CVE-2022-50725 - Vulnerability Details

- media: vidtv: Fix use-after-free in vidtv_bridge_dvb_init()

Description

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

media: vidtv: Fix use-after-free in vidtv_bridge_dvb_init()

KASAN reports a use-after-free:
BUG: KASAN: use-after-free in dvb_dmxdev_release+0x4d5/0x5d0 [dvb_core]
Call Trace:
...
dvb_dmxdev_release+0x4d5/0x5d0 [dvb_core]
vidtv_bridge_probe+0x7bf/0xa40 [dvb_vidtv_bridge]
platform_probe+0xb6/0x170
...
Allocated by task 1238:
...
dvb_register_device+0x1a7/0xa70 [dvb_core]
dvb_dmxdev_init+0x2af/0x4a0 [dvb_core]
vidtv_bridge_probe+0x766/0xa40 [dvb_vidtv_bridge]
...
Freed by task 1238:
dvb_register_device+0x6d2/0xa70 [dvb_core]
dvb_dmxdev_init+0x2af/0x4a0 [dvb_core]
vidtv_bridge_probe+0x766/0xa40 [dvb_vidtv_bridge]
...

It is because the error handling in vidtv_bridge_dvb_init() is wrong.

First, vidtv_bridge_dmx(dev)_init() will clean themselves when fail, but
goto fail_dmx(_dev): calls release functions again, which causes
use-after-free.

Also, in fail_fe, fail_tuner_probe and fail_demod_probe, j = i will cause
out-of-bound when i finished its loop (i == NUM_FE). And the loop
releasing is wrong, although now NUM_FE is 1 so it won't cause problem.

Fix this by correctly releasing everything.

Published: 2025-12-24

Score: n/a

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

No analysis available yet.

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
`f90cf6079bf67988f8b1ad1ade70fc89d0080905`	affected	< 0369af6fe33d4053899b121b32e91f870b2cf0ae
`f90cf6079bf67988f8b1ad1ade70fc89d0080905`	affected	< c290aa527fd832d278c6388a3ba53a9890fbd74a
`f90cf6079bf67988f8b1ad1ade70fc89d0080905`	affected	< 06398ce69571a43a8a0dd0f1bfe35d221f726a6a
`f90cf6079bf67988f8b1ad1ade70fc89d0080905`	affected	< 8a204a0b4a0d105229735222c515759ea2b126c1
`f90cf6079bf67988f8b1ad1ade70fc89d0080905`	affected	< ba8d9405935097e296bcf7a942c3a01df0edb865

Linux

affected

Version	Status	Constraints
`5.10`	affected	—
`0`	unaffected	< 5.10
`5.10.163`	unaffected	≤ 5.10.*
`5.15.86`	unaffected	≤ 5.15.*
`6.0.16`	unaffected	≤ 6.0.*
`6.1.2`	unaffected	≤ 6.1.*
`6.2`	unaffected	≤ *

No data.

No data available yet.

Remediation

No remediation available yet.

Tracking

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Advisories

No advisories yet.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00027.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/0369af6fe33d4053899b121b32e91f870b2cf0ae
https://git.kernel.org/stable/c/06398ce69571a43a8a0dd0f1bfe35d221f726a6a
https://git.kernel.org/stable/c/8a204a0b4a0d105229735222c515759ea2b126c1
https://git.kernel.org/stable/c/ba8d9405935097e296bcf7a942c3a01df0edb865
https://git.kernel.org/stable/c/c290aa527fd832d278c6388a3ba53a9890fbd74a
https://lore.kernel.org/linux-cve-announce/2025122418-CVE-2022-50725-967f@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2022-50725
https://www.cve.org/CVERecord?id=CVE-2022-50725

History

Thu, 25 Dec 2025 12:15:00 +0000

Type	Values Removed	Values Added
References		https://lore.kernel.org/linux-cve-announce/2025122418-CVE-2022-50725-967f@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2022-50725 https://www.cve.org/CVERecord?id=CVE-2022-50725
Metrics	threat_severity `None`	threat_severity `Moderate`

Wed, 24 Dec 2025 12:45:00 +0000

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: media: vidtv: Fix use-after-free in vidtv_bridge_dvb_init() KASAN reports a use-after-free: BUG: KASAN: use-after-free in dvb_dmxdev_release+0x4d5/0x5d0 [dvb_core] Call Trace: ... dvb_dmxdev_release+0x4d5/0x5d0 [dvb_core] vidtv_bridge_probe+0x7bf/0xa40 [dvb_vidtv_bridge] platform_probe+0xb6/0x170 ... Allocated by task 1238: ... dvb_register_device+0x1a7/0xa70 [dvb_core] dvb_dmxdev_init+0x2af/0x4a0 [dvb_core] vidtv_bridge_probe+0x766/0xa40 [dvb_vidtv_bridge] ... Freed by task 1238: dvb_register_device+0x6d2/0xa70 [dvb_core] dvb_dmxdev_init+0x2af/0x4a0 [dvb_core] vidtv_bridge_probe+0x766/0xa40 [dvb_vidtv_bridge] ... It is because the error handling in vidtv_bridge_dvb_init() is wrong. First, vidtv_bridge_dmx(dev)_init() will clean themselves when fail, but goto fail_dmx(_dev): calls release functions again, which causes use-after-free. Also, in fail_fe, fail_tuner_probe and fail_demod_probe, j = i will cause out-of-bound when i finished its loop (i == NUM_FE). And the loop releasing is wrong, although now NUM_FE is 1 so it won't cause problem. Fix this by correctly releasing everything.
Title		media: vidtv: Fix use-after-free in vidtv_bridge_dvb_init()
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/0369af6fe33d4053899b121b32e91f870b2cf0ae https://git.kernel.org/stable/c/06398ce69571a43a8a0dd0f1bfe35d221f726a6a https://git.kernel.org/stable/c/8a204a0b4a0d105229735222c515759ea2b126c1 https://git.kernel.org/stable/c/ba8d9405935097e296bcf7a942c3a01df0edb865 https://git.kernel.org/stable/c/c290aa527fd832d278c6388a3ba53a9890fbd74a

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-12-24T12:22:46.939Z

Updated: 2025-12-24T12:22:46.939Z

Reserved: 2025-12-24T12:20:40.330Z

Link: CVE-2022-50725

Vulnrichment

No data.

NVD

Status : Deferred

Published: 2025-12-24T13:15:59.157

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

Link: CVE-2022-50725

Redhat

Severity : Moderate

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

Links: CVE-2022-50725 - Bugzilla

OpenCVE Enrichment

No data.

Weaknesses

No weakness.

Tracking

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