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CVE-2026-74642: ALSA: usb: Fix UAF at delayed release of MIDI2 EPs

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-22 · updated 2026-10-14

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb: Fix UAF at delayed release of MIDI2 EPs The recent fix for UAF in ump_to_endpoint() caused another UAF because it tries to dereference the UMP endpoint object, but this might be executed at a delayed context where the endpoint has been already released. Add private_free to clear the associated data for avoiding the further dereference for delayed releases.

Affected products

• Linux kernel: from 6.6.151 before 6.6.152; from 6.12.103 before 6.12.104; from 6.18.44 before 6.18.45; from 7.1.8 before 7.1.9 — fixed in 6.12.104, 6.18.45, 6.6.152, 7.1.9

How to fix

Upgrade to a fixed version: Linux kernel 6.12.104, 6.18.45, 6.6.152, 7.1.9. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/422d8a02de5ce6a29d616d55e5ead5dec69ac1d7
• https://git.kernel.org/stable/c/d217d723c5e43881b952cdb978477f7f2dc0b6d7
• https://git.kernel.org/stable/c/d431941825d357be7d9ab0cb7505e3a1963bd89e
• https://git.kernel.org/stable/c/f8a80cfb68613fb7e6452b66447dbc63f435d140
• https://git.kernel.org/stable/c/f9d492a39ebeb1a56f13ec6dd165a18a48dec812

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