CVE-2026-63899
Published Jul 19, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: USB: serial: mxuport: fix memory corruption with small endpoint Make sure that the bulk-out endpoint max packet size is at least eight bytes to avoid user-controlled slab corruption should a malicious device report a smaller size.
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References
Other References
https://git.kernel.org/stable/c/086b858b5f5125bc9d967ea2bd825f83d9f8f29d
https://git.kernel.org/stable/c/2f3661eb2446e1ef593da45e01a3b21a906768ec
https://git.kernel.org/stable/c/4085f0dbb1ce2251c9a5938d693de6593f0ab2bd
https://git.kernel.org/stable/c/6c0cf56f00f280d72180bb6ce79741bc787a6269
https://git.kernel.org/stable/c/b40166b4ef96067620a0f248e74ad9658c8f680c
https://git.kernel.org/stable/c/be3a1ed4ae51fa8dde57383277d336ce834f2cd9
https://git.kernel.org/stable/c/ccbec56f2f9af008f1574335cc6a668f16603e47
https://git.kernel.org/stable/c/e906545641d34fb1a09a65b4b5cfdff40eb09681
Frequently Asked Questions
What is CVE-2026-63899? +
In the Linux kernel, the following vulnerability has been resolved:
USB: serial: mxuport: fix memory corruption with small endpoint
Make sure that the bulk-out endpoint max packet size is at least eight
bytes to avoid user-controlled slab corruption should a malicious device
report a smaller size.
How do I check if I'm vulnerable to CVE-2026-63899? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.