CVE-2026-64442

Kernel memory disclosure and crash via IE truncation

Published Jul 25, 2026 · Updated Jul 25, 2026

Out-of-bounds reads in Linux Kernel allow physically proximate attackers to disclose kernel memory or crash systems via crafted Wi-Fi frames. The issue_assocreq() and join_cmd_hdl() loops read pIE->length before verifying that a complete IE header remains in rtl8723bs buffers. A rogue AP needs no credentials or user action and can transmit kernel bytes in an association request or trigger a repeatable kernel fault.

CVSS severity8.1
High
EPSS probability0.29%
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 reads in Linux Kernel allow physically proximate attackers to disclose kernel memory or crash systems via crafted Wi-Fi frames. The issue_assocreq() and join_cmd_hdl() loops read pIE->length before verifying that a complete IE header remains in rtl8723bs buffers. A rogue AP needs no credentials or user action and can transmit kernel bytes in an association request or trigger a repeatable kernel fault.

The record

CVE
CVE-2026-64442
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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 <402f13ec95945f34a210b28df1f8740d3d4a58c5
  3. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <4c21eec80cf502d9ea18e0b946246b2376452786
  4. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <605ebd94d0f469204f3c9f2f84acc71e43e2780f
  5. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <a830bdc82461353bf7b1f8a2ad2689bf5d2de444
  6. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <ad2637c46ef8b8ae0894372a2d39fdfcdc420a1e
  7. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <bc881c9915c4468747d0ca5fd1abd7b313cfb0f4
  8. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <c38d16b1ffac385c9e4b38447cd5c46af1114b58
  9. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <ef61d628dfad38fead1fd2e08979ae9126d011d5

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.12; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <402f13ec95945f34a210b28df1f8740d3d4a58c5; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <4c21eec80cf502d9ea18e0b946246b2376452786; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <605ebd94d0f469204f3c9f2f84acc71e43e2780f; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <a830bdc82461353bf7b1f8a2ad2689bf5d2de444; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <ad2637c46ef8b8ae0894372a2d39fdfcdc420a1e; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <bc881c9915c4468747d0ca5fd1abd7b313cfb0f4; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <c38d16b1ffac385c9e4b38447cd5c46af1114b58; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <ef61d628dfad38fead1fd2e08979ae9126d011d5

Published CVSS scores

8.1kernel.orgCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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