CVE-2026-64536Hinoki check available

Memory exposure and crash via unchecked wireless IEs

Published Jul 27, 2026 · Updated Jul 27, 2026

Out-of-bounds reads in Linux Kernel's rtl8723bs Wi-Fi driver allow adjacent attackers to expose memory or crash affected systems. The is_ap_in_tkip() loop dereferences information-element headers before confirming they fit within ie_length and reads fixed payload offsets without validating element lengths. Exposure requires the rtl8723bs driver to process malformed nearby wireless information elements; the published impact is limited to confidentiality and availability.

CVSS severity8.1
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Out-of-bounds reads in Linux Kernel's rtl8723bs Wi-Fi driver allow adjacent attackers to expose memory or crash affected systems. The is_ap_in_tkip() loop dereferences information-element headers before confirming they fit within ie_length and reads fixed payload offsets without validating element lengths. Exposure requires the rtl8723bs driver to process malformed nearby wireless information elements; the published impact is limited to confidentiality and availability.

The record

CVE
CVE-2026-64536
Published
Jul 27, 2026
Updated
Jul 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 27, 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 <204b22c8df115370037248859bf0fa62db73a396
  3. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <3bf39f711ff27c64be8680a8938bcc5001982e81
  4. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <4380b3860d887a13555ff024a58dfc05b490dfd6
  5. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <6f26cc55affd9d7f88ae2f5d12db4ecf9072c209
  6. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <a6105ea8ca6ebbc04beaf3bcbf7dbb5985f5d395
  7. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <d2055332297e24c63fffda943ef7a5eefc0a6019
  8. Affected versionversion=554c0a3abf216c991c5ebddcdb2c08689ecd290b <ea3809f7e20bdff282b8cc1e94937d5fb9fb32c7

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.12; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <204b22c8df115370037248859bf0fa62db73a396; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <3bf39f711ff27c64be8680a8938bcc5001982e81; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <4380b3860d887a13555ff024a58dfc05b490dfd6; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <6f26cc55affd9d7f88ae2f5d12db4ecf9072c209; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <a6105ea8ca6ebbc04beaf3bcbf7dbb5985f5d395; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <d2055332297e24c63fffda943ef7a5eefc0a6019; version=554c0a3abf216c991c5ebddcdb2c08689ecd290b <ea3809f7e20bdff282b8cc1e94937d5fb9fb32c7

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.

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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

T1499.004Endpoint Denial of Service: Application 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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