CVE-2026-63902

CVE CVE-2026-63902EUVD EUVD-2026-45675Published 2026-07-19T14:55:10.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: USB: serial: cypress_m8: validate interrupt packet headers cypress_read_int_callback() parses the interrupt-in buffer according to the selected Cypress packet format. Format 1 has a two-byte status/count header and format 2 has a one-byte combined status/count header. The usb-serial core sizes the interrupt-in buffer from the endpoint descriptor's wMaxPacketSize, and successful interrupt transfers can complete short when URB_SHORT_NOT_OK is not set. Check that the completed packet contains the selected header before reading it. Malformed short reports are ignored and the interrupt URB is resubmitted through the existing retry path, preventing out-of-bounds header-byte reads. KASAN report as below: KASAN slab-out-of-bounds in cypress_read_int_callback+0x240/0x7f0 Read of size 1 Call trace: cypress_read_int_callback() (drivers/usb/serial/cypress_m8.c:1009) __usb_hcd_giveback_urb() dummy_timer() [ johan: use constants in header length sanity checks ]

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 3416eaa1f8f8d516b77de514e14cf8da256d28fb <4a4cb0021ebe1fcadb52e04d19ed8d71470a530b; 3416eaa1f8f8d516b77de514e14cf8da256d28fb <44f9bab8df7750a1e2a4d6cc22d7c9c2dc096aed; patch: 6.6.143; patch: 5.10.259; 3416eaa1f8f8d516b77de514e14cf8da256d28fb <90664556916de22467097d4c8ceb716d597a5c32; patch: 6.18.35; 3416eaa1f8f8d516b77de514e14cf8da256d28fb <be50533fe7068e86eb7adb81988e6d6a3f6dfe53; patch: 0; patch: 6.12.93; patch: 7.1; 3416eaa1f8f8d516b77de514e14cf8da256d28fb <aaa66708bfb1dca2acd219d1c1582f9f6d5492cb; 3416eaa1f8f8d516b77de514e14cf8da256d28fb <9f9bfc80c67f35a275820da7e83a35dface08281; patch: 5.15.210; 2.6.26; 3416eaa1f8f8d516b77de514e14cf8da256d28fb <ae03453f2c809ca3cf73753269fa6184dea7160f; patch: 7.0.12; 3416eaa1f8f8d516b77de514e14cf8da256d28fb <fcef31a5a85ccf3c313449a866ec6ed7e4132425; patch: 6.1.176

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

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Linux — Linux

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