Security readout for executives and security teams
Plain-English summary
CVE-2024-26886 is a Linux kernel Bluetooth flaw that can deadlock Bluetooth receive processing. The direct business risk is service disruption on systems using affected kernels with Bluetooth exposed locally or nearby. The sources do not show data theft, privilege escalation, or confirmed active exploitation.
Executive priority
Treat this as a moderate operational risk. It is not shown to enable data compromise, but nearby unauthenticated attackers may affect availability on Bluetooth-enabled Linux devices. Patch through normal kernel update channels, with priority for mobile, physical-accessible, and operationally sensitive devices.
Technical view
The issue is in Linux Bluetooth af_bluetooth locking during recvmsg and bt_sock_ioctl. Taking sock_lock in the receive path can deadlock; the kernel fix uses sk_receive_queue.lock instead to avoid the use-after-free risk. CVSS 3.1 is 6.5 with adjacent network access and high availability impact.
Likely exposure
Exposure is most likely on Linux systems running affected kernel builds with Bluetooth enabled and reachable by a nearby attacker. Servers without Bluetooth hardware or with Bluetooth disabled have materially lower practical exposure. Exact affected status should be verified against distro kernel backports and the referenced stable commits.
Exploitation context
The CVE record does not identify public exploitation or KEV listing. The attack vector is adjacent network, with no privileges or user interaction required. The documented impact is availability: a blocked Bluetooth worker path can degrade or disrupt Bluetooth functionality or affected kernel processing.
Researcher notes
The source bundle is limited to the CVE description, CVSS vector, affected Linux kernel entries, and upstream stable commit references. It does not provide proof-of-concept details, distribution-specific package names, or evidence of exploitation in the wild.
Mitigation direction
- Update to a vendor kernel containing the referenced stable Bluetooth locking fix.
- If Bluetooth is unnecessary, disable Bluetooth adapters or services on affected systems.
- Prioritize laptops, kiosks, edge devices, and IoT systems with Bluetooth enabled.
- Check Linux distribution advisories for backported fixes matching your kernel package.
- Avoid direct wrangler or unrelated deployment actions; this is an OS patching issue.
Validation and detection
- Inventory Linux kernel versions and Bluetooth hardware across managed assets.
- Confirm whether Bluetooth services or adapters are enabled on each exposed device.
- Map kernel builds to vendor advisories or the referenced stable commits.
- Review system logs for Bluetooth worker stalls, deadlock reports, or availability symptoms.
- Track remediation through kernel package version, not only upstream version strings.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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-416: Exact CWE lookup
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Open ATT&CK lookupCVE-2024-26886 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H2.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/60673f442984fe689d4127a5dd4be414247b3d67CVE reference, Linux
- https://git.kernel.org/stable/c/64be3c6154886200708da0dfe259705fb992416cCVE reference, Linux
- https://git.kernel.org/stable/c/817e8138ce86001b2fa5c63d6ede756e205a01f7CVE reference, Linux
- https://git.kernel.org/stable/c/2c9e2df022ef8b9d7fac58a04a2ef4ed25288955CVE reference, Linux
- https://git.kernel.org/stable/c/f7b94bdc1ec107c92262716b073b3e816d4784fbCVE reference, Linux
- https://git.kernel.org/stable/c/cb8adca52f306563d958a863bb0cbae9c184d1aeCVE reference, CVE · x_transferred
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.