Linux Kernel Socket Buffer sch_sfb cb use after free

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel. This vulnerability affects the function sch_sfb of the component Socket Buffer Handler. Such manipulation of the argument cb leads to use after free. This vulnerability is listed as CVE-2022-3586. The attack may be performed from remote. There is no available exploit. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel (Operating System) (affected version not known). Affected by this issue is the function sch_sfb of the component Socket Buffer Handler. The manipulation of the argument cb with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is availability. CVE summarizes:

A flaw was found in the Linux kernel’s networking code. A use-after-free was found in the way the sch_sfb enqueue function used the socket buffer (SKB) cb field after the same SKB had been enqueued (and freed) into a child qdisc. This flaw allows a local, unprivileged user to crash the system, causing a denial of service.

The weakness was presented 10/20/2022. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2022-3586 since 10/18/2022. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 236648 (Alibaba Cloud Linux 3 : 0002: cloud-kernel bugfix, enhancement and (ALINUX3-SA-2023:0002)), which helps to determine the existence of the flaw in a target environment.

Applying a patch 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 (236648). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
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: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 236648
Nessus Name: Alibaba Cloud Linux 3 : 0002: cloud-kernel bugfix, enhancement and (ALINUX3-SA-2023:0002)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

10/18/2022 🔍
10/20/2022 +2 days 🔍
10/20/2022 +0 days 🔍
05/18/2025 +941 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: DLA 3173-1
Status: Confirmed

CVE: CVE-2022-3586 (🔍)
GCVE (CVE): GCVE-0-2022-3586
GCVE (VulDB): GCVE-100-211808

Entryinfo

Created: 10/20/2022 08:15
Updated: 05/18/2025 21:54
Changes: 10/20/2022 08:15 (42), 11/18/2022 10:57 (1), 11/18/2022 11:03 (11), 05/09/2025 18:06 (15), 05/18/2025 21:54 (2)
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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