Bluetooth: af_bluetooth: Fix deadlock
Priority LOW 29CWE-416Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 10 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: af_bluetooth: Fix deadlock 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>
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00489 42nd percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.15.209, 6.1.191, 6.6.23 +4Red Hat: 3 advisoriesRed Hat: 10 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.15.146 to before 5.15.209; 6.1.70 to before 6.1.191; 6.6.9 to before 6.6.23; 5.10.206 to before 5.11 | 5.15.209, 6.1.191, 6.6.23, 5.11 | Patch available | CNA |
| Linux | Linux | 6.7 and later | 5.15.209, 6.1.191, 6.6.23, 6.7.11, 6.8.2, 6.9 | Patch available | CNA |
- Linux VendorLinux Affected 5.15.146 to before 5.15.209; 6.1.70 to before 6.1.191; 6.6.9 to before 6.6.23; 5.10.206 to before 5.11 Fixed in 5.15.209, 6.1.191, 6.6.23, 5.11 Patch available CNA
- Linux VendorLinux Affected 6.7 and later Fixed in 5.15.209, 6.1.191, 6.6.23, 6.7.11, 6.8.2, 6.9 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.10.206 to before 5.11; 5.15.146 to before 5.16; 6.1.70 to before 6.1.83; 6.6.9 to before 6.6.23; 6.7 to before 6.7.11; 6.8 to before 6.8.2 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.10.206 to before 5.11; 5.15.146 to before 5.16; 6.1.70 to before 6.1.83; 6.6.9 to before 6.6.23; 6.7 to before 6.7.11; 6.8 to before 6.8.2 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.15.209, 6.1.191, 6.6.23, 5.11
- Fix · CNA Linux (Linux) Fixed in 5.15.209, 6.1.191, 6.6.23, 6.7.11, 6.8.2, 6.9
Red Hat 3 advisories
- RHSA-2024:6744 Released 2024-09-18 · Red Hat rating Moderatekernel security update
- Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-tools-libs-devel-5.14.0-284.84.1.el9_2
- Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-64k-debug-devel-5.14.0-284.84.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.84.1.el9_2, kernel-64k-devel-5.14.0-284.84.1.el9_2 +9
- 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 +29
- RHSA-2024:6745 Released 2024-09-18 · Red Hat rating Moderatekernel-rt security update
- 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-debug-5.14.0-284.84.1.rt14.369.el9_2 +9
- 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-core-5.14.0-284.84.1.rt14.369.el9_2, kernel-rt-debug-5.14.0-284.84.1.rt14.369.el9_2 +11
- RHSA-2024:6567 Released 2024-09-11 · Red Hat rating Moderatekernel security update
- Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-427.35.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.35.1.el9_4, kernel-64k-devel-5.14.0-427.35.1.el9_4 +11
- 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 +29
- Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-427.35.1.el9_4, libperf-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-core-5.14.0-427.35.1.el9_4, kernel-rt-debug-5.14.0-427.35.1.el9_4 +11
- 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-debug-5.14.0-427.35.1.el9_4 +9
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 8 | Affected | No fix yet |
| Red Hat CodeReady Linux Builder EUS (v.9.2) | Fixed | RHSA-2024:6744 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2024:6567 |
| Red Hat Enterprise Linux AppStream EUS (v.9.2) | Fixed | RHSA-2024:6744 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2024:6567 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.2) | Fixed | RHSA-2024:6744 |
| Red Hat Enterprise Linux CRB (v. 9) | Fixed | RHSA-2024:6567 |
| Red Hat Enterprise Linux NFV (v. 9) | Fixed | RHSA-2024:6567 |
| Red Hat Enterprise Linux RT (v. 9) | Fixed | RHSA-2024:6567 |
| Red Hat Enterprise Linux Real Time EUS (v.9.2) | Fixed | RHSA-2024:6745 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) | Fixed | RHSA-2024:6745 |
Not affected: 4 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux AppStream EUS (v.9.2)
Timeline
- 2026-10-02 Threatist record created from CVE-2024-26886
- 2026-10-03 Alias added: GHSA-46xg-2692-fh7x
- 2026-10-29 Affected versions changed · Red Hat
- 2026-10-30 Fix available: Linux/Linux@0309acebc4b3884bfda332558bb8a1df052f4f39, Linux/[email protected] · CNA
- 2026-10-30 1 new reference · CNA
References
Patch 5
- https://git.kernel.org/stable/c/64be3c6154886200708da0dfe259705fb992416c
- https://git.kernel.org/stable/c/817e8138ce86001b2fa5c63d6ede756e205a01f7
- https://git.kernel.org/stable/c/2c9e2df022ef8b9d7fac58a04a2ef4ed25288955
- https://git.kernel.org/stable/c/f7b94bdc1ec107c92262716b073b3e816d4784fb
- https://git.kernel.org/stable/c/cb8adca52f306563d958a863bb0cbae9c184d1ae
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2024-26886 · CVE Program
- CVE-2024-26886 · NVD
- FIRST EPSS
- GHSA-46xg-2692-fh7x · GitHub Advisory Database · CC BY 4.0
- CVE-2024-26886 · Red Hat security data · CC BY 4.0
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