Linux Kernel up to 6.1.5 Traffic Control Subsystem net/sched/sch_api.c qdisc_graft null pointer dereference

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

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel up to 6.1.5. This vulnerability affects the function qdisc_graft of the file net/sched/sch_api.c of the component Traffic Control Subsystem. Performing a manipulation results in null pointer dereference. This vulnerability is cataloged as CVE-2022-47929. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.1.5 (Operating System). It has been classified as problematic. This affects the function qdisc_graft of the file net/sched/sch_api.c of the component Traffic Control Subsystem. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. The summary by CVE is:

In the Linux kernel before 6.1.6, a NULL pointer dereference bug in the traffic control subsystem allows an unprivileged user to trigger a denial of service (system crash) via a crafted traffic control configuration that is set up with "tc qdisc" and "tc class" commands. This affects qdisc_graft in net/sched/sch_api.c.

The weakness was shared 01/18/2023. It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2022-47929 since 12/22/2022. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.1.6 eliminates this vulnerability. The upgrade is hosted for download at cdn.kernel.org. Applying a patch 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.

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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

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

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / 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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.1.6
Patch: git.kernel.org

Timelineinfo

12/22/2022 🔍
01/18/2023 +27 days 🔍
01/18/2023 +0 days 🔍
04/05/2025 +807 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2022-47929 (🔍)
GCVE (CVE): GCVE-0-2022-47929
GCVE (VulDB): GCVE-100-218859

Entryinfo

Created: 01/18/2023 08:02
Updated: 04/05/2025 01:22
Changes: 01/18/2023 08:02 (46), 02/14/2023 19:14 (10), 04/05/2025 01:22 (16)
Complete: 🔍
Cache ID: 216::103

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