CVE-2026-63898
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: mct_u232: fix memory corruption with small endpoint The driver overrides the maximum transfer size for a specific device which only accepts 16 byte packets for its 32 byte bulk-out endpoint. Make sure to never increase the maximum transfer size to prevent slab corruption should a malicious device report a smaller endpoint max packet size than expected.
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/39e295a91e80f3b91f61c7ada2bde434dcaba20d ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/39e295a91e80f3b91f61c7ada2bde434dcaba20dPatch
- https://git.kernel.org/stable/c/57f332af1745014cd7e40414814ffaa6bc7d3b5bPatch
- https://git.kernel.org/stable/c/6cb48f8890f9b2051d7c34823057296a536a31c5Patch
- https://git.kernel.org/stable/c/90dbad14b109e5fdfb4934ff61e561d11ba3742dPatch
- https://git.kernel.org/stable/c/915b36d701950503c4ea0f6e314b10868e59fce3Patch
- https://git.kernel.org/stable/c/94edbbc5fe00d03cfe1d4e690d7d2cd36317a935Patch
- https://git.kernel.org/stable/c/bd2ddb3fe9052ad8703593bbec26ecc7ca92869ePatch
- https://git.kernel.org/stable/c/d8fdf33d6fcfb90cbec26299baf2352c84b2d768Patch