CVE-2025-22007: Bluetooth: Fix error code in chan_alloc_skb_cb()
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: Fix error code in chan_alloc_skb_cb()
The chan_alloc_skb_cb() function is supposed to return error pointers on
error. Returning NULL will lead to a NULL dereference.
Security readout for executives and security teams
Plain-English summary
CVE-2025-22007 is a Linux kernel Bluetooth flaw that can crash affected systems. It requires local access with low privileges, so it is not a remote internet-facing bug. The main business risk is service disruption on Linux endpoints or servers running affected kernels.
Executive priority
Handle through normal kernel patch cycles, faster for shared systems, developer workstations, and hosts with untrusted local users. This is not currently an emergency internet-exposed threat based on provided sources.
Technical view
The Linux Bluetooth function chan_alloc_skb_cb() returned NULL where an error pointer was expected. That can trigger a NULL pointer dereference, classified as CWE-476. CVSS 3.1 is 5.5: local attack vector, low complexity, low privileges, no user interaction, and high availability impact.
Likely exposure
Exposure is limited to Linux systems running affected kernel versions with the vulnerable Bluetooth code. The source bundle lists Linux kernel versions including 5.4.292, 5.10.236, 5.15.180, 6.1.132, 6.6.85, 6.12.21, 6.13.9, and 6.14 as affected.
Exploitation context
Sources do not show active exploitation, and the CVE is not marked KEV. The CVSS vector indicates exploitation requires local access and low privileges. Impact is availability only; no confidentiality or integrity impact is listed.
Researcher notes
The fix changes error handling in chan_alloc_skb_cb() to return error pointers rather than NULL. Public sources identify stable kernel commits and Debian LTS advisories, but do not provide exploit details or evidence of exploitation.
Mitigation direction
Apply Linux kernel updates from your distribution or vendor guidance.
Review Debian LTS advisories if running affected Debian kernel packages.
Prioritize systems where local users or untrusted workloads exist.
Reboot after kernel updates so the fixed kernel is active.
Validation and detection
Inventory Linux kernel versions across endpoints and servers.
Compare installed kernels against vendor advisories and fixed stable commits.
Confirm the running kernel changed after reboot.
Track remediation through package manager or configuration management evidence.
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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cwe · low confidence lookup
CWE-476: Exact CWE lookup
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CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
CWE-476 · source CWE mapping
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.