CVE-2024-35856

Kernel memory corruption via coredump buffer double free

Published May 17, 2024 · Updated Aug 5, 2026

Double free in Linux 6.6 before 6.6.30, 6.7 through 6.8.8, and 6.9-rc1 through 6.9-rc5 allows physically proximate attackers to corrupt kernel memory. In btmtk_process_coredump(), hci_devcd_append() consumes and frees the socket buffer on error, but the caller frees that buffer again. Bluetooth must be enabled with a MediaTek controller; malformed radio frames require no pairing or user interaction and enable kernel-memory disclosure, modification, or a system crash.

CVSS severity8.8
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double free in Linux 6.6 before 6.6.30, 6.7 through 6.8.8, and 6.9-rc1 through 6.9-rc5 allows physically proximate attackers to corrupt kernel memory. In btmtk_process_coredump(), hci_devcd_append() consumes and frees the socket buffer on error, but the caller frees that buffer again. Bluetooth must be enabled with a MediaTek controller; malformed radio frames require no pairing or user interaction and enable kernel-memory disclosure, modification, or a system crash.

The record

CVE
CVE-2024-35856
Published
May 17, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415, T1203
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=0b70151328781a89c89e4cf3fae21fc0e98d869e <18bdb386a1a30e7a3d7732a98e45e69cf6b5710d
  2. Affected versionversion=0b70151328781a89c89e4cf3fae21fc0e98d869e <80dfef128cb9f1b1ef67c0fe8c8deb4ea7ad30c1
  3. Affected versionversion=0b70151328781a89c89e4cf3fae21fc0e98d869e <e20093c741d8da9f6390dd45d75b779861547035
  4. Affected versionversion=6.6

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0b70151328781a89c89e4cf3fae21fc0e98d869e <18bdb386a1a30e7a3d7732a98e45e69cf6b5710d; version=0b70151328781a89c89e4cf3fae21fc0e98d869e <80dfef128cb9f1b1ef67c0fe8c8deb4ea7ad30c1; version=0b70151328781a89c89e4cf3fae21fc0e98d869e <e20093c741d8da9f6390dd45d75b779861547035; version=6.6

Published CVSS scores

8.8LinuxCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-415Double Free
T1203Exploitation for Client Execution

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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