CVE-2026-74541

Kernel memory corruption via stale ISO pointer

Published Aug 15, 2026 · Updated Aug 15, 2026

Use-after-free in the Linux kernel Bluetooth ISO subsystem allows local users to trigger kernel memory corruption during socket teardown. iso_sock_disconn() clears conn->hcon without also clearing hcon->iso_data, leaving a stale pointer that iso_conn_free() later dereferences. The demonstrated result is a KASAN-detected slab use-after-free; code execution and privilege escalation are not publicly established.

CVSS severity7.0
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel Bluetooth ISO subsystem allows local users to trigger kernel memory corruption during socket teardown. iso_sock_disconn() clears conn->hcon without also clearing hcon->iso_data, leaving a stale pointer that iso_conn_free() later dereferences. The demonstrated result is a KASAN-detected slab use-after-free; code execution and privilege escalation are not publicly established.

The record

CVE
CVE-2026-74541
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=6.5.12 <6.6
  2. Affected versionversion=6.6
  3. Affected versionversion=c03a10bd5b6ccb22921e04bcddc987410df7e7a9
  4. Affected versionversion=fbdc4bc47268953c80853489f696e02d61f9a2c6 <63c0f396a18b767eb28e895eb95bbdce6c172c59
  5. Affected versionversion=fbdc4bc47268953c80853489f696e02d61f9a2c6 <69a4a7b162b3db6ac337e3094cdee38f24d42ff7
  6. Affected versionversion=fbdc4bc47268953c80853489f696e02d61f9a2c6 <7b51a9c25e9698b64df9f2218f10eecf7dc7e2d0
  7. Affected versionversion=fbdc4bc47268953c80853489f696e02d61f9a2c6 <cc1d39946d62bc568551dfb81149724de1e91338
  8. Affected versionversion=fbdc4bc47268953c80853489f696e02d61f9a2c6 <d57e506f6a1e3929611340fae87c1e4823f4d85c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.5.12 <6.6; version=6.6; version=c03a10bd5b6ccb22921e04bcddc987410df7e7a9; version=fbdc4bc47268953c80853489f696e02d61f9a2c6 <63c0f396a18b767eb28e895eb95bbdce6c172c59; version=fbdc4bc47268953c80853489f696e02d61f9a2c6 <69a4a7b162b3db6ac337e3094cdee38f24d42ff7; version=fbdc4bc47268953c80853489f696e02d61f9a2c6 <7b51a9c25e9698b64df9f2218f10eecf7dc7e2d0; version=fbdc4bc47268953c80853489f696e02d61f9a2c6 <cc1d39946d62bc568551dfb81149724de1e91338; version=fbdc4bc47268953c80853489f696e02d61f9a2c6 <d57e506f6a1e3929611340fae87c1e4823f4d85c

Published CVSS scores

7.0Oracle LinuxCVSS:3.1/AV:L/AC:H/PR:L/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.

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

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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