Not yet scoredPublished Jul 19, 2026

CVE-2026-63899USB: serial: mxuport: fix memory corruption with small endpoint

Updated under an hour ago (Oct 28, 2026, 8:50 AM ET)

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Exploited in the last 30 days

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.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Awaiting Analysis
Record last updated: Jul 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e before 086b858b5f5125bc9d967ea2bd825f83d9f8f29d; from ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e before 2f3661eb2446e1ef593da45e01a3b21a906768ec; from ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e before ccbec56f2f9af008f1574335cc6a668f16603e47; from ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e before be3a1ed4ae51fa8dde57383277d336ce834f2cd9; from ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e before e906545641d34fb1a09a65b4b5cfdff40eb09681; from ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e before 6c0cf56f00f280d72180bb6ce79741bc787a6269; from ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e before b40166b4ef96067620a0f248e74ad9658c8f680c; from ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e before 4085f0dbb1ce2251c9a5938d693de6593f0ab2bd	CNA record

References

References

https://git.kernel.org/stable/c/086b858b5f5125bc9d967ea2bd825f83d9f8f29d
https://git.kernel.org/stable/c/2f3661eb2446e1ef593da45e01a3b21a906768ec
https://git.kernel.org/stable/c/ccbec56f2f9af008f1574335cc6a668f16603e47
https://git.kernel.org/stable/c/be3a1ed4ae51fa8dde57383277d336ce834f2cd9
https://git.kernel.org/stable/c/e906545641d34fb1a09a65b4b5cfdff40eb09681
https://git.kernel.org/stable/c/6c0cf56f00f280d72180bb6ce79741bc787a6269
https://git.kernel.org/stable/c/b40166b4ef96067620a0f248e74ad9658c8f680c
https://git.kernel.org/stable/c/4085f0dbb1ce2251c9a5938d693de6593f0ab2bd

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.