CVE-2026-90060
Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: control: Don't add invalid kcontrols to LED layer The kcontrol LED state layer tries to track the all associated kcontrol elements with naive assumptions that they are readable. But one can create a write-only element that has no get callback (even a user element can do it), and this may lead to a NULL dereference at the call chain of snd_ctl_led_notify(), as found by syzkaller. For avoiding the Oops, add a sanity check of the kcontrol's info and get callbacks, and just skip the invalid kcontrols before assigning the kctl to the LED layer.
How to fix
- Linux Linux6e152cbfac3a2a62f79df7d23d621917c20367eb, 3b8a540b36aa064822c701e4e0a1dea2cd4ec5b0, 3d20cd049fc5f51f80e24a2db7a3cf00593c79e4, 2f0c97b1a32fba8e81a69f6231aa0b3c9b6bc581, 18c08f84ca483029f04e426ec7ca3b5d3684cf22, 74e3b979ce8b78a690f8b94ccf2e2c965f7f5c11 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 22d8de62f11b287b279f1d4473a78c7d5e53e7bc ≤ v < 6e152cbfac3a2a62f79df7d23d621917c20367eb, 22d8de62f11b287b279f1d4473a78c7d5e53e7bc ≤ v < 3b8a540b36aa064822c701e4e0a1dea2cd4ec5b0, 22d8de62f11b287b279f1d4473a78c7d5e53e7bc ≤ v < 3d20cd049fc5f51f80e24a2db7a3cf00593c79e4, 22d8de62f11b287b279f1d4473a78c7d5e53e7bc ≤ v < 2f0c97b1a32fba8e81a69f6231aa0b3c9b6bc581, 22d8de62f11b287b279f1d4473a78c7d5e53e7bc ≤ v < 18c08f84ca483029f04e426ec7ca3b5d3684cf22, 22d8de62f11b287b279f1d4473a78c7d5e53e7bc ≤ v < 74e3b979ce8b78a690f8b94ccf2e2c965f7f5c11, 5.13 | 6e152cbfac3a2a62f79df7d23d621917c20367eb, 3b8a540b36aa064822c701e4e0a1dea2cd4ec5b0, 3d20cd049fc5f51f80e24a2db7a3cf00593c79e4, 2f0c97b1a32fba8e81a69f6231aa0b3c9b6bc581, 18c08f84ca483029f04e426ec7ca3b5d3684cf22, 74e3b979ce8b78a690f8b94ccf2e2c965f7f5c11 |
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