Linux Kernel up to 5.11.15 ixgbe q_vector napi_id null pointer dereference

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

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 5.11.15. This affects the function q_vector of the component ixgbe. The manipulation of the argument napi_id results in null pointer dereference. This vulnerability is known as CVE-2021-46916. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.11.15 (Operating System). It has been classified as critical. Affected is the function q_vector of the component ixgbe. The manipulation of the argument napi_id 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. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: ixgbe: Fix NULL pointer dereference in ethtool loopback test The ixgbe driver currently generates a NULL pointer dereference when performing the ethtool loopback test. This is due to the fact that there isn't a q_vector associated with the test ring when it is setup as interrupts are not normally added to the test rings. To address this I have added code that will check for a q_vector before returning a napi_id value. If a q_vector is not present it will return a value of 0.

The weakness was published 02/27/2024. The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2021-46916 since 02/25/2024. Technical details are known, but there is no available exploit.

Upgrading to version 5.11.16 or 5.12 eliminates this vulnerability. Applying the patch 758d19098df4/31166efb1cee 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.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

Version

License

Website

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

AVACAuCIA
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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: No
Local: No
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 5.11.16/5.12
Patch: 758d19098df4/31166efb1cee

Timelineinfo

02/25/2024 🔍
02/27/2024 +2 days 🔍
02/27/2024 +0 days 🔍
02/27/2024 +0 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2021-46916 (🔍)
GCVE (CVE): GCVE-0-2021-46916
GCVE (VulDB): GCVE-100-254850

Entryinfo

Created: 02/27/2024 08:20
Changes: 02/27/2024 08:20 (45)
Complete: 🔍
Cache ID: 216::103

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