CVE-2024-27416

Kernel compromise via Bluetooth pairing race

Published May 17, 2024 · Updated Aug 5, 2026

Memory corruption in the Linux kernel Bluetooth stack allows physically proximate attackers to compromise the kernel during pairing. The hci_io_capa_request_evt handler checks stale remote feature bits before HCI_OP_READ_REMOTE_EXT_FEATURES completes, then drops an hci_conn reference after wrongly treating SSP as unsupported. Bluetooth radio range and a connectable or accept-listed host are required; the refcount underflow permits use-after-free, kernel compromise, or a panic.

CVSS severity8.8
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Memory corruption in the Linux kernel Bluetooth stack allows physically proximate attackers to compromise the kernel during pairing. The hci_io_capa_request_evt handler checks stale remote feature bits before HCI_OP_READ_REMOTE_EXT_FEATURES completes, then drops an hci_conn reference after wrongly treating SSP as unsupported. Bluetooth radio range and a connectable or accept-listed host are required; the refcount underflow permits use-after-free, kernel compromise, or a panic.

The record

CVE
CVE-2024-27416
Published
May 17, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-911, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1769ac55dbf3114d5bf79f11bd5dca80ee263f9c <79820a7e1e057120c49be07cbe10643d0706b259
  2. Affected versionversion=1ef071526848cc3109ade63268854cd7c20ece0c <c3df637266df29edee85e94cab5fd7041e5753ba
  3. Affected versionversion=25e5d2883002e235f3378b8592aad14aeeef898c <30a5e812f78e3d1cced90e1ed750bf027599205f
  4. Affected versionversion=2c7f9fda663a1b31a61744ffc456bdb89c4efc7f
  5. Affected versionversion=40a33a129d99639921ce00d274cca44ba282f1ac <df193568d61234c81de7ed4d540c01975de60277
  6. Affected versionversion=4.14.328 <4.15
  7. Affected versionversion=4.19.297 <4.19.309
  8. Affected versionversion=5.10.199 <5.10.212
  9. Affected versionversion=5.15.137 <5.15.151
  10. Affected versionversion=5.4.259 <5.4.271
  11. Affected versionversion=6.1.60 <6.1.81
  12. Affected versionversion=6.5.9 <6.6
  13. Affected versionversion=6.6
  14. Affected versionversion=746dbb0fc6392eca23de27f8aa9d13979b564889
  15. Affected versionversion=c7f59461f5a78994613afc112cdd73688aef9076 <7e74aa53a68bf60f6019bd5d9a9a1406ec4d4865
  16. Affected versionversion=c7f59461f5a78994613afc112cdd73688aef9076 <8e2758cc25891d2b76717aaf89b40ed215de188c
  17. Affected versionversion=c7f59461f5a78994613afc112cdd73688aef9076 <fba268ac36ab19f9763ff90d276cde0ce6cd5f31
  18. Affected versionversion=ccb8618c972f941ebc6b2b9db491025b3369efcb <afec8f772296dd8e5a2a6f83bbf99db1b9ca877f

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1769ac55dbf3114d5bf79f11bd5dca80ee263f9c <79820a7e1e057120c49be07cbe10643d0706b259; version=1ef071526848cc3109ade63268854cd7c20ece0c <c3df637266df29edee85e94cab5fd7041e5753ba; version=25e5d2883002e235f3378b8592aad14aeeef898c <30a5e812f78e3d1cced90e1ed750bf027599205f; version=2c7f9fda663a1b31a61744ffc456bdb89c4efc7f; version=40a33a129d99639921ce00d274cca44ba282f1ac <df193568d61234c81de7ed4d540c01975de60277; version=4.14.328 <4.15; version=4.19.297 <4.19.309; version=5.10.199 <5.10.212; version=5.15.137 <5.15.151; version=5.4.259 <5.4.271; version=6.1.60 <6.1.81; version=6.5.9 <6.6; version=6.6; version=746dbb0fc6392eca23de27f8aa9d13979b564889; version=c7f59461f5a78994613afc112cdd73688aef9076 <7e74aa53a68bf60f6019bd5d9a9a1406ec4d4865; version=c7f59461f5a78994613afc112cdd73688aef9076 <8e2758cc25891d2b76717aaf89b40ed215de188c; version=c7f59461f5a78994613afc112cdd73688aef9076 <fba268ac36ab19f9763ff90d276cde0ce6cd5f31; version=ccb8618c972f941ebc6b2b9db491025b3369efcb <afec8f772296dd8e5a2a6f83bbf99db1b9ca877f

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
8.8Linux kernel CNACVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-911Improper Update of Reference Count
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo