CVE-2026-53071

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().

• CWE-667
• CWE-416

• https://git.kernel.org/stable/c/0ccd75c51f620374086f359e906917676e699a1cPatch
• https://git.kernel.org/stable/c/330b20ec97916961ee0e6c29c06bc0fa7c96e64cPatch
• https://git.kernel.org/stable/c/42776497cdbc9a665b384a6dcb85f0d4bd927eabPatch
• https://git.kernel.org/stable/c/5501d055a1ce3c747141e3955ba8cf034d193f3ePatch
• https://git.kernel.org/stable/c/77a853aec710b2fdf41fa298ea3cbc9a4358f917Patch
• https://git.kernel.org/stable/c/96dca51715d86559ed6ed8028e5445cecb80f3aePatch
• https://git.kernel.org/stable/c/dc89961b76f12aff47124c1df4bdb32a080f4d0cPatch
• https://git.kernel.org/stable/c/fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14Patch
• https://access.redhat.com/errata/RHSA-2026:42550Third Party Advisory
• https://access.redhat.com/errata/RHSA-2026:42552Third Party Advisory
• https://access.redhat.com/errata/RHSA-2026:42919
• https://access.redhat.com/errata/RHSA-2026:43307
• https://access.redhat.com/security/cve/CVE-2026-53071Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2492458Third Party Advisory
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53071.jsonThird Party Advisory

Published

Jun 24, 2026

Last Modified

Jul 23, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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