🔐 CVE Alert

CVE-2026-53071

HIGH 8.8

Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp

CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th

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().

Vendor linux
Product linux
Ecosystems
Industries
Technology
Published Jun 24, 2026
Last Updated Aug 5, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability

Affected Versions

Linux / Linux
15f02b91056253e8cdc592888f431da0731337b8 < 96dca51715d86559ed6ed8028e5445cecb80f3ae 15f02b91056253e8cdc592888f431da0731337b8 < 330b20ec97916961ee0e6c29c06bc0fa7c96e64c 15f02b91056253e8cdc592888f431da0731337b8 < 0ccd75c51f620374086f359e906917676e699a1c 15f02b91056253e8cdc592888f431da0731337b8 < 77a853aec710b2fdf41fa298ea3cbc9a4358f917 15f02b91056253e8cdc592888f431da0731337b8 < fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14 15f02b91056253e8cdc592888f431da0731337b8 < dc89961b76f12aff47124c1df4bdb32a080f4d0c 15f02b91056253e8cdc592888f431da0731337b8 < 5501d055a1ce3c747141e3955ba8cf034d193f3e 15f02b91056253e8cdc592888f431da0731337b8 < 42776497cdbc9a665b384a6dcb85f0d4bd927eab
Linux / Linux
5.7

References

NVD ↗ CVE.org ↗ EPSS Data ↗
git.kernel.org: https://git.kernel.org/stable/c/96dca51715d86559ed6ed8028e5445cecb80f3ae git.kernel.org: https://git.kernel.org/stable/c/330b20ec97916961ee0e6c29c06bc0fa7c96e64c git.kernel.org: https://git.kernel.org/stable/c/0ccd75c51f620374086f359e906917676e699a1c git.kernel.org: https://git.kernel.org/stable/c/77a853aec710b2fdf41fa298ea3cbc9a4358f917 git.kernel.org: https://git.kernel.org/stable/c/fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14 git.kernel.org: https://git.kernel.org/stable/c/dc89961b76f12aff47124c1df4bdb32a080f4d0c git.kernel.org: https://git.kernel.org/stable/c/5501d055a1ce3c747141e3955ba8cf034d193f3e git.kernel.org: https://git.kernel.org/stable/c/42776497cdbc9a665b384a6dcb85f0d4bd927eab access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-53071 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2492458 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53071.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:42919 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:43307 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:42552 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:42550