Linux Kernel up to 5.12.9 net/nfc/llcp_sock.c getsockname null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel up to 5.12.9. The affected element is the function getsockname of the file net/nfc/llcp_sock.c. This manipulation causes null pointer dereference. This vulnerability appears as CVE-2021-38208. The attack requires local access. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 5.12.9 (Operating System) and classified as problematic. Affected by this vulnerability is the function getsockname of the file net/nfc/llcp_sock.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability.

The weakness was presented 08/09/2021 as 4ac06a1e013cf5fdd963317ffd3b968560f33bba. The advisory is shared at github.com. This vulnerability is known as CVE-2021-38208. Technical details are known, but no exploit is available.

Upgrading to version 5.12.10 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 github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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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: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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 5.12.10
Patch: github.com

Timelineinfo

08/08/2021 🔍
08/09/2021 +1 days 🔍
08/09/2021 +0 days 🔍
08/14/2021 +5 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 4ac06a1e013cf5fdd963317ffd3b968560f33bba
Status: Confirmed

CVE: CVE-2021-38208 (🔍)
GCVE (CVE): GCVE-0-2021-38208
GCVE (VulDB): GCVE-100-180373

Entryinfo

Created: 08/09/2021 07:11
Updated: 08/14/2021 11:05
Changes: 08/09/2021 07:11 (44), 08/14/2021 10:59 (2), 08/14/2021 11:05 (18)
Complete: 🔍
Cache ID: 216::103

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