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CVE-2024-26886

6.5 · 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…

Published Apr 17, 2024CWE-416EPSS 0.49%

Overview

CVE-2024-26886 is a medium-severity vulnerability. It was published on April 17, 2024 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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>

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/2c9e2df022ef8b9d7fac58a04a2ef4ed25288955Refgit.kernel.org/stable/c/60673f442984fe689d4127a5dd4be414247b3d67Refgit.kernel.org/stable/c/64be3c6154886200708da0dfe259705fb992416cRefgit.kernel.org/stable/c/817e8138ce86001b2fa5c63d6ede756e205a01f7Refgit.kernel.org/stable/c/f7b94bdc1ec107c92262716b073b3e816d4784fbRefgit.kernel.org/stable/c/2c9e2df022ef8b9d7fac58a04a2ef4ed25288955Refgit.kernel.org/stable/c/64be3c6154886200708da0dfe259705fb992416cRefgit.kernel.org/stable/c/817e8138ce86001b2fa5c63d6ede756e205a01f7Refgit.kernel.org/stable/c/cb8adca52f306563d958a863bb0cbae9c184d1aeRefgit.kernel.org/stable/c/f7b94bdc1ec107c92262716b073b3e816d4784fb

How CyberStrike helps

Frequently asked questions

What is CVE-2024-26886?

CVE-2024-26886 is a medium-severity vulnerability. It was published on April 17, 2024 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2024-26886?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-26886?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-26886?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-26886 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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