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.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 94edbbc5fe00d03cfe1d4e690d7d2cd36317a935
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < bd2ddb3fe9052ad8703593bbec26ecc7ca92869e
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 39e295a91e80f3b91f61c7ada2bde434dcaba20d
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 90dbad14b109e5fdfb4934ff61e561d11ba3742d
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 6cb48f8890f9b2051d7c34823057296a536a31c5
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < d8fdf33d6fcfb90cbec26299baf2352c84b2d768
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 57f332af1745014cd7e40414814ffaa6bc7d3b5b
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 915b36d701950503c4ea0f6e314b10868e59fce3
Linux Linux affected
Version Status Constraints
2.6.12 affected —
0 unaffected < 2.6.12
5.10.259 unaffected ≤ 5.10.*
5.15.210 unaffected ≤ 5.15.*
6.1.176 unaffected ≤ 6.1.*
6.6.143 unaffected ≤ 6.6.*
6.12.94 unaffected ≤ 6.12.*
6.18.35 unaffected ≤ 6.18.*
7.0.12 unaffected ≤ 7.0.*
7.1 unaffected ≤ *

No data.

No data.

No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/39e295a91e80f3b91f61c7ada2bde434dcaba20d cve-icon
https://git.kernel.org/stable/c/57f332af1745014cd7e40414814ffaa6bc7d3b5b cve-icon
https://git.kernel.org/stable/c/6cb48f8890f9b2051d7c34823057296a536a31c5 cve-icon
https://git.kernel.org/stable/c/90dbad14b109e5fdfb4934ff61e561d11ba3742d cve-icon
https://git.kernel.org/stable/c/915b36d701950503c4ea0f6e314b10868e59fce3 cve-icon
https://git.kernel.org/stable/c/94edbbc5fe00d03cfe1d4e690d7d2cd36317a935 cve-icon
https://git.kernel.org/stable/c/bd2ddb3fe9052ad8703593bbec26ecc7ca92869e cve-icon
https://git.kernel.org/stable/c/d8fdf33d6fcfb90cbec26299baf2352c84b2d768 cve-icon
History

Sun, 19 Jul 2026 15:30:00 +0000

Type Values Removed Values Added
Description 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.
Title USB: serial: mct_u232: fix memory corruption with small endpoint
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-07-19T14:55:07.452Z

Reserved: 2026-07-19T07:54:57.019Z

Link: CVE-2026-63898

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.