CVE-2024-35964: Bluetooth: ISO: Fix not validating setsockopt user input
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: ISO: Fix not validating setsockopt user input
Check user input length before copying data.
Security readout for executives and security teams
Plain-English summary
CVE-2024-35964 is a Linux kernel Bluetooth ISO issue where the kernel failed to validate user-provided setsockopt input length before copying data. The public record confirms a kernel fix, but does not provide CVSS, impact details, or active exploitation evidence.
Executive priority
Prioritize through the normal kernel patch cycle unless local exposure is high or Bluetooth-capable Linux devices are broadly deployed. Escalate if vendor advisories later assign high severity or confirm exploitable impact.
Technical view
The flaw is in Linux kernel Bluetooth ISO setsockopt handling. The fix adds input length validation before copying user data. Affected data indicates Linux 6.x kernel lines and stable commit references, but the public bundle does not define a CWE, attack vector, or concrete impact.
Likely exposure
Exposure is most relevant to systems running affected Linux 6.x kernels with Bluetooth ISO functionality present. Servers, laptops, embedded systems, and Debian LTS environments should be checked through vendor kernel package status, not only upstream version strings.
Exploitation context
The provided sources do not show CISA KEV listing, public exploitation, exploit availability, or real-world abuse. Because impact and vector details are incomplete, treat this as a kernel hardening update requiring normal vulnerability-management review.
Researcher notes
The public record is sparse: no CVSS, CWE, exploit status, or detailed impact is included. Analysis should focus on the upstream patch, distro backports, kernel configuration, and whether reachable local userspace can exercise the affected Bluetooth ISO option path.
Mitigation direction
Apply vendor kernel updates that include the referenced stable fixes.
For Debian LTS systems, review and apply the January 2025 security update.
Check distribution advisories for backported fixes before relying on version numbers.
Disable unnecessary Bluetooth functionality where operationally acceptable until patched.
Validation and detection
Inventory Linux kernel versions across affected endpoints and servers.
Confirm installed kernel packages include the relevant upstream stable fix commits.
Check whether Bluetooth and Bluetooth ISO support are enabled on in-scope systems.
Review vendor advisories for platform-specific affected and fixed versions.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2024-35964 mapping review
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