LiveActive security incident?Get immediate response
CVE Record

CVE-2023-54214: Bluetooth: L2CAP: Fix potential user-after-free

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix potential user-after-free This fixes all instances of which requires to allocate a buffer calling alloc_skb which may release the chan lock and reacquire later which makes it possible that the chan is disconnected in the meantime.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2023-54214 is a Linux kernel Bluetooth L2CAP memory-safety flaw. The source says a buffer allocation path can release and later reacquire a channel lock, allowing the channel to disconnect in between and creating a potential use-after-free. No CVSS score, impact rating, or active exploitation evidence is provided.

Executive priority

Handle through normal kernel vulnerability management, escalating where Bluetooth is enabled on laptops, workstations, embedded devices, or physical-access environments. Urgency is constrained by missing CVSS, impact detail, and exploitation evidence.

Technical view

The issue is in Linux Bluetooth L2CAP. During paths requiring alloc_skb, the channel lock may be dropped and reacquired, so chan state can change or disconnect before later use. Stable kernel commits are listed as fixes. The bundle does not define attack prerequisites, impact, or affected distribution package names.

Likely exposure

Exposure is most relevant to Linux systems running affected kernel versions with Bluetooth/L2CAP functionality present. The source lists Linux kernel versions and stable commits, but not specific distributions, configurations, hardware requirements, or remotely reachable conditions.

Exploitation context

The bundle does not show CISA KEV listing, exploit reports, public exploit code, or observed attacks. Treat exploitation status as not evidenced, not as impossible. The source also does not state whether exploitation requires local, adjacent, or paired Bluetooth access.

Researcher notes

Key uncertainty is exploitability. The root condition is a race around alloc_skb lock release/reacquisition and L2CAP channel lifetime. Review the referenced stable commits and downstream distro backports when validating whether a specific kernel build contains the fix.

Mitigation direction

  • Update to a vendor-supported kernel containing the listed stable fixes.
  • Check Linux distribution advisories for the package version carrying this fix.
  • Prioritize systems where Bluetooth is enabled or required for operations.
  • If patching is delayed, follow vendor guidance for temporary exposure reduction.

Validation and detection

  • Inventory Linux kernel versions across endpoints, servers, appliances, and embedded devices.
  • Confirm whether Bluetooth support is enabled or loaded on each affected system.
  • Map installed kernels to vendor advisories or the referenced stable commits.
  • Verify patched systems boot into the remediated kernel, not only install it.
Prepared
Confidence
medium
Sources
10

Public sources used

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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2023-54214 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
0ADP providers
9Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxa6a5568c03c4805d4d250f6bd9d468eeeb4ea059, a6a5568c03c4805d4d250f6bd9d468eeeb4ea059, a6a5568c03c4805d4d250f6bd9d468eeeb4ea059, a6a5568c03c4805d4d250f6bd9d468eeeb4ea059, a6a5568c03c4805d4d250f6bd9d468eeeb4ea059, a6a5568c03c4805d4d250f6bd9d468eeeb4ea059, a6a5568c03c4805d4d250f6bd9d468eeeb4ea059, a6a5568c03c4805d4d250f6bd9d468eeeb4ea059unaffected
LinuxLinux3.5, 0, 4.14.308, 4.19.276, 5.4.235, 5.10.173, 5.15.99, 6.1.16, 6.2.3, 6.3affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.