CVE-2026-43267

Kernel crash via zero beacon interval division

Published May 6, 2026 · Updated May 6, 2026

Divide-by-zero in Linux Kernel 6.18 through 6.18.15 and 6.19 through 6.19.5 allows local users to crash the kernel. The rtw89 beacon-tracking path in drivers/net/wireless/realtek/rtw89/core.c uses bss_conf->beacon_int as a divisor without first replacing a zero value. Exploitation requires local low-privileged access and execution of the affected Wi-Fi driver; the resulting division fault interrupts the system.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Divide-by-zero in Linux Kernel 6.18 through 6.18.15 and 6.19 through 6.19.5 allows local users to crash the kernel. The rtw89 beacon-tracking path in drivers/net/wireless/realtek/rtw89/core.c uses bss_conf->beacon_int as a divisor without first replacing a zero value. Exploitation requires local low-privileged access and execution of the affected Wi-Fi driver; the resulting division fault interrupts the system.

The record

CVE
CVE-2026-43267
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-369, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1260bee01493126cf9c872b6ca2af261173baa6d
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e00c9a4ec84c0bb067833b34202f457badbbc1c1
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <eb57be32f438c57c88d6ce756101c1dfbcc03bba

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1260bee01493126cf9c872b6ca2af261173baa6d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e00c9a4ec84c0bb067833b34202f457badbbc1c1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <eb57be32f438c57c88d6ce756101c1dfbcc03bba

Published CVSS scores

5.5NIST NVDCVSS: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.

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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-369Divide By Zero
T1499.004Application or System Exploitation

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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