PT-2024-21558 · Linux+8 · Linux Kernel+8
Luiz Augusto Von Dentz
·
Published
2024-03-06
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Updated
2026-03-14
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CVE-2024-26886
CVSS v3.1
6.5
Medium
| Vector | AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.7.6
Description
The issue is related to a deadlock in the Bluetooth module of the Linux kernel. Attempting to do a sock lock on .recvmsg may cause a deadlock. To avoid this, the kernel now uses sk receive queue.lock on bt sock ioctl instead of sock sock. This change prevents a potential Use-After-Free (UAF) condition. The problem was identified when a task was blocked for more than 30 seconds, indicating a deadlock. The call trace shows the sequence of events leading to the deadlock, involving functions such as schedule, schedule, lock sock, and l2cap sock recv cb.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use After Free
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Related Identifiers
Affected Products
Almalinux
Astra Linux
Debian
Linuxmint
Linux Kernel
Red Hat
Rocky Linux
Suse
Ubuntu