Out-of-bounds read in Linux kernel - CVE-2026-90090
Published: September 19, 2026
Vulnerability identifier: #VU151392
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90090
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in the Linux kernel btmtksdio_tx_packet() transmit path when transmitting Bluetooth packets over SDIO. A local user can send a packet that causes memory beyond the packet data to be read and sent to the device to disclose sensitive information.
Affected software
Linux kernel
How to mitigate CVE-2026-90090
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/0b71a6caaf284915c8cf9cd320ecee9f0361824a
- https://git.kernel.org/stable/c/7b37556d7d801b79096c7ba8ea92db2338aa8b00
- https://git.kernel.org/stable/c/7b80d2701a68456c536f82e577dbed2f60ccb82b
- https://git.kernel.org/stable/c/9a785ea864214aaffd8300683825c3f788d0b634
- https://git.kernel.org/stable/c/c8742f53c9ef623decd5285403df0e5b5273c9fd
- https://git.kernel.org/stable/c/fa0ad2d277c7adead61d1c22411c55cea6990c2a