CVE-2026-46305

System crash via unchecked buffer allocation

Published Jun 8, 2026 · Updated Jun 8, 2026

NULL dereference in Linux Kernel 7.0 through 7.0.6 allows local users to crash the system through rtl8723bs buffer allocation. rtw_cbuf_alloc() unconditionally dereferences the structure returned by kzalloc_flex() without checking whether allocation returned NULL. Reachability requires the rtl8723bs staging Wi-Fi driver and an allocation failure; published assessments report availability loss only.

CVSS severity5.5
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL dereference in Linux Kernel 7.0 through 7.0.6 allows local users to crash the system through rtl8723bs buffer allocation. rtw_cbuf_alloc() unconditionally dereferences the structure returned by kzalloc_flex() without checking whether allocation returned NULL. Reachability requires the rtl8723bs staging Wi-Fi driver and an allocation failure; published assessments report availability loss only.

The record

CVE
CVE-2026-46305
Published
Jun 8, 2026
Updated
Jun 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.0
  2. Affected versionversion=980cd426a25747daf8ed25e2a1904b2d26ffbb3d <0a5f411becfb7c57aa89827213d31ef23a03d75a
  3. Affected versionversion=980cd426a25747daf8ed25e2a1904b2d26ffbb3d <bc851db06045a40c18233dd76ef0562d7f8bb6db

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=7.0; version=980cd426a25747daf8ed25e2a1904b2d26ffbb3d <0a5f411becfb7c57aa89827213d31ef23a03d75a; version=980cd426a25747daf8ed25e2a1904b2d26ffbb3d <bc851db06045a40c18233dd76ef0562d7f8bb6db

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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