USB: serial: cypress_m8: fix memory corruption with small endpoint
Summary
| CVE | CVE-2026-63956 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-19 16:17:14 UTC |
| Updated | 2026-07-19 16:17:14 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: USB: serial: cypress_m8: fix memory corruption with small endpoint Make sure that the interrupt-out endpoint max packet size is at least eight bytes to avoid user-controlled slab corruption or NULL-pointer dereference should a malicious device report a smaller size. |
Risk And Classification
EPSS: 0.002100000 probability, percentile 0.113640000 (date 2026-07-20)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 3416eaa1f8f8d516b77de514e14cf8da256d28fb 4fcb22218f0a7229b7ce3b3952fb644def293fa5 git | Not specified |
| CNA | Linux | Linux | affected 3416eaa1f8f8d516b77de514e14cf8da256d28fb ad3d1628a46134276546d7a12fedf04be9979158 git | Not specified |
| CNA | Linux | Linux | affected 3416eaa1f8f8d516b77de514e14cf8da256d28fb 52e18ae0c47c5c89e18fcd8022f287f7cc8802ec git | Not specified |
| CNA | Linux | Linux | affected 3416eaa1f8f8d516b77de514e14cf8da256d28fb 4bcaa59f403dbde6328604a500d65ee8d40975d9 git | Not specified |
| CNA | Linux | Linux | affected 3416eaa1f8f8d516b77de514e14cf8da256d28fb 1ef25704bd3b625fd151c09feee459479f71ee64 git | Not specified |
| CNA | Linux | Linux | affected 3416eaa1f8f8d516b77de514e14cf8da256d28fb 284105c40fc31fff90cdab8a0377aaeb92f87f0e git | Not specified |
| CNA | Linux | Linux | affected 3416eaa1f8f8d516b77de514e14cf8da256d28fb 6c13f3bb652bc8665e709ba07122612586aea648 git | Not specified |
| CNA | Linux | Linux | affected 3416eaa1f8f8d516b77de514e14cf8da256d28fb e1a9d791fd66ab2431b9e6f6f835823809869047 git | Not specified |
| CNA | Linux | Linux | affected 2.6.26 | Not specified |
| CNA | Linux | Linux | unaffected 2.6.26 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/ad3d1628a46134276546d7a12fedf04be9979158 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/284105c40fc31fff90cdab8a0377aaeb92f87f0e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/e1a9d791fd66ab2431b9e6f6f835823809869047 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/1ef25704bd3b625fd151c09feee459479f71ee64 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/4bcaa59f403dbde6328604a500d65ee8d40975d9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/6c13f3bb652bc8665e709ba07122612586aea648 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/4fcb22218f0a7229b7ce3b3952fb644def293fa5 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/52e18ae0c47c5c89e18fcd8022f287f7cc8802ec | 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.