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 ]
References
Configurations
Configuration 1 (hide)
|
History
30 Oct 2026, 14:37
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* |
|
| CWE | CWE-125 | |
| References | () https://git.kernel.org/stable/c/44f9bab8df7750a1e2a4d6cc22d7c9c2dc096aed - Patch | |
| References | () https://git.kernel.org/stable/c/4a4cb0021ebe1fcadb52e04d19ed8d71470a530b - Patch | |
| References | () https://git.kernel.org/stable/c/90664556916de22467097d4c8ceb716d597a5c32 - Patch | |
| References | () https://git.kernel.org/stable/c/9f9bfc80c67f35a275820da7e83a35dface08281 - Patch | |
| References | () https://git.kernel.org/stable/c/aaa66708bfb1dca2acd219d1c1582f9f6d5492cb - Patch | |
| References | () https://git.kernel.org/stable/c/ae03453f2c809ca3cf73753269fa6184dea7160f - Patch | |
| References | () https://git.kernel.org/stable/c/be50533fe7068e86eb7adb81988e6d6a3f6dfe53 - Patch | |
| References | () https://git.kernel.org/stable/c/fcef31a5a85ccf3c313449a866ec6ed7e4132425 - Patch | |
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.1 |
Information
Published : 2026-07-19 16:17
Updated : 2026-10-30 14:37
NVD link : CVE-2026-63902
Mitre link : CVE-2026-63902
CVE.ORG link : CVE-2026-63902
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-125
Out-of-bounds Read