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

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 0.00035.

Key SSVC decision points have not yet been added.

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 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 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.

No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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

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

Type Values Removed Values Added
References
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

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-01-05T10:33:52.998Z

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

Link: CVE-2023-54120

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

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

Modified: 2025-12-29T15:58:34.503

Link: CVE-2023-54120

cve-icon Redhat

Severity : Important

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

Links: CVE-2023-54120 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.