CVE-2023-54120 - Vulnerability Details

- Bluetooth: Fix race condition in hidp_session_thread

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

Published: 2025-12-24

Score: 7.0 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 152f47bd6b995e0e98c85672f6d19894bc287ef2
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 5f3d214d19899183d4e0cce7552998262112e4ab
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 8a99e6200c38b78a45dcd12a6bdc43fdf4dc36be
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< f7ec5ca433ceead8d9d78fd2febff094f289441d
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 0efb276d5848a3accc37c6f41b85e442c4768169
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< f6719fd8f409fa1da8dc956e93822d25e1e8b360
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 248af9feca062a4ca9c3f2ccf67056c8a5eb817f
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< c95930abd687fcd1aa040dc4fe90dff947916460

Linux

affected

Version	Status	Constraints
`2.6.12`	affected	—
`0`	unaffected	< 2.6.12
`4.14.313`	unaffected	≤ 4.14.*
`4.19.281`	unaffected	≤ 4.19.*
`5.4.241`	unaffected	≤ 5.4.*
`5.10.178`	unaffected	≤ 5.10.*
`5.15.108`	unaffected	≤ 5.15.*
`6.1.25`	unaffected	≤ 6.1.*
`6.2.12`	unaffected	≤ 6.2.*
`6.3`	unaffected	≤ *

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00047.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/0efb276d5848a3accc37c6f41b85e442c4768169
https://git.kernel.org/stable/c/152f47bd6b995e0e98c85672f6d19894bc287ef2
https://git.kernel.org/stable/c/248af9feca062a4ca9c3f2ccf67056c8a5eb817f
https://git.kernel.org/stable/c/5f3d214d19899183d4e0cce7552998262112e4ab
https://git.kernel.org/stable/c/8a99e6200c38b78a45dcd12a6bdc43fdf4dc36be
https://git.kernel.org/stable/c/c95930abd687fcd1aa040dc4fe90dff947916460
https://git.kernel.org/stable/c/f6719fd8f409fa1da8dc956e93822d25e1e8b360
https://git.kernel.org/stable/c/f7ec5ca433ceead8d9d78fd2febff094f289441d
https://lore.kernel.org/linux-cve-announce/2025122416-CVE-2023-54120-d966@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2023-54120
https://www.cve.org/CVERecord?id=CVE-2023-54120

History

Thu, 25 Dec 2025 00:15:00 +0000

Type	Values Removed	Values Added
References		https://lore.kernel.org/linux-cve-announce/2025122416-CVE-2023-54120-d966@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2023-54120 https://www.cve.org/CVERecord?id=CVE-2023-54120
Metrics	threat_severity `None`	cvssV3_1 `{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}` threat_severity `Important`

Wed, 24 Dec 2025 13:15:00 +0000

Type	Values Removed	Values Added
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
Title		Bluetooth: Fix race condition in hidp_session_thread
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/0efb276d5848a3accc37c6f41b85e442c4768169 https://git.kernel.org/stable/c/152f47bd6b995e0e98c85672f6d19894bc287ef2 https://git.kernel.org/stable/c/248af9feca062a4ca9c3f2ccf67056c8a5eb817f https://git.kernel.org/stable/c/5f3d214d19899183d4e0cce7552998262112e4ab https://git.kernel.org/stable/c/8a99e6200c38b78a45dcd12a6bdc43fdf4dc36be https://git.kernel.org/stable/c/c95930abd687fcd1aa040dc4fe90dff947916460 https://git.kernel.org/stable/c/f6719fd8f409fa1da8dc956e93822d25e1e8b360 https://git.kernel.org/stable/c/f7ec5ca433ceead8d9d78fd2febff094f289441d

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-12-24T13:06:40.420Z

Updated: 2026-05-11T19:55:52.000Z

Reserved: 2025-12-24T13:02:52.520Z

Link: CVE-2023-54120

Vulnrichment

No data.

NVD

Status : Deferred

Published: 2025-12-24T13:16:13.940

Modified: 2026-04-15T00:35:42.020

Link: CVE-2023-54120

Redhat

Severity : Important

Publid Date: 2025-12-24T00:00:00Z

Links: CVE-2023-54120 - Bugzilla

OpenCVE Enrichment

No data.

Weaknesses

No weakness.

Tracking

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Subscriptions

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