CVE-2024-35964

Unsafe option copy via unchecked ISO optlen

Published May 20, 2024 · Updated May 11, 2026

Improper input validation in the Linux kernel starting with 6.0 allows local users to trigger unsafe Bluetooth ISO socket option copies. The iso_sock_setsockopt function copies BT_DEFER_SETUP, BT_PKT_STATUS, BT_ISO_QOS, and BT_ISO_BASE values without first rejecting an optlen shorter than the destination object. A local low-privileged process must create an ISO socket and supply a malformed setsockopt buffer; public sources do not document a demonstrated end effect.

CVSS severity7.1
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

Improper input validation in the Linux kernel starting with 6.0 allows local users to trigger unsafe Bluetooth ISO socket option copies. The iso_sock_setsockopt function copies BT_DEFER_SETUP, BT_PKT_STATUS, BT_ISO_QOS, and BT_ISO_BASE values without first rejecting an optlen shorter than the destination object. A local low-privileged process must create an ISO socket and supply a malformed setsockopt buffer; public sources do not document a demonstrated end effect.

The record

CVE
CVE-2024-35964
Published
May 20, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-1284
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.0
  2. Affected versionversion=ccf74f2390d60a2f9a75ef496d2564abb478f46a <0c4a89f4690478969729c7ba5f69d53d8516aa12
  3. Affected versionversion=ccf74f2390d60a2f9a75ef496d2564abb478f46a <6a6baa1ee7a9df33adbf932305053520b9741b35
  4. Affected versionversion=ccf74f2390d60a2f9a75ef496d2564abb478f46a <9e8742cdfc4b0e65266bb4a901a19462bda9285e
  5. Affected versionversion=ccf74f2390d60a2f9a75ef496d2564abb478f46a <cec736e60dc18d91b88af28d96664bff284b02d1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.0; version=ccf74f2390d60a2f9a75ef496d2564abb478f46a <0c4a89f4690478969729c7ba5f69d53d8516aa12; version=ccf74f2390d60a2f9a75ef496d2564abb478f46a <6a6baa1ee7a9df33adbf932305053520b9741b35; version=ccf74f2390d60a2f9a75ef496d2564abb478f46a <9e8742cdfc4b0e65266bb4a901a19462bda9285e; version=ccf74f2390d60a2f9a75ef496d2564abb478f46a <cec736e60dc18d91b88af28d96664bff284b02d1

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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