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Fencer Intel
high 8.8

CVE-2026-53071 json

Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp

published 4mo ago modified 23d ago also EUVD-2026-38939

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits
0
none known

Summary

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().

Patch / fix

  • Linux Linux 7.1
  • Red Hat Red Hat Enterprise Linux 10 0:6.12.0-211.37.1.el10_2
  • Red Hat Red Hat Enterprise Linux 8 0:4.18.0-553.146.1.el8_10, 0:4.18.0-553.146.1.rt7.487.el8_10
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:4.18.0-305.206.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:4.18.0-305.206.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:4.18.0-372.213.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:4.18.0-372.213.1.el8_6
  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-687.29.1.el9_8
  • linux Debian 12 6.1.176-1
  • linux Debian 13 6.12.94-1
  • linux Debian 14 7.0.10-1

debian advisories DEBIAN-CVE-2026-53071

  • linux Ubuntu 22.04 LTS 5.15.0-186.196
  • linux Ubuntu 24.04 LTS 6.8.0-136.136
  • linux Ubuntu 26.04 LTS 7.0.0-28.28
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1112.119
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1061.64
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1009.9
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1112.122
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1064.72

ubuntu advisories UBUNTU-CVE-2026-53071

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 9 5.14.0-687.29.1.el9_8
  • rv RHEL 9 5.14.0-687.29.1.el9_8
  • perf RHEL 9 5.14.0-687.29.1.el9_8
  • rtla RHEL 9 5.14.0-687.29.1.el9_8
  • libperf RHEL 9 5.14.0-687.29.1.el9_8
  • kernel-rt RHEL 9 5.14.0-687.29.1.el9_8
  • kernel-64k RHEL 9 5.14.0-687.29.1.el9_8
  • kernel-core RHEL 9 5.14.0-687.29.1.el9_8

red hat advisories RHSA-2026:73645RHSA-2026:67723RHSA-2026:67721RHSA-2026:65711RHSA-2026:65710RHSA-2026:43307

  • kernel-default SLES 16.0, SLE High Availability Extension 16.0, Linux Micro 6.2 +1 more 6.12.0-160000.37.1
  • kernel-rt Linux Micro 6.2 6.12.0-160000.37.1
  • kernel-64kb SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.37.1
  • kernel-source SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.37.1
  • kernel-default-base SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.37.1.160000.2.19
  • kernel-syms SLES 16.0, Linux Micro Extras 6.2, SLES for SAP applications 16.0 6.12.0-160000.37.1
  • kernel-azure SLES 16.0, SLES for SAP applications 16.0 6.12.0-160000.37.1
  • kernel-obs-qa SLES 16.0, SLES for SAP applications 16.0 6.12.0-160000.37.1

suse advisories SUSE-SU-2026:23237-1SUSE-SU-2026:23068-1SUSE-SU-2026:23221-1SUSE-SU-2026:23231-1SUSE-SU-2026:23066-1SUSE-SU-2026:3156-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.37.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.37.1

opensuse advisories openSUSE-SU-2026:21555-1

  • kernel AlmaLinux 9 5.14.0-687.29.1.el9_8
  • rv AlmaLinux 9 5.14.0-687.29.1.el9_8
  • perf AlmaLinux 9 5.14.0-687.29.1.el9_8
  • rtla AlmaLinux 9 5.14.0-687.29.1.el9_8
  • libperf AlmaLinux 9 5.14.0-687.29.1.el9_8
  • kernel-rt AlmaLinux 9 5.14.0-687.29.1.el9_8
  • kernel-64k AlmaLinux 9 5.14.0-687.29.1.el9_8
  • kernel-core AlmaLinux 9 5.14.0-687.29.1.el9_8

almalinux advisories ALSA-2026:43307ALSA-2026:42550ALSA-2026:42552ALSA-2026:42919

  • kernel Rocky Linux 10 6.12.0-211.37.1.el10_2
  • kernel Rocky Linux 9 5.14.0-687.29.1.el9_8
  • kernel-rt Rocky Linux 8 4.18.0-553.146.1.rt7.487.el8_10
  • kernel Rocky Linux 8 4.18.0-553.146.1.el8_10

rocky linux advisories RLSA-2026:42919RLSA-2026:43307RLSA-2026:42550RLSA-2026:42552

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-53071 updated cvss 7.5

kernel: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp

  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: no fix available
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.29.1.el9_8, perf 5.14.0-687.29.1.el9_8, rtla 5.14.0-687.29.1.el9_8, python3-perf 5.14.0-687.29.1.el9_8, kernel-devel-matched 5.14.0-687.29.1.el9_8, kernel-64k-devel-matched 5.14.0-687.29.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:43307
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.37.1.el10_2, perf 6.12.0-211.37.1.el10_2, rtla 6.12.0-211.37.1.el10_2, python3-perf 6.12.0-211.37.1.el10_2, kernel-devel-matched 6.12.0-211.37.1.el10_2, kernel-64k-devel-matched 6.12.0-211.37.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:42919
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.191.1.el9_2, rtla 5.14.0-284.191.1.el9_2, kernel-devel-matched 5.14.0-284.191.1.el9_2, kernel-64k-devel-matched 5.14.0-284.191.1.el9_2, kernel-debug-devel-matched 5.14.0-284.191.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.191.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:67723
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.153.1.el9_4, perf 5.14.0-427.153.1.el9_4, rtla 5.14.0-427.153.1.el9_4, kernel-devel-matched 5.14.0-427.153.1.el9_4, kernel-64k-devel-matched 5.14.0-427.153.1.el9_4, kernel-debug-devel-matched 5.14.0-427.153.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:73645
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.146.1.el8_10, kernel 4.18.0-553.146.1.el8_10, bpftool 4.18.0-553.146.1.el8_10, kernel-core 4.18.0-553.146.1.el8_10, kernel-tools 4.18.0-553.146.1.el8_10, python3-perf 4.18.0-553.146.1.el8_10, +15 more
    fixed: vendor fix RHSA-2026:42552
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.29.1.el9_8, kernel-64k 5.14.0-687.29.1.el9_8, kernel-core 5.14.0-687.29.1.el9_8, kernel-tools 5.14.0-687.29.1.el9_8, kernel-modules 5.14.0-687.29.1.el9_8, kernel-64k-core 5.14.0-687.29.1.el9_8, +27 more
    fixed: vendor fix RHSA-2026:43307
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.37.1.el10_2, kernel-64k 6.12.0-211.37.1.el10_2, kernel-core 6.12.0-211.37.1.el10_2, kernel-tools 6.12.0-211.37.1.el10_2, kernel-modules 6.12.0-211.37.1.el10_2, kernel-64k-core 6.12.0-211.37.1.el10_2, +28 more
    fixed: vendor fix RHSA-2026:42919
show 20 more
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.206.1.el8_4, kernel 4.18.0-305.206.1.el8_4, bpftool 4.18.0-305.206.1.el8_4, kernel-core 4.18.0-305.206.1.el8_4, kernel-tools 4.18.0-305.206.1.el8_4, python3-perf 4.18.0-305.206.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:65710
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.213.1.el8_6, kernel 4.18.0-372.213.1.el8_6, bpftool 4.18.0-372.213.1.el8_6, kernel-core 4.18.0-372.213.1.el8_6, kernel-tools 4.18.0-372.213.1.el8_6, python3-perf 4.18.0-372.213.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:65711
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.191.1.el9_2, kernel 5.14.0-284.191.1.el9_2, kernel-64k 5.14.0-284.191.1.el9_2, kernel-core 5.14.0-284.191.1.el9_2, kernel-tools 5.14.0-284.191.1.el9_2, python3-perf 5.14.0-284.191.1.el9_2, +28 more
    fixed: vendor fix RHSA-2026:67723
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.153.1.el9_4, kernel 5.14.0-427.153.1.el9_4, kernel-64k 5.14.0-427.153.1.el9_4, kernel-core 5.14.0-427.153.1.el9_4, kernel-tools 5.14.0-427.153.1.el9_4, python3-perf 5.14.0-427.153.1.el9_4, +28 more
    fixed: vendor fix RHSA-2026:73645
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.206.1.el8_4, kernel 4.18.0-305.206.1.el8_4, bpftool 4.18.0-305.206.1.el8_4, kernel-core 4.18.0-305.206.1.el8_4, kernel-tools 4.18.0-305.206.1.el8_4, python3-perf 4.18.0-305.206.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:65710
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.213.1.el8_6, kernel 4.18.0-372.213.1.el8_6, bpftool 4.18.0-372.213.1.el8_6, kernel-core 4.18.0-372.213.1.el8_6, kernel-tools 4.18.0-372.213.1.el8_6, python3-perf 4.18.0-372.213.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:65711
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.29.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.29.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.29.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.29.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.29.1.el9_8
    fixed: vendor fix RHSA-2026:43307
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.37.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.37.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.37.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.37.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.37.1.el10_2
    fixed: vendor fix RHSA-2026:42919
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.146.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.146.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.146.1.el8_10
    fixed: vendor fix RHSA-2026:42552
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.146.1.rt7.487.el8_10, kernel-rt-kvm 4.18.0-553.146.1.rt7.487.el8_10, kernel-rt-core 4.18.0-553.146.1.rt7.487.el8_10, kernel-rt-modules 4.18.0-553.146.1.rt7.487.el8_10, kernel-rt-debug-kvm 4.18.0-553.146.1.rt7.487.el8_10, kernel-rt-debug-core 4.18.0-553.146.1.rt7.487.el8_10, +4 more
    fixed: vendor fix RHSA-2026:42550
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.29.1.el9_8, kernel-rt-64k 5.14.0-687.29.1.el9_8, kernel-rt-core 5.14.0-687.29.1.el9_8, kernel-rt-modules 5.14.0-687.29.1.el9_8, kernel-rt-64k-core 5.14.0-687.29.1.el9_8, kernel-rt-debug-core 5.14.0-687.29.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:43307
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.37.1.el10_2, kernel-rt-64k 6.12.0-211.37.1.el10_2, kernel-rt-core 6.12.0-211.37.1.el10_2, kernel-rt-modules 6.12.0-211.37.1.el10_2, kernel-rt-64k-core 6.12.0-211.37.1.el10_2, kernel-rt-debug-core 6.12.0-211.37.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:42919
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.191.1.rt14.476.el9_2, kernel-rt-core 5.14.0-284.191.1.rt14.476.el9_2, kernel-rt-modules 5.14.0-284.191.1.rt14.476.el9_2, kernel-rt-debug-core 5.14.0-284.191.1.rt14.476.el9_2, kernel-rt-modules-core 5.14.0-284.191.1.rt14.476.el9_2, kernel-rt-debug-modules 5.14.0-284.191.1.rt14.476.el9_2, +4 more
    fixed: vendor fix RHSA-2026:67721
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.153.1.el9_4, kernel-rt-core 5.14.0-427.153.1.el9_4, kernel-rt-modules 5.14.0-427.153.1.el9_4, kernel-rt-debug-core 5.14.0-427.153.1.el9_4, kernel-rt-modules-core 5.14.0-427.153.1.el9_4, kernel-rt-debug-modules 5.14.0-427.153.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:73645
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.29.1.el9_8, kernel-rt-core 5.14.0-687.29.1.el9_8, kernel-rt-modules 5.14.0-687.29.1.el9_8, kernel-rt-debug-core 5.14.0-687.29.1.el9_8, kernel-rt-modules-core 5.14.0-687.29.1.el9_8, kernel-rt-debug-modules 5.14.0-687.29.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:43307
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.37.1.el10_2, kernel-rt-core 6.12.0-211.37.1.el10_2, kernel-rt-modules 6.12.0-211.37.1.el10_2, kernel-rt-debug-core 6.12.0-211.37.1.el10_2, kernel-rt-modules-core 6.12.0-211.37.1.el10_2, kernel-rt-debug-modules 6.12.0-211.37.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:42919
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.191.1.rt14.476.el9_2, kernel-rt-kvm 5.14.0-284.191.1.rt14.476.el9_2, kernel-rt-core 5.14.0-284.191.1.rt14.476.el9_2, kernel-rt-modules 5.14.0-284.191.1.rt14.476.el9_2, kernel-rt-debug-kvm 5.14.0-284.191.1.rt14.476.el9_2, kernel-rt-debug-core 5.14.0-284.191.1.rt14.476.el9_2, +6 more
    fixed: vendor fix RHSA-2026:67721
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.153.1.el9_4, kernel-rt-kvm 5.14.0-427.153.1.el9_4, kernel-rt-core 5.14.0-427.153.1.el9_4, kernel-rt-modules 5.14.0-427.153.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.153.1.el9_4, kernel-rt-debug-core 5.14.0-427.153.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:73645
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.146.1.rt7.487.el8_10, kernel-rt-core 4.18.0-553.146.1.rt7.487.el8_10, kernel-rt-modules 4.18.0-553.146.1.rt7.487.el8_10, kernel-rt-debug-core 4.18.0-553.146.1.rt7.487.el8_10, kernel-rt-debug-modules 4.18.0-553.146.1.rt7.487.el8_10, kernel-rt-modules-extra 4.18.0-553.146.1.rt7.487.el8_10, +2 more
    fixed: vendor fix RHSA-2026:42550
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
26d ago

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 7.5 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.5 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.