Linux Kernel up to 7.0.6/7.1-rc2 staging kzalloc_flex 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, which was classified as critical, has been found in Linux Kernel up to 7.0.6/7.1-rc2. The affected element is the function kzalloc_flex of the component staging. This manipulation causes null pointer dereference. This vulnerability is registered as CVE-2026-46305. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 7.0.6/7.1-rc2 and classified as critical. Affected by this vulnerability is the function kzalloc_flex of the component staging. 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 summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: os_dep: avoid NULL pointer dereference in rtw_cbuf_alloc The return value of kzalloc_flex() is used without ensuring that the allocation succeeded, and the pointer is dereferenced unconditionally. Guard the access to the allocated structure to avoid a potential NULL pointer dereference if the allocation fails.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2026-46305 since 05/13/2026. Technical details are known, but no exploit is available.

Upgrading to version 7.0.7 or 7.1-rc3 eliminates this vulnerability. Applying the patch 0a5f411becfb7c57aa89827213d31ef23a03d75a/bc851db06045a40c18233dd76ef0562d7f8bb6db 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.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Version

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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

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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 7.0.7/7.1-rc3
Patch: 0a5f411becfb7c57aa89827213d31ef23a03d75a/bc851db06045a40c18233dd76ef0562d7f8bb6db

Timelineinfo

05/13/2026 CVE reserved
06/08/2026 +26 days Advisory disclosed
06/08/2026 +0 days VulDB entry created
06/08/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-46305 (🔒)
GCVE (CVE): GCVE-0-2026-46305
GCVE (VulDB): GCVE-100-369265

Entryinfo

Created: 06/08/2026 20:15
Changes: 06/08/2026 20:15 (59)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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