Linux Kernel up to 5.19.5 xfrm __xfrm_policy_check reference count

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.19.5. It has been classified as critical. Affected by this issue is the function __xfrm_policy_check of the component xfrm. Performing a manipulation results in reference count. This vulnerability is reported as CVE-2022-50007. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.19.5. It has been classified as critical. This affects the function __xfrm_policy_check of the component xfrm. The manipulation with an unknown input leads to a reference count vulnerability. CWE is classifying the issue as CWE-911. The product uses a reference count to manage a resource, but it does not update or incorrectly updates the reference count. This is going to have an impact on availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: xfrm: fix refcount leak in __xfrm_policy_check() The issue happens on an error path in __xfrm_policy_check(). When the fetching process of the object `pols[1]` fails, the function simply returns 0, forgetting to decrement the reference count of `pols[0]`, which is incremented earlier by either xfrm_sk_policy_lookup() or xfrm_policy_lookup(). This may result in memory leaks. Fix it by decreasing the reference count of `pols[0]` in that path.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2022-50007 since 06/18/2025. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 247361 (Linux Distros Unpatched Vulnerability : CVE-2022-50007), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.9.327, 4.14.292, 4.19.257, 5.4.212, 5.10.140, 5.15.64 or 5.19.6 eliminates this vulnerability. Applying the patch 18e6b6e2555c93f5ca09f2b85ef1fa025c8accea/8f94b933103ee1bda119543369cc18a1be5536db/0769491a8acd3e85ca4c3f65080eac2c824262df/63da7a2bbf3f28094920e0b8a17d2571a9bd842d/1305d7d4f35ca6f214a2d23b075aa6a924cff3be/26ad2398fe4984f4f6f930bcb3bc9047fa77265b/d66c052879791313f90c0584420f196a038fb8b8/9c9cb23e00ddf45679b21b4dacc11d1ae7961ebe 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 (247361) and CERT Bund (WID-SEC-2025-1350). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel
  • RESF Rocky Linux
  • Dell Avamar
  • Dell NetWorker
  • Dell Secure Connect Gateway
  • IBM QRadar SIEM

Productinfo

Type

Vendor

Name

Version

License

Website

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
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 247361
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2022-50007

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 4.9.327/4.14.292/4.19.257/5.4.212/5.10.140/5.15.64/5.19.6
Patch: 18e6b6e2555c93f5ca09f2b85ef1fa025c8accea/8f94b933103ee1bda119543369cc18a1be5536db/0769491a8acd3e85ca4c3f65080eac2c824262df/63da7a2bbf3f28094920e0b8a17d2571a9bd842d/1305d7d4f35ca6f214a2d23b075aa6a924cff3be/26ad2398fe4984f4f6f930bcb3bc9047fa77265b/d66c052879791313f90c0584420f196a038fb8b8/9c9cb23e00ddf45679b21b4dacc11d1ae7961ebe

Timelineinfo

06/18/2025 Advisory disclosed
06/18/2025 +0 days CVE reserved
06/18/2025 +0 days VulDB entry created
11/30/2025 +165 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2022-50007 (🔒)
GCVE (CVE): GCVE-0-2022-50007
GCVE (VulDB): GCVE-100-313017
CERT Bund: WID-SEC-2025-1350 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 06/18/2025 14:58
Updated: 11/30/2025 18:56
Changes: 06/18/2025 14:58 (59), 07/18/2025 01:25 (7), 07/29/2025 07:02 (1), 08/11/2025 01:25 (2), 10/19/2025 02:33 (1), 11/15/2025 07:02 (11), 11/30/2025 18:56 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!