CVE-2024-26886

Medium

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>

Package Linux Kernel
Published 2024-04-17
Last modified 2026-06-01
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

6.5

out of 10
Medium
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-416

CVE-2024-26886 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.15.146, 6.6.9, 5.10.206, 6.1.70, 6.7 and later are affected. Fixed in 5.15.209, 6.6.23, 6.7.11, 6.8.2, 6.9 and their respective stable series.

Affected from
≥ 5.15.146 ≥ 6.6.9 ≥ 5.10.206 ≥ 6.1.70 ≥ 6.7
Fixed in
✓ 5.15.209 5.15.x ✓ 6.6.23 6.6.x ✓ 6.7.11 6.7.x ✓ 6.8.2 6.8.x ✓ 6.9

References

6 total
Showing 5 of 6 references View all on NVD

Frequently asked questions

  • What is CVE-2024-26886?

    CVE-2024-26886 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.5 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 5.15.146 onward and has been patched in 5.15.209, 6.6.23, 6.7.11 and others. CVE-2024-26886 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2024-26886?

    CVE-2024-26886 has a CVSS score of 6.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H .

  • Is there a patch available for CVE-2024-26886?

    Yes. CVE-2024-26886 has been patched. Fixed versions include 5.15.209, 6.6.23, 6.7.11 and others. If you are running Linux kernel 5.15.146 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2024-26886 actively exploited?

    No. CVE-2024-26886 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Back to
All CVEs
View on
NVD / NIST