 0042: cloud-kernel bugfix, enhancement and (ALINUX3-SA-2023:0042)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.19.7
Patch: git.kernel.org

Timelineinfo

10/09/2022 🔍
10/10/2022 +1 days 🔍
10/10/2022 +0 days 🔍
05/19/2025 +952 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 2555283eb40df89945557273121e9393ef9b542b
Status: Confirmed

CVE: CVE-2022-42703 (🔍)
GCVE (CVE): GCVE-0-2022-42703
GCVE (VulDB): GCVE-100-210368

Entryinfo

Created: 10/10/2022 07:54
Updated: 05/19/2025 08:05
Changes: 10/10/2022 07:54 (44), 10/31/2022 14:17 (12), 05/19/2025 08:05 (16)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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