Linux Kernel up to 5.17.3 kmalloc_array null pointer dereference

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

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 5.17.3. Affected is the function kmalloc_array. This manipulation causes null pointer dereference. This vulnerability appears as CVE-2022-49055. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 5.17.3 and classified as critical. Affected by this vulnerability is the function kmalloc_array. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Check for potential null return of kmalloc_array() As the kmalloc_array() may return null, the 'event_waiters[i].wait' would lead to null-pointer dereference. Therefore, it is better to check the return value of kmalloc_array() to avoid this confusion.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2022-49055 since 02/26/2025. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 237099 (SUSE SLES12 Security Update : kernel (SUSE-SU-2025:01600-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.9.311, 4.14.276, 4.19.239, 5.4.190, 5.10.112, 5.15.35 or 5.17.4 eliminates this vulnerability. Applying the patch 32cf90a521dcc0f136db7ee5ba32bfe5f79e460e/40bf32dbfef866c83a3e74800b81d79e52b6d20b/94869bb0de69a812f70231b0eb480bb2f7ae73a6/c7a268b33882d5feaafd29c1734456f41ba41396/1d7a5aae884ca727d41c7ed15d4c82fdb67c040c/f2658d5966bcee8c3eb487875f459756d4f7cdfc/0a692c625e373fef692ffbc7fc41f8a025f01cb7/ebbb7bb9e80305820dc2328a371c1b35679f2667 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 databases at Tenable (237099) and EUVD (EUVD-2022-55149). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

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

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 237099
Nessus Name: SUSE SLES12 Security Update : kernel (SUSE-SU-2025:01600-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.9.311/4.14.276/4.19.239/5.4.190/5.10.112/5.15.35/5.17.4
Patch: 32cf90a521dcc0f136db7ee5ba32bfe5f79e460e/40bf32dbfef866c83a3e74800b81d79e52b6d20b/94869bb0de69a812f70231b0eb480bb2f7ae73a6/c7a268b33882d5feaafd29c1734456f41ba41396/1d7a5aae884ca727d41c7ed15d4c82fdb67c040c/f2658d5966bcee8c3eb487875f459756d4f7cdfc/0a692c625e373fef692ffbc7fc41f8a025f01cb7/ebbb7bb9e80305820dc2328a371c1b35679f2667

Timelineinfo

02/26/2025 🔍
02/26/2025 +0 days 🔍
02/26/2025 +0 days 🔍
05/23/2025 +86 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2022-49055 (🔍)
GCVE (CVE): GCVE-0-2022-49055
GCVE (VulDB): GCVE-100-297373
EUVD: 🔍

Entryinfo

Created: 02/26/2025 11:23
Updated: 05/23/2025 06:38
Changes: 02/26/2025 11:23 (58), 03/19/2025 04:46 (11), 05/21/2025 16:32 (1), 05/23/2025 06:38 (2)
Complete: 🔍
Cache ID: 216::103

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