CVE-2026-53071

Adjacent kernel crash via unlocked channel deletion

Published Jun 24, 2026 · Updated Jun 24, 2026

Improper locking in Linux Kernel 5.7 and later allows physically proximate attackers to crash the kernel via a crafted BLE response. The l2cap_ecred_reconf_rsp() handler calls l2cap_chan_del() without l2cap_chan_lock(), allowing deletion to corrupt the channel list during concurrent iteration. A nearby BLE peer must reach an established ECRED channel and win the race; reported consequences are a kernel crash or corrupted connection state.

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

Improper locking in Linux Kernel 5.7 and later allows physically proximate attackers to crash the kernel via a crafted BLE response. The l2cap_ecred_reconf_rsp() handler calls l2cap_chan_del() without l2cap_chan_lock(), allowing deletion to corrupt the channel list during concurrent iteration. A nearby BLE peer must reach an established ECRED channel and win the race; reported consequences are a kernel crash or corrupted connection state.

The record

CVE
CVE-2026-53071
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, CWE-667, T1499
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=15f02b91056253e8cdc592888f431da0731337b8 <0ccd75c51f620374086f359e906917676e699a1c
  2. Affected versionversion=15f02b91056253e8cdc592888f431da0731337b8 <330b20ec97916961ee0e6c29c06bc0fa7c96e64c
  3. Affected versionversion=15f02b91056253e8cdc592888f431da0731337b8 <42776497cdbc9a665b384a6dcb85f0d4bd927eab
  4. Affected versionversion=15f02b91056253e8cdc592888f431da0731337b8 <5501d055a1ce3c747141e3955ba8cf034d193f3e
  5. Affected versionversion=15f02b91056253e8cdc592888f431da0731337b8 <77a853aec710b2fdf41fa298ea3cbc9a4358f917
  6. Affected versionversion=15f02b91056253e8cdc592888f431da0731337b8 <96dca51715d86559ed6ed8028e5445cecb80f3ae
  7. Affected versionversion=15f02b91056253e8cdc592888f431da0731337b8 <dc89961b76f12aff47124c1df4bdb32a080f4d0c
  8. Affected versionversion=15f02b91056253e8cdc592888f431da0731337b8 <fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14
  9. Affected versionversion=5.7

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=15f02b91056253e8cdc592888f431da0731337b8 <0ccd75c51f620374086f359e906917676e699a1c; version=15f02b91056253e8cdc592888f431da0731337b8 <330b20ec97916961ee0e6c29c06bc0fa7c96e64c; version=15f02b91056253e8cdc592888f431da0731337b8 <42776497cdbc9a665b384a6dcb85f0d4bd927eab; version=15f02b91056253e8cdc592888f431da0731337b8 <5501d055a1ce3c747141e3955ba8cf034d193f3e; version=15f02b91056253e8cdc592888f431da0731337b8 <77a853aec710b2fdf41fa298ea3cbc9a4358f917; version=15f02b91056253e8cdc592888f431da0731337b8 <96dca51715d86559ed6ed8028e5445cecb80f3ae; version=15f02b91056253e8cdc592888f431da0731337b8 <dc89961b76f12aff47124c1df4bdb32a080f4d0c; version=15f02b91056253e8cdc592888f431da0731337b8 <fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14; version=5.7

Published CVSS scores

7.5Red HatCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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

CWE-416Use After Free
CWE-667Improper Locking
T1499Endpoint Denial of Service

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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