USB: serial: mxuport: fix memory corruption with small endpoint
Summary
| CVE | CVE-2026-63899 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-19 16:17:07 UTC |
| Updated | 2026-07-19 16:17:07 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.002100000 probability, percentile 0.113600000 (date 2026-07-20)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e 086b858b5f5125bc9d967ea2bd825f83d9f8f29d git | Not specified |
| CNA | Linux | Linux | affected ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e 2f3661eb2446e1ef593da45e01a3b21a906768ec git | Not specified |
| CNA | Linux | Linux | affected ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e ccbec56f2f9af008f1574335cc6a668f16603e47 git | Not specified |
| CNA | Linux | Linux | affected ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e be3a1ed4ae51fa8dde57383277d336ce834f2cd9 git | Not specified |
| CNA | Linux | Linux | affected ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e e906545641d34fb1a09a65b4b5cfdff40eb09681 git | Not specified |
| CNA | Linux | Linux | affected ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e 6c0cf56f00f280d72180bb6ce79741bc787a6269 git | Not specified |
| CNA | Linux | Linux | affected ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e b40166b4ef96067620a0f248e74ad9658c8f680c git | Not specified |
| CNA | Linux | Linux | affected ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e 4085f0dbb1ce2251c9a5938d693de6593f0ab2bd git | Not specified |
| CNA | Linux | Linux | affected 3.14 | Not specified |
| CNA | Linux | Linux | unaffected 3.14 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.259 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.210 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.176 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.143 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.93 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.35 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0.12 7.0.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/e906545641d34fb1a09a65b4b5cfdff40eb09681 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/4085f0dbb1ce2251c9a5938d693de6593f0ab2bd | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/be3a1ed4ae51fa8dde57383277d336ce834f2cd9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b40166b4ef96067620a0f248e74ad9658c8f680c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/6c0cf56f00f280d72180bb6ce79741bc787a6269 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/2f3661eb2446e1ef593da45e01a3b21a906768ec | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ccbec56f2f9af008f1574335cc6a668f16603e47 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/086b858b5f5125bc9d967ea2bd825f83d9f8f29d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.