CVE-2023-54120

Bluetooth: Fix race condition in hidp_session_thread

State: Published
Severity: 8.8 High
Published: Dec 24, 2025
Updated: Oct 15, 2026
Reserved: Dec 24, 2025

Description

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

Bluetooth: Fix race condition in hidp_session_thread

There is a potential race condition in hidp_session_thread that may lead to use-after-free. For instance, the timer is active while hidp_del_timer is called in hidp_session_thread(). After hidp_session_put, then 'session' will be freed, causing kernel panic when hidp_idle_timeout is running.

The solution is to use del_timer_sync instead of del_timer.

Here is the call trace:

? hidp_session_probe+0x780/0x780 call_timer_fn+0x2d/0x1e0 __run_timers.part.0+0x569/0x940 hidp_session_probe+0x780/0x780 call_timer_fn+0x1e0/0x1e0 ktime_get+0x5c/0xf0 lapic_next_deadline+0x2c/0x40 clockevents_program_event+0x205/0x320 run_timer_softirq+0xa9/0x1b0 __do_softirq+0x1b9/0x641 __irq_exit_rcu+0xdc/0x190 irq_exit_rcu+0xe/0x20 sysvec_apic_timer_interrupt+0xa1/0xc0

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 152f47bd6b995e0e98c85672f6d19894bc287ef2Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 5f3d214d19899183d4e0cce7552998262112e4abAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 8a99e6200c38b78a45dcd12a6bdc43fdf4dc36beAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before f7ec5ca433ceead8d9d78fd2febff094f289441dAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 0efb276d5848a3accc37c6f41b85e442c4768169Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before f6719fd8f409fa1da8dc956e93822d25e1e8b360Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 248af9feca062a4ca9c3f2ccf67056c8a5eb817fAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before c95930abd687fcd1aa040dc4fe90dff947916460Affected
LinuxLinux	2.6.12Affected before 2.6.12Not affected 4.14.313 through 4.14.Not affected 4.19.281 through 4.19.Not affected 5.4.241 through 5.4.Not affected 5.10.178 through 5.10.Not affected 5.15.108 through 5.15.Not affected 6.1.25 through 6.1.Not affected 6.2.12 through 6.2.*Not affected 6.3 and laterNot affected

Product

Versions

LinuxLinux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 152f47bd6b995e0e98c85672f6d19894bc287ef2Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 5f3d214d19899183d4e0cce7552998262112e4abAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 8a99e6200c38b78a45dcd12a6bdc43fdf4dc36beAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before f7ec5ca433ceead8d9d78fd2febff094f289441dAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 0efb276d5848a3accc37c6f41b85e442c4768169Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before f6719fd8f409fa1da8dc956e93822d25e1e8b360Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 248af9feca062a4ca9c3f2ccf67056c8a5eb817fAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before c95930abd687fcd1aa040dc4fe90dff947916460Affected

LinuxLinux

2.6.12Affected
before 2.6.12Not affected
4.14.313 through 4.14.*Not affected
4.19.281 through 4.19.*Not affected
5.4.241 through 5.4.*Not affected
5.10.178 through 5.10.*Not affected
5.15.108 through 5.15.*Not affected
6.1.25 through 6.1.*Not affected
6.2.12 through 6.2.*Not affected
6.3 and laterNot affected

References

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