Linux kernel Bluetooth L2CAP: Missing lock in l2cap_ecred_reconf_rsp()
CVE-2026-53071 Published on June 24, 2026
Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp
l2cap_ecred_reconf_rsp() calls l2cap_chan_del() without holding
l2cap_chan_lock(). Every other l2cap_chan_del() caller in the file
acquires the lock first. A remote BLE device can send a crafted
L2CAP ECRED reconfiguration response to corrupt the channel list
while another thread is iterating it.
Add l2cap_chan_hold() and l2cap_chan_lock() before l2cap_chan_del(),
and l2cap_chan_unlock() and l2cap_chan_put() after, matching the
pattern used in l2cap_ecred_conn_rsp() and l2cap_conn_del().
Vulnerability Analysis
Weakness Type
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2026-53071 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2026-53071
You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-53071 are published in these products:
Affected Versions
Linux:- Version 15f02b91056253e8cdc592888f431da0731337b8 and below 96dca51715d86559ed6ed8028e5445cecb80f3ae is affected.
- Version 15f02b91056253e8cdc592888f431da0731337b8 and below 330b20ec97916961ee0e6c29c06bc0fa7c96e64c is affected.
- Version 15f02b91056253e8cdc592888f431da0731337b8 and below 0ccd75c51f620374086f359e906917676e699a1c is affected.
- Version 15f02b91056253e8cdc592888f431da0731337b8 and below 77a853aec710b2fdf41fa298ea3cbc9a4358f917 is affected.
- Version 15f02b91056253e8cdc592888f431da0731337b8 and below fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14 is affected.
- Version 15f02b91056253e8cdc592888f431da0731337b8 and below dc89961b76f12aff47124c1df4bdb32a080f4d0c is affected.
- Version 15f02b91056253e8cdc592888f431da0731337b8 and below 5501d055a1ce3c747141e3955ba8cf034d193f3e is affected.
- Version 15f02b91056253e8cdc592888f431da0731337b8 and below 42776497cdbc9a665b384a6dcb85f0d4bd927eab is affected.
- Version 5.7 is affected.
- Before 5.7 is unaffected.
- Version 5.10.258, <= 5.10.* is unaffected.
- Version 5.15.209, <= 5.15.* is unaffected.
- Version 6.1.175, <= 6.1.* is unaffected.
- Version 6.6.141, <= 6.6.* is unaffected.
- Version 6.12.91, <= 6.12.* is unaffected.
- Version 6.18.33, <= 6.18.* is unaffected.
- Version 7.0.10, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.
- Version 0:6.12.0-211.37.1.el10_2 and below * is unaffected.
- Version 0:4.18.0-553.146.1.rt7.487.el8_10 and below * is unaffected.
- Version 0:4.18.0-553.146.1.el8_10 and below * is unaffected.
- Version 0:5.14.0-687.29.1.el9_8 and below * is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.