CVE-2026-64487
CVE CVE-2026-64487EUVD EUVD-2026-48831Published 2026-07-25T08:51:46.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: ALSA: caiaq: fix out-of-bounds read in the Traktor Kontrol S4 input parser snd_usb_caiaq_tks4_dispatch() decodes the Traktor Kontrol S4 input stream in fixed 16-byte (TKS4_MSGBLOCK_SIZE) message blocks. On every iteration it advances buf and subtracts the block size while looping on "while (len)". len is urb->actual_length. That value is supplied by the device and is not guaranteed to be a multiple of 16. When a final short block leaves len between 1 and 15, the loop runs once more, reads up to buf[15], and then does "len -= TKS4_MSGBLOCK_SIZE". As len is unsigned this underflows to a huge value. The loop then keeps iterating and walking buf far past the end of the 512-byte ep4_in_buf, reading out of bounds until a bogus block id happens to be hit. Iterate only while a full message block is available. This stops the unsigned underflow and silently drops any trailing partial block, which carries no complete control value anyway. The sibling endpoint-4 parsers are not affected. The Traktor Kontrol X1 and Maschine arms in snd_usb_caiaq_ep4_reply_dispatch() floor urb->actual_length before dispatching.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 15c5ab607045e278ebf4d2ca4aea2250617d50ca <0680413f2f10aab43878dd3db711a6a9e45bab7c; 15c5ab607045e278ebf4d2ca4aea2250617d50ca <a5fd3122283bf75c04f6414bf610100beb0565b0; patch: 6.12.96; 15c5ab607045e278ebf4d2ca4aea2250617d50ca <884f575cc6acb136eb4a161d925147f85b59c27e; patch: 6.1.178; patch: 0; patch: 7.1.4; 15c5ab607045e278ebf4d2ca4aea2250617d50ca <de5f9edc705497b1b2c6b173b22f283486d2fd91; patch: 5.10.261; 15c5ab607045e278ebf4d2ca4aea2250617d50ca <f7f3f9fd81e7adbaa12c2e62ee07f0e094a543fd; 15c5ab607045e278ebf4d2ca4aea2250617d50ca <05df59b9a61f7ca66548df079d306c41da23845d; patch: 6.18.39; 2.6.37; patch: 5.15.212; patch: 6.6.145; 15c5ab607045e278ebf4d2ca4aea2250617d50ca <70d6d4cfa4ad09688aed2ec8a0cfa72c31f60334; patch: 7.2-rc1; 15c5ab607045e278ebf4d2ca4aea2250617d50ca <3cad86197c7bf8b45bb1d8adc1099d0913e80469
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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