VulnerabilityPublished 17 Sep 2026Updated 19 Oct 2026

CVE-2026-93101: Linux kernel · media: v4l2-async: Unregister sub-device if asc_list is empty

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in e190320cebe921f99973c984ac53f317061a011f : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:47 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e190320cebe921f99973c984ac53f317061a011f, c7201bd08cad791858337e33ffcd90d8ae4147c2, 65e55f34fb2d61cb4f8a5dfcb93848af2aea0f32 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 28a1295795d85a25f2e7dd391c43969e95fcb341, < e190320cebe921f99973c984ac53f317061a011f	Fixed in e190320cebe921f99973c984ac53f317061a011f
LinuxLinux	Affected ≥ 28a1295795d85a25f2e7dd391c43969e95fcb341, < c7201bd08cad791858337e33ffcd90d8ae4147c2	Fixed in c7201bd08cad791858337e33ffcd90d8ae4147c2
LinuxLinux	Affected ≥ 28a1295795d85a25f2e7dd391c43969e95fcb341, < 65e55f34fb2d61cb4f8a5dfcb93848af2aea0f32	Fixed in 65e55f34fb2d61cb4f8a5dfcb93848af2aea0f32
LinuxLinux	Affected ≥ 28a1295795d85a25f2e7dd391c43969e95fcb341, < 9fb74dce5c650cb23b60f6ba0ffcd5024e948a75	Fixed in 9fb74dce5c650cb23b60f6ba0ffcd5024e948a75
LinuxLinux	Affected ≥ 28a1295795d85a25f2e7dd391c43969e95fcb341, < 4e72f13d58c4245c177a9d5f54579345554f354d	Fixed in 4e72f13d58c4245c177a9d5f54579345554f354d
LinuxLinux	Affected =6.6	Fixed in–

AI-suggested

A fix has been implemented in the Linux kernel to address this issue. Users should update to the fixed kernel versions identified by the provided commit hashes. No additional mitigation steps are necessary beyond applying the official patch.

Description

A vulnerability in the Linux kernel's media subsystem involving v4l2-async handling causes a crash when an em28xx USB device using the i2c tvp5150 driver is disconnected. The issue arises because the em28xx driver predates v4l2_async and does not properly unregister sub-devices when the asc_list is empty. This leads to v4l2_async_unregister_subdev() not calling v4l2_device_unregister_subdev(), resulting in a crash. The vulnerability has been fixed by modifying the code to ensure unregistration occurs even if asc_list is empty.

Impact

The vulnerability causes a system crash upon disconnection of certain USB devices (em28xx with tvp5150 driver), potentially leading to denial of service or system instability. There is no indication of code execution or privilege escalation. No known exploits in the wild have been reported.

Summary

The Linux kernel media subsystem had a flaw where disconnecting an em28xx USB device using the i2c tvp5150 driver caused a crash. This was due to the em28xx driver not using v4l2_async, unlike the tvp5150 i2c module. In the specific case where the sub-device's asc_list is empty, v4l2_async_unregister_subdev() failed to call v4l2_device_unregister_subdev(), leaving the sub-device improperly unregistered. The fix ensures that v4l2_device_unregister_subdev() is called even when asc_list is empty, preventing the crash.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 14:47 UTC

Technical details

References

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