Linux Kernel up to 5.15.4 mlx5e resync_handle_seq_match denial of service

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

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.15.4. It has been declared as critical. This issue affects the function resync_handle_seq_match of the component mlx5e. Executing a manipulation can lead to denial of service. This vulnerability appears as CVE-2021-47215. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.15.4. This vulnerability affects the function resync_handle_seq_match of the component mlx5e. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: kTLS, Fix crash in RX resync flow For the TLS RX resync flow, we maintain a list of TLS contexts that require some attention, to communicate their resync information to the HW. Here we fix list corruptions, by protecting the entries against movements coming from resync_handle_seq_match(), until their resync handling in napi is fully completed.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2021-47215. The exploitation appears to be easy. There are known technical details, but no exploit is available.

Upgrading to version 5.15.5 or 5.16 eliminates this vulnerability. Applying the patch ebeda7a9528a/cc4a9cc03faa 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

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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: 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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.15.5/5.16
Patch: ebeda7a9528a/cc4a9cc03faa

Timelineinfo

04/10/2024 🔍
04/10/2024 +0 days 🔍
04/10/2024 +0 days 🔍
03/28/2025 +352 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2021-47215 (🔍)
GCVE (CVE): GCVE-0-2021-47215
GCVE (VulDB): GCVE-100-260308

Entryinfo

Created: 04/10/2024 21:40
Updated: 03/28/2025 05:34
Changes: 04/10/2024 21:40 (57), 05/16/2024 14:12 (1), 03/28/2025 05:34 (12)
Complete: 🔍
Cache ID: 216::103

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