Linux Kernel up to 5.18.14 net/xfrm/xfrm_policy.c xfrm_expand_policies denial of service

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Linux Kernel up to 5.18.14. The affected element is the function xfrm_expand_policies of the file net/xfrm/xfrm_policy.c. Such manipulation leads to denial of service. This vulnerability is uniquely identified as CVE-2022-36879. No exploit exists. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 5.18.14 (Operating System). Affected by this issue is the function xfrm_expand_policies of the file net/xfrm/xfrm_policy.c. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

An issue was discovered in the Linux kernel through 5.18.14. xfrm_expand_policies in net/xfrm/xfrm_policy.c can cause a refcount to be dropped twice.

The weakness was disclosed 07/27/2022 as f85daf0e725358be78dfd208dea5fd665d8cb901. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2022-36879 since 07/27/2022. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 233382 (Amazon Linux 2 : kernel (ALAS-2025-2790)), which helps to determine the existence of the flaw in a target environment.

Applying the patch f85daf0e725358be78dfd208dea5fd665d8cb901 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (233382). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Denial of service
CWE: 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: 233382
Nessus Name: Amazon Linux 2 : kernel (ALAS-2025-2790)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: f85daf0e725358be78dfd208dea5fd665d8cb901

Timelineinfo

07/27/2022 🔍
07/27/2022 +0 days 🔍
07/27/2022 +0 days 🔍
03/27/2025 +974 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: f85daf0e725358be78dfd208dea5fd665d8cb901
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2022-36879 (🔍)
GCVE (CVE): GCVE-0-2022-36879
GCVE (VulDB): GCVE-100-205112

Entryinfo

Created: 07/27/2022 08:57
Updated: 03/27/2025 20:17
Changes: 07/27/2022 08:57 (45), 08/27/2022 14:36 (11), 03/27/2025 20:17 (16)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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