CVE-2026-52918

Kernel memory corruption via Bluetooth accept queue race

Published Jun 24, 2026 · Updated Jun 24, 2026

Race condition in the Bluetooth socket layer in Linux Kernel allows physically proximate attackers to corrupt kernel memory. bt_sock_poll() traverses accept_q without synchronization while child teardown can unlink and release the final reference to the same socket, causing use-after-free access. Reachability requires a listening Bluetooth service and nearby connection churn; exploitation can disclose or alter kernel memory or crash the host.

CVSS severity8.8
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Bluetooth socket layer in Linux Kernel allows physically proximate attackers to corrupt kernel memory. bt_sock_poll() traverses accept_q without synchronization while child teardown can unlink and release the final reference to the same socket, causing use-after-free access. Reachability requires a listening Bluetooth service and nearby connection churn; exploitation can disclose or alter kernel memory or crash the host.

The record

CVE
CVE-2026-52918
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <41c8c1c7923e86e0eb59cfb4279349112756a336
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4ec17782fd186f901a7329605d11048b085b945a
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <85f8674cae82053f1e6bab295f6a8422cca14db5
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8b4c412e001b0c670eb937beab491af974da55b3
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a218bf69eb51fefe59a3976fa8925261141f681c
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <be43e6b4043113c3b3cf887c3c8350f67140274c
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d9ce4de05df2385c19e2c7d12f529144e1a44af1
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e83f5e24da741fa9405aeeff00b08c5ee7c37b88
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <41c8c1c7923e86e0eb59cfb4279349112756a336; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4ec17782fd186f901a7329605d11048b085b945a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <85f8674cae82053f1e6bab295f6a8422cca14db5; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8b4c412e001b0c670eb937beab491af974da55b3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a218bf69eb51fefe59a3976fa8925261141f681c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <be43e6b4043113c3b3cf887c3c8350f67140274c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d9ce4de05df2385c19e2c7d12f529144e1a44af1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e83f5e24da741fa9405aeeff00b08c5ee7c37b88; version=2.6.12

Published CVSS scores

8.8kernel.orgCVSS: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.

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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

No sourced classifications are available.

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

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Your stack

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