CVE-2026-63956 (GCVE-0-2026-63956)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-19 14:55
VLAI
Title
USB: serial: cypress_m8: fix memory corruption with small endpoint
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 3416eaa1f8f8d516b77de514e14cf8da256d28fb , < 4fcb22218f0a7229b7ce3b3952fb644def293fa5 (git)
Affected: 3416eaa1f8f8d516b77de514e14cf8da256d28fb , < ad3d1628a46134276546d7a12fedf04be9979158 (git)
Affected: 3416eaa1f8f8d516b77de514e14cf8da256d28fb , < 52e18ae0c47c5c89e18fcd8022f287f7cc8802ec (git)
Affected: 3416eaa1f8f8d516b77de514e14cf8da256d28fb , < 4bcaa59f403dbde6328604a500d65ee8d40975d9 (git)
Affected: 3416eaa1f8f8d516b77de514e14cf8da256d28fb , < 1ef25704bd3b625fd151c09feee459479f71ee64 (git)
Affected: 3416eaa1f8f8d516b77de514e14cf8da256d28fb , < 284105c40fc31fff90cdab8a0377aaeb92f87f0e (git)
Affected: 3416eaa1f8f8d516b77de514e14cf8da256d28fb , < 6c13f3bb652bc8665e709ba07122612586aea648 (git)
Affected: 3416eaa1f8f8d516b77de514e14cf8da256d28fb , < e1a9d791fd66ab2431b9e6f6f835823809869047 (git)
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Linux Linux Affected: 2.6.26
Unaffected: 0 , < 2.6.26 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.93 , ≤ 6.12.* (semver)
Unaffected: 6.18.35 , ≤ 6.18.* (semver)
Unaffected: 7.0.12 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "drivers/usb/serial/cypress_m8.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: cypress_m8: fix memory corruption with small endpoint\n\nMake sure that the interrupt-out endpoint max packet size is at least\neight bytes to avoid user-controlled slab corruption or NULL-pointer\ndereference should a malicious device report a smaller size."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T14:55:47.597Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "dateReserved": "2026-07-19T07:54:57.023Z",
    "dateUpdated": "2026-07-19T14:55:47.597Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
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  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.