Linux Kernel up to 5.17.1 dma_request_channel reference count

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

Summaryinfo

A vulnerability has been found in Linux Kernel up to 5.17.1 and classified as critical. This affects the function dma_request_channel. The manipulation leads to reference count. This vulnerability is listed as CVE-2022-49212. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.17.1. It has been rated as critical. This issue affects the function dma_request_channel. The manipulation with an unknown input leads to a reference count vulnerability. Using CWE to declare the problem leads to CWE-911. The product uses a reference count to manage a resource, but it does not update or incorrectly updates the reference count. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: mtd: rawnand: atmel: fix refcount issue in atmel_nand_controller_init The reference counting issue happens in several error handling paths on a refcounted object "nc->dmac". In these paths, the function simply returns the error code, forgetting to balance the reference count of "nc->dmac", increased earlier by dma_request_channel(), which may cause refcount leaks. Fix it by decrementing the refcount of specific object in those error paths.

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2022-49212 since 02/26/2025. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 240793 (SUSE SLES12 Security Update : kernel (SUSE-SU-2025:01983-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.14.276, 4.19.238, 5.4.189, 5.10.110, 5.15.33, 5.16.19 or 5.17.2 eliminates this vulnerability. Applying the patch 0856bf27057561f42b37df111603cf5a0d040294/9843c9c98f26c6ad843260b19bfdaa2598f2ae1e/9b08d211db4c447eb1a07df65e45e0aa772e0fa6/a3587259ae553e41d1ce8c7435351a5d6b299a11/fe0e2ce5c87e9c0b9485ff566362030aa55972cf/8baea2b96fa90af8d0f937caf4cf2105ee094d93/f1694169f3674cdf7553aed06864254635679878/fecbd4a317c95d73c849648c406bcf1b6a0ec1cf 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 (240793). 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: 5.6
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: Reference count
CWE: CWE-911 / CWE-664
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: 240793
Nessus Name: SUSE SLES12 Security Update : kernel (SUSE-SU-2025:01983-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.14.276/4.19.238/5.4.189/5.10.110/5.15.33/5.16.19/5.17.2
Patch: 0856bf27057561f42b37df111603cf5a0d040294/9843c9c98f26c6ad843260b19bfdaa2598f2ae1e/9b08d211db4c447eb1a07df65e45e0aa772e0fa6/a3587259ae553e41d1ce8c7435351a5d6b299a11/fe0e2ce5c87e9c0b9485ff566362030aa55972cf/8baea2b96fa90af8d0f937caf4cf2105ee094d93/f1694169f3674cdf7553aed06864254635679878/fecbd4a317c95d73c849648c406bcf1b6a0ec1cf

Timelineinfo

02/26/2025 🔍
02/26/2025 +0 days 🔍
02/26/2025 +0 days 🔍
06/28/2025 +122 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2022-49212 (🔍)
GCVE (CVE): GCVE-0-2022-49212
GCVE (VulDB): GCVE-100-297503

Entryinfo

Created: 02/26/2025 11:59
Updated: 06/28/2025 02:29
Changes: 02/26/2025 11:59 (58), 03/19/2025 05:19 (11), 06/28/2025 02:29 (2)
Complete: 🔍
Cache ID: 216::103

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