Linux Kernel up to 6.1.1 serial pch_request_dma reference count

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5.5	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 6.1.1. This vulnerability affects the function pch_request_dma of the component serial. Executing a manipulation can lead to reference count. This vulnerability is tracked as CVE-2022-50576. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.1.1 and classified as critical. This vulnerability affects the function pch_request_dma of the component serial. The manipulation with an unknown input leads to a reference count vulnerability. The CWE definition for the vulnerability is CWE-911. The product uses a reference count to manage a resource, but it does not update or incorrectly updates the reference count. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: serial: pch: Fix PCI device refcount leak in pch_request_dma() As comment of pci_get_slot() says, it returns a pci_device with its refcount increased. The caller must decrement the reference count by calling pci_dev_put(). Since 'dma_dev' is only used to filter the channel in filter(), we can call pci_dev_put() before exiting from pch_request_dma(). Add the missing pci_dev_put() for the normal and error path.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2022-50576 since 10/22/2025. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 276821 (Linux Distros Unpatched Vulnerability : CVE-2022-50576), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.9.337, 4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.86, 6.0.16 or 6.1.2 eliminates this vulnerability. Applying the patch 90ff030ca10b69feeebda1427550ebf9ed2ad868/56e5a7c5ee3f0dc8978b5df2b1a98a1b060c5e2a/dfd15c5550b9190d5b0f9bcacb3e6436322f3854/d165388227aa7e46a9751b90bae6337b5335cdbb/07f4ca68b0f6bf84b6b391c14b59fd179fcde9c5/6f7d82380fbeaed3a940efc33c23f0c4bbd0fc02/4f5d28865c665c9064de631a518f9bc8099d9ce4/516614a371c26e3334625b4bca19a5362bf658d6/8be3a7bf773700534a6e8f87f6ed2ed111254be5 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 (276821) and CERT Bund (WID-SEC-2025-2394). Once again VulDB remains the best source for vulnerability data.

Affected

• Red Hat Enterprise Linux
• SUSE Linux
• Oracle Linux
• Open Source Linux Kernel
• Dell NetWorker

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.9.336
• 4.14.302
• 4.19.269
• 5.4.228
• 5.10.162
• 5.15.0
• 5.15.1
• 5.15.2
• 5.15.3
• 5.15.4
• 5.15.5
• 5.15.6
• 5.15.7
• 5.15.8
• 5.15.9
• 5.15.10
• 5.15.11
• 5.15.12
• 5.15.13
• 5.15.14
• 5.15.15
• 5.15.16
• 5.15.17
• 5.15.18
• 5.15.19
• 5.15.20
• 5.15.21
• 5.15.22
• 5.15.23
• 5.15.24
• 5.15.25
• 5.15.26
• 5.15.27
• 5.15.28
• 5.15.29
• 5.15.30
• 5.15.31
• 5.15.32
• 5.15.33
• 5.15.34
• 5.15.35
• 5.15.36
• 5.15.37
• 5.15.38
• 5.15.39
• 5.15.40
• 5.15.41
• 5.15.42
• 5.15.43
• 5.15.44
• 5.15.45
• 5.15.46
• 5.15.47
• 5.15.48
• 5.15.49
• 5.15.50
• 5.15.51
• 5.15.52
• 5.15.53
• 5.15.54
• 5.15.55
• 5.15.56
• 5.15.57
• 5.15.58
• 5.15.59
• 5.15.60
• 5.15.61
• 5.15.62
• 5.15.63
• 5.15.64
• 5.15.65
• 5.15.66
• 5.15.67
• 5.15.68
• 5.15.69
• 5.15.70
• 5.15.71
• 5.15.72
• 5.15.73
• 5.15.74
• 5.15.75
• 5.15.76
• 5.15.77
• 5.15.78
• 5.15.79
• 5.15.80
• 5.15.81
• 5.15.82
• 5.15.83
• 5.15.84
• 5.15.85
• 6.0.0
• 6.0.1
• 6.0.2
• 6.0.3
• 6.0.4
• 6.0.5
• 6.0.6
• 6.0.7
• 6.0.8
• 6.0.9
• 6.0.10
• 6.0.11
• 6.0.12
• 6.0.13
• 6.0.14
• 6.0.15
• 6.1.0
• 6.1.1

License

• open-source

Website

• Vendor: https://www.kernel.org/

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

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Reference count
CWE: CWE-911 / CWE-664
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 276821
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2022-50576

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 4.9.337/4.14.303/4.19.270/5.4.229/5.10.163/5.15.86/6.0.16/6.1.2
Patch: 90ff030ca10b69feeebda1427550ebf9ed2ad868/56e5a7c5ee3f0dc8978b5df2b1a98a1b060c5e2a/dfd15c5550b9190d5b0f9bcacb3e6436322f3854/d165388227aa7e46a9751b90bae6337b5335cdbb/07f4ca68b0f6bf84b6b391c14b59fd179fcde9c5/6f7d82380fbeaed3a940efc33c23f0c4bbd0fc02/4f5d28865c665c9064de631a518f9bc8099d9ce4/516614a371c26e3334625b4bca19a5362bf658d6/8be3a7bf773700534a6e8f87f6ed2ed111254be5

Timelineinfo

10/22/2025 Advisory disclosed
10/22/2025 +0 days CVE reserved
10/22/2025 +0 days VulDB entry created
02/28/2026 +129 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2022-50576 (🔒)
GCVE (CVE): GCVE-0-2022-50576
GCVE (VulDB): GCVE-100-329332
CERT Bund: WID-SEC-2025-2394 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 10/22/2025 16:30
Updated: 02/28/2026 08:30
Changes: 10/22/2025 16:30 (59), 10/24/2025 05:38 (7), 11/28/2025 17:14 (2), 01/02/2026 04:11 (1), 02/28/2026 08:30 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

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