CVE-2026-64445

Kernel memory corruption via malformed Wi-Fi authentication

Published Jul 25, 2026 · Updated Jul 25, 2026

Out-of-bounds access in Linux Kernel allows physically proximate attackers to corrupt kernel memory via crafted Wi-Fi authentication frames. OnAuth() passes an unchecked short protected-frame length into rtw_wep_decrypt(), where subtraction underflows, and compares 128 challenge bytes without validating the IE length. An RTL8723BS interface must operate in AP mode; no authentication is required, and exploitation can corrupt heap state, crash the kernel, or hang the host.

CVSS severity8.8
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in Linux Kernel allows physically proximate attackers to corrupt kernel memory via crafted Wi-Fi authentication frames. OnAuth() passes an unchecked short protected-frame length into rtw_wep_decrypt(), where subtraction underflows, and compares 128 challenge bytes without validating the IE length. An RTL8723BS interface must operate in AP mode; no authentication is required, and exploitation can corrupt heap state, crash the kernel, or hang the host.

The record

CVE
CVE-2026-64445
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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=4.12
  2. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <1f6c9d255bdda41216b6e34c96aa2b1abee0bb84
  3. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <3e44a7665f3abd320a80d9c64ee4a93317041b8b
  4. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <64ec4192d9c10e96922245d4a6747304cc76b19d
  5. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <665e1ecb68b4e8419604e70a33f02d1c8b0222c6
  6. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <87cccc2a767f17dcab71e3b9fe5ae29b5516c5ce
  7. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <a1fc19d61f661d47204f095b593de507884849f7
  8. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <c9000c93078e5c0a5a651b077c0ec92a4bc7d580
  9. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <d90b9f39f375c9826ef145605dfe97765d0ecb91

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.12; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <1f6c9d255bdda41216b6e34c96aa2b1abee0bb84; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <3e44a7665f3abd320a80d9c64ee4a93317041b8b; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <64ec4192d9c10e96922245d4a6747304cc76b19d; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <665e1ecb68b4e8419604e70a33f02d1c8b0222c6; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <87cccc2a767f17dcab71e3b9fe5ae29b5516c5ce; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <a1fc19d61f661d47204f095b593de507884849f7; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <c9000c93078e5c0a5a651b077c0ec92a4bc7d580; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <d90b9f39f375c9826ef145605dfe97765d0ecb91

Published CVSS scores

8.8kernel.orgCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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