medium 6.5

CVE-2024-26886 json

Bluetooth: af_bluetooth: Fix deadlock

published 2024-04-17 2y ago modified 2026-10-30 12d ago also EUVD-2024-24148

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits: 0; none known

In the Linux kernel, the following vulnerability has been resolved:

Attemting to do sock_lock on .recvmsg may cause a deadlock as shown bellow, so instead of using sock_sock this uses sk_receive_queue.lock on bt_sock_ioctl to avoid the UAF:

INFO: task kworker/u9:1:121 blocked for more than 30 seconds. Not tainted 6.7.6-lemon #183 Workqueue: hci0 hci_rx_work Call Trace: <TASK> __schedule+0x37d/0xa00 schedule+0x32/0xe0 __lock_sock+0x68/0xa0 ? __pfx_autoremove_wake_function+0x10/0x10 lock_sock_nested+0x43/0x50 l2cap_sock_recv_cb+0x21/0xa0 l2cap_recv_frame+0x55b/0x30a0 ? psi_task_switch+0xeb/0x270 ? finish_task_switch.isra.0+0x93/0x2a0 hci_rx_work+0x33a/0x3f0 process_one_work+0x13a/0x2f0 worker_thread+0x2f0/0x410 ? __pfx_worker_thread+0x10/0x10 kthread+0xe0/0x110 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x2c/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30 </TASK>

Patch / fix

fixed in 1 distros 6 links 7

Linux Linux 5.11, 5.15.209, 6.1.191, 6.6.23, 6.7.11, 6.8.2, 6.9

debian ubuntu red hat suse almalinux rocky linux

linux Debian 12 6.1.85-1
linux Debian 14, Debian 13 6.7.12-1

debian advisories DEBIAN-CVE-2024-26886

linux Ubuntu 20.04 LTS 5.4.0-192.212
linux Ubuntu 22.04 LTS 5.15.0-117.127
linux Ubuntu 24.04 LTS 6.8.0-35.35
linux-aws Ubuntu 20.04 LTS 5.4.0-1130.140
linux-aws Ubuntu 22.04 LTS 5.15.0-1066.72
linux-aws Ubuntu 24.04 LTS 6.8.0-1009.9
linux-gcp Ubuntu 20.04 LTS 5.4.0-1134.143
linux-gcp Ubuntu 22.04 LTS 5.15.0-1065.73

ubuntu advisories UBUNTU-CVE-2024-26886

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 5.14.0-427.35.1.el9_4
rv RHEL 9 5.14.0-427.35.1.el9_4
perf RHEL 9 5.14.0-427.35.1.el9_4
rtla RHEL 9 5.14.0-427.35.1.el9_4
bpftool RHEL 9 7.3.0-427.35.1.el9_4
libperf RHEL 9 5.14.0-427.35.1.el9_4
kernel-rt RHEL 9 5.14.0-427.35.1.el9_4
kernel-64k RHEL 9 5.14.0-427.35.1.el9_4

red hat advisories RHSA-2024:6567 RHSA-2024:6745 RHSA-2024:6744

kernel-64kb SLE High Performance Computing 15 SP5-ESPOS, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS 5.14.21-150500.55.91.1
kernel-syms SLE High Performance Computing 15 SP5-ESPOS, SLES for SAP 15 SP5, SLES 15 SP5-LTSS +1 more 5.14.21-150500.55.91.1
kernel-source SLE High Performance Computing 15 SP5-ESPOS, SLES for SAP 15 SP5, SLES 15 SP5-LTSS +1 more 5.14.21-150500.55.91.1
kernel-default SLE Micro 5.5, SLE High Performance Computing 15 SP5-ESPOS, SLES for SAP 15 SP5 +3 more 5.14.21-150500.55.91.1
kernel-obs-build SLE High Performance Computing 15 SP5-ESPOS, SLES for SAP 15 SP5, SLES 15 SP5-LTSS +1 more 5.14.21-150500.55.91.1
kernel-default-base SLE Micro 5.5, SLE High Performance Computing 15 SP5-ESPOS, SLES for SAP 15 SP5 +2 more 5.14.21-150500.55.91.1.150500.6.41.1
kernel-rt SLE Micro 5.5 5.14.21-150500.13.82.1
kernel-source-rt SLE Micro 5.5 5.14.21-150500.13.82.1

suse advisories SUSE-SU-2025:0201-1 SUSE-SU-2025:0201-2 SUSE-SU-2025:0229-1 SUSE-SU-2025:0035-1 SUSE-SU-2024:4367-1

kernel AlmaLinux 9 5.14.0-427.35.1.el9_4
rv AlmaLinux 9 5.14.0-427.35.1.el9_4
perf AlmaLinux 9 5.14.0-427.35.1.el9_4
rtla AlmaLinux 9 5.14.0-427.35.1.el9_4
bpftool AlmaLinux 9 7.3.0-427.35.1.el9_4
libperf AlmaLinux 9 5.14.0-427.35.1.el9_4
kernel-rt AlmaLinux 9 5.14.0-427.35.1.el9_4
kernel-64k AlmaLinux 9 5.14.0-427.35.1.el9_4

almalinux advisories ALSA-2024:6567

kernel Rocky Linux 9 5.14.0-427.35.1.el9_4.cloud.1.0
kernel Rocky Linux 9 5.14.0-427.35.1.el9_4

rocky linux advisories RXSA-2024:6567 RLSA-2024:6567

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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-2024-26886 updated 2026-11-05 cvss 5.3

kernel: Bluetooth: af_bluetooth: Fix deadlock

Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
affected: no fix available
Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-debuginfo-common-s390x 5.14.0-284.84.1.el9_2, kernel-debuginfo-common-x86_64 5.14.0-284.84.1.el9_2, kernel-debuginfo-common-aarch64 5.14.0-284.84.1.el9_2, kernel-debuginfo-common-ppc64le 5.14.0-284.84.1.el9_2
fixed: vendor fix RHSA-2024:6744
Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-427.35.1.el9_4, perf 5.14.0-427.35.1.el9_4, rtla 5.14.0-427.35.1.el9_4, kernel-devel-matched 5.14.0-427.35.1.el9_4, kernel-64k-devel-matched 5.14.0-427.35.1.el9_4, kernel-debug-devel-matched 5.14.0-427.35.1.el9_4, +6 more
fixed: vendor fix RHSA-2024:6567
Red Hat Enterprise Linux AppStream EUS (v.9.2) perf 5.14.0-284.84.1.el9_2, rtla 5.14.0-284.84.1.el9_2, kernel-devel-matched 5.14.0-284.84.1.el9_2, kernel-64k-devel-matched 5.14.0-284.84.1.el9_2, kernel-debug-devel-matched 5.14.0-284.84.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.84.1.el9_2, +5 more
fixed: vendor fix RHSA-2024:6744
Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.3.0-427.35.1.el9_4, kernel 5.14.0-427.35.1.el9_4, kernel-64k 5.14.0-427.35.1.el9_4, kernel-core 5.14.0-427.35.1.el9_4, kernel-tools 5.14.0-427.35.1.el9_4, python3-perf 5.14.0-427.35.1.el9_4, +28 more
fixed: vendor fix RHSA-2024:6567
Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool 7.0.0-284.84.1.el9_2, kernel 5.14.0-284.84.1.el9_2, kernel-64k 5.14.0-284.84.1.el9_2, kernel-core 5.14.0-284.84.1.el9_2, kernel-tools 5.14.0-284.84.1.el9_2, python3-perf 5.14.0-284.84.1.el9_2, +28 more
fixed: vendor fix RHSA-2024:6744
Red Hat Enterprise Linux CRB (v. 9) libperf 5.14.0-427.35.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.35.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.35.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.35.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.35.1.el9_4 Red Hat Enterprise Linux NFV (v. 9) kernel-rt 5.14.0-427.35.1.el9_4, kernel-rt-kvm 5.14.0-427.35.1.el9_4, kernel-rt-core 5.14.0-427.35.1.el9_4, kernel-rt-modules 5.14.0-427.35.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.35.1.el9_4, kernel-rt-debug-core 5.14.0-427.35.1.el9_4, +6 more
fixed: vendor fix RHSA-2024:6567
Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt 5.14.0-284.84.1.rt14.369.el9_2, kernel-rt-core 5.14.0-284.84.1.rt14.369.el9_2, kernel-rt-modules 5.14.0-284.84.1.rt14.369.el9_2, kernel-rt-debug-core 5.14.0-284.84.1.rt14.369.el9_2, kernel-rt-modules-core 5.14.0-284.84.1.rt14.369.el9_2, kernel-rt-debug-modules 5.14.0-284.84.1.rt14.369.el9_2, +4 more Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt 5.14.0-284.84.1.rt14.369.el9_2, kernel-rt-kvm 5.14.0-284.84.1.rt14.369.el9_2, kernel-rt-core 5.14.0-284.84.1.rt14.369.el9_2, kernel-rt-modules 5.14.0-284.84.1.rt14.369.el9_2, kernel-rt-debug-kvm 5.14.0-284.84.1.rt14.369.el9_2, kernel-rt-debug-core 5.14.0-284.84.1.rt14.369.el9_2, +6 more
fixed: vendor fix RHSA-2024:6745

show 2 more

Red Hat Enterprise Linux RT (v. 9) kernel-rt 5.14.0-427.35.1.el9_4, kernel-rt-core 5.14.0-427.35.1.el9_4, kernel-rt-modules 5.14.0-427.35.1.el9_4, kernel-rt-debug-core 5.14.0-427.35.1.el9_4, kernel-rt-modules-core 5.14.0-427.35.1.el9_4, kernel-rt-debug-modules 5.14.0-427.35.1.el9_4, +4 more
fixed: vendor fix RHSA-2024:6567
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 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 Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-doc 5.14.0-284.84.1.el9_2
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: partial
Assessed: 2y ago (2024-06-17)

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.5	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA	3.1	6.5	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Linux Linux

Classification

Weakness

CWE-416 Use After Free

Technology feeds

Linux kernel rss critical rss

References

Sources

CVE List CVE-2024-26886
NVD CVE-2024-26886

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