CVE-2026-63899
highIn the Linux kernel, the following vulnerability has been resolved: USB: serial: mxuport: fix memory corruption with small endpoint Make sure that the bulk-o…
Vendor / product: Linux — linux kernel
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
7.8
7.8 (CVSS v3.1)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-07-19 16:17
Modified: 2026-10-30 14:38
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-30 14:40 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
linux / linux_kernel ≥3.14 <5.10.259, ≥5.11 <5.15.210, ≥5.16 <6.1.176, ≥6.2 <6.6.143, ≥6.7 <6.12.93, ≥6.13 <6.18.35
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://git.kernel.org/stable/c/086b858b5f5125bc9d967ea2bd825f83d9f8f29d
Patch / mitigation: https://git.kernel.org/stable/c/2f3661eb2446e1ef593da45e01a3b21a906768ec
Patch / mitigation: https://git.kernel.org/stable/c/4085f0dbb1ce2251c9a5938d693de6593f0ab2bd
Patch / mitigation: https://git.kernel.org/stable/c/6c0cf56f00f280d72180bb6ce79741bc787a6269
Patch / mitigation: https://git.kernel.org/stable/c/b40166b4ef96067620a0f248e74ad9658c8f680c
Patch / mitigation: https://git.kernel.org/stable/c/be3a1ed4ae51fa8dde57383277d336ce834f2cd9
Patch / mitigation: https://git.kernel.org/stable/c/ccbec56f2f9af008f1574335cc6a668f16603e47
Patch / mitigation: https://git.kernel.org/stable/c/e906545641d34fb1a09a65b4b5cfdff40eb09681
References
- https://git.kernel.org/stable/c/086b858b5f5125bc9d967ea2bd825f83d9f8f29d 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/2f3661eb2446e1ef593da45e01a3b21a906768ec 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/4085f0dbb1ce2251c9a5938d693de6593f0ab2bd 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/6c0cf56f00f280d72180bb6ce79741bc787a6269 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/b40166b4ef96067620a0f248e74ad9658c8f680c 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/be3a1ed4ae51fa8dde57383277d336ce834f2cd9 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/ccbec56f2f9af008f1574335cc6a668f16603e47 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/e906545641d34fb1a09a65b4b5cfdff40eb09681 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Data sources
NVD CVE API 2.0 — fetched 2026-10-30 14:40 UTC · record ↗