CVE-2026-53071
Description
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().
Metadata
Severity & Metrics
No CVSS data available.
Affected products (2)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| Linux | Linux | — | 15f02b91056253e8cdc592888f431da0731337b8 < 96dca51715d86559ed6ed8028e5445cecb80f3ae, 15f02b91056253e8cdc592888f431da0731337b8 < 330b20ec97916961ee0e6c29c06bc0fa7c96e64c, 15f02b91056253e8cdc592888f431da0731337b8 < 0ccd75c51f620374086f359e906917676e699a1c, 15f02b91056253e8cdc592888f431da0731337b8 < 77a853aec710b2fdf41fa298ea3cbc9a4358f917 … |
| Linux | Linux | — | 5.7, 0 < 5.7, 5.10.258 ≤ 5.10.*, 5.15.209 ≤ 5.15.* … |
References (8)
- https://git.kernel.org/stable/c/96dca51715d86559ed6ed8028e5445cecb80f3ae
- https://git.kernel.org/stable/c/330b20ec97916961ee0e6c29c06bc0fa7c96e64c
- https://git.kernel.org/stable/c/0ccd75c51f620374086f359e906917676e699a1c
- https://git.kernel.org/stable/c/77a853aec710b2fdf41fa298ea3cbc9a4358f917
- https://git.kernel.org/stable/c/fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14
- https://git.kernel.org/stable/c/dc89961b76f12aff47124c1df4bdb32a080f4d0c
- https://git.kernel.org/stable/c/5501d055a1ce3c747141e3955ba8cf034d193f3e
- https://git.kernel.org/stable/c/42776497cdbc9a665b384a6dcb85f0d4bd927eab