CVE-2026-89890 (CVSS 7.8)

Description

In the Linux kernel, the following vulnerability has been resolved: media: go7007: defer the ALSA v4l2 put until card release go7007_snd_init() already takes a v4l2_device reference for the ALSA side, but go7007_snd_remove() drops it immediately after calling snd_card_free_when_closed(). That is too early when a userspace process still has the capture PCM open. The ALSA card and its PCM callbacks remain alive until the last file is closed, so the release path can still reach struct go7007 through pcm->private_data and call go7007_snd_hw_free() after the V4L2 release path has freed the object. Move the matching v4l2_device_put() to the ALSA card private_free callback so the existing ALSA reference covers the whole deferred card lifetime.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Other References

https://git.kernel.org/stable/c/0745a59945d927652d892437f9647ed6e87c0677 https://git.kernel.org/stable/c/1bd456afeb8a515137e567967069fce6f8fcd23e https://git.kernel.org/stable/c/1c57d1a3396b2d767d58f10dff09bb397586c714 https://git.kernel.org/stable/c/1c9fdd9465211432d5c0ff70caaec0be245823d5 https://git.kernel.org/stable/c/29fe4d38fb59ec28ca656cb2dabc2b0f78e78980 https://git.kernel.org/stable/c/9c4f9628b8558c87903492a777834cc5be14ded3 https://git.kernel.org/stable/c/b7a0de398ad510426db9c8e96c516ef7abf48b0e https://git.kernel.org/stable/c/e6f1a1ac9b8ccabfec548aef0d0d93eaf4dba4f4

Frequently Asked Questions

What is CVE-2026-89890? +

In the Linux kernel, the following vulnerability has been resolved: media: go7007: defer the ALSA v4l2 put until card release go7007_snd_init() already takes a v4l2_device reference for the ALSA side, but go7007_snd_remove() drops it immediately after calling snd_card_free_when_closed(). That is too early when a userspace process still has the capture PCM open. The ALSA card and its PCM callbacks remain alive until the last file is closed, so the release path can still reach struct go7007 through pcm->private_data and call go7007_snd_hw_free() after the V4L2 release path has freed the object. Move the matching v4l2_device_put() to the ALSA card private_free callback so the existing ALSA reference covers the whole deferred card lifetime. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-89890? +

CVE-2026-89890 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2026-89890? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-89890

Description

CVSS v3.1 Score

References

Other References

Frequently Asked Questions

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