Linux Kernel up to 5.17.13/5.18.2 string_helpers devm_kasprintf_strarray memory leak

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 5.17.13/5.18.2. Impacted is the function devm_kasprintf_strarray of the component string_helpers. This manipulation causes memory leak. This vulnerability appears as CVE-2022-49403. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.17.13/5.18.2. Affected by this vulnerability is the function devm_kasprintf_strarray of the component string_helpers. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: lib/string_helpers: fix not adding strarray to device's resource list Add allocated strarray to device's resource list. This is a must to automatically release strarray when the device disappears. Without this fix we have a memory leak in the few drivers which use devm_kasprintf_strarray().

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2022-49403 since 02/26/2025. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 5.17.14 or 5.18.3 eliminates this vulnerability. Applying the patch a152eb42fcecfe41239c3c6695342f3a128593e7/bf29edab0c9ff3d2633b8306a67d04c357e2a385/cd290a9839cee2f6641558877e707bd373c8f6f1 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.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

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 5.17.14/5.18.3
Patch: a152eb42fcecfe41239c3c6695342f3a128593e7/bf29edab0c9ff3d2633b8306a67d04c357e2a385/cd290a9839cee2f6641558877e707bd373c8f6f1

Timelineinfo

02/26/2025 🔍
02/26/2025 +0 days 🔍
02/26/2025 +0 days 🔍
02/26/2025 +0 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2022-49403 (🔍)
GCVE (CVE): GCVE-0-2022-49403
GCVE (VulDB): GCVE-100-296983

Entryinfo

Created: 02/26/2025 09:11
Changes: 02/26/2025 09:11 (59)
Complete: 🔍
Cache ID: 216::103

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