CVE-2026-63899
HIGH severity · CVSS 7.8 · Out-of-bounds write
7.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/086b858b5f5125bc9d967ea2bd825f83d9f8f29d ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/086b858b5f5125bc9d967ea2bd825f83d9f8f29dPatch
- https://git.kernel.org/stable/c/2f3661eb2446e1ef593da45e01a3b21a906768ecPatch
- https://git.kernel.org/stable/c/4085f0dbb1ce2251c9a5938d693de6593f0ab2bdPatch
- https://git.kernel.org/stable/c/6c0cf56f00f280d72180bb6ce79741bc787a6269Patch
- https://git.kernel.org/stable/c/b40166b4ef96067620a0f248e74ad9658c8f680cPatch
- https://git.kernel.org/stable/c/be3a1ed4ae51fa8dde57383277d336ce834f2cd9Patch
- https://git.kernel.org/stable/c/ccbec56f2f9af008f1574335cc6a668f16603e47Patch
- https://git.kernel.org/stable/c/e906545641d34fb1a09a65b4b5cfdff40eb09681Patch