Linux Kernel up to 5.17.14/5.18.3 huge_memory xas_split_alloc 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 5.17.14/5.18.3. The affected element is the function xas_split_alloc of the component huge_memory. The manipulation leads to memory leak. This vulnerability is referenced as CVE-2022-49334. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 5.17.14/5.18.3. This issue affects the function xas_split_alloc of the component huge_memory. The manipulation with an unknown input leads to a memory leak vulnerability. Using CWE to declare the problem leads to CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: mm/huge_memory: Fix xarray node memory leak If xas_split_alloc() fails to allocate the necessary nodes to complete the xarray entry split, it sets the xa_state to -ENOMEM, which xas_nomem() then interprets as "Please allocate more memory", not as "Please free any unnecessary memory" (which was the intended outcome). It's confusing to use xas_nomem() to free memory in this context, so call xas_destroy() instead.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2022-49334 since 02/26/2025. Technical details are known, but no exploit is available.

Upgrading to version 5.17.15 or 5.18.4 eliminates this vulnerability. Applying the patch c0c84962e297927ba57fd6ddc2bb000c9d149655/95c8181b4947e000f3b9b8e5918d899fce77b93d/69a37a8ba1b408a1c7616494aa7018e4b3844cbe 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.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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: 5.7
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 5.17.15/5.18.4
Patch: c0c84962e297927ba57fd6ddc2bb000c9d149655/95c8181b4947e000f3b9b8e5918d899fce77b93d/69a37a8ba1b408a1c7616494aa7018e4b3844cbe

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-2022-49334 (🔍)
GCVE (CVE): GCVE-0-2022-49334
GCVE (VulDB): GCVE-100-296885

Entryinfo

Created: 02/26/2025 08:14
Changes: 02/26/2025 08:14 (59)
Complete: 🔍
Cache ID: 216::103

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