8.8

CVE-2026-53071

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().
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.7 < 5.10.258
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.209
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.175
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.141
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.91
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.33
Linux ≫ Linux Kernel Version >= 6.19 < 7.0.10
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.26% 0.177
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 8.8 2.8 5.9
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0b0ca135-0b70-47e7-9f44-1890c2a1c46c 7.5 1.6 5.9
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

CWE-667 Improper Locking

The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

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