CVE-2026-89892

Description

In the Linux kernel, the following vulnerability has been resolved: media: em28xx: defer audio-only extension registration The audio-only path registers extensions while probing the primary device. For a dual-TS board, this happens before dev_next is created. The duplicate device inherits is_audio_only and is then independently inserted into em28xx_devlist. The list is intended to contain only primary devices: extension operations reach the secondary device through dev_next. The independently linked secondary can be freed during disconnect while its list node remains reachable, resulting in a use-after-free. Defer audio-only extension registration to the module-request work item. It runs only after probing has completed construction of the optional secondary device, so only the primary is registered and extension callbacks reach the secondary through dev_next.

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EPSS — Exploit Prediction

0.0021

Probability of exploitation

0.11%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/0da1e627f4fc9d0e947fdae90913042120878923 https://git.kernel.org/stable/c/1abe9524dec0fd26e9ceb8d586034d6f68dd8273 https://git.kernel.org/stable/c/4666197ca4f7d80cd3b0292054fe45d76be9ba04 https://git.kernel.org/stable/c/4e11c45dfdc72ab656067b1df8fcebaf52fd4715 https://git.kernel.org/stable/c/95f76f51937fdfb0fc1e14cae606b1ef574a56f3 https://git.kernel.org/stable/c/d06067ee32620f272cfb80c7bc7c572ad4e74724 https://git.kernel.org/stable/c/f8d7e77d9c621b42a191c67a9b37bec23dc1d555 https://git.kernel.org/stable/c/f9322ac9f862961d7f377b87ec26c8565af7e073

Frequently Asked Questions

What is CVE-2026-89892? +

In the Linux kernel, the following vulnerability has been resolved: media: em28xx: defer audio-only extension registration The audio-only path registers extensions while probing the primary device. For a dual-TS board, this happens before dev_next is created. The duplicate device inherits is_audio_only and is then independently inserted into em28xx_devlist. The list is intended to contain only primary devices: extension operations reach the secondary device through dev_next. The independently linked secondary can be freed during disconnect while its list node remains reachable, resulting in a use-after-free. Defer audio-only extension registration to the module-request work item. It runs only after probing has completed construction of the optional secondary device, so only the primary is registered and extension callbacks reach the secondary through dev_next.

How do I check if I'm vulnerable to CVE-2026-89892? +

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.