FKIE_CVE-2026-63956

Vulnerability from fkie_nvd - Published: 2026-07-19 16:17 - Updated: 2026-07-19 16:17
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1ef25704bd3b625fd151c09feee459479f71ee64
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/284105c40fc31fff90cdab8a0377aaeb92f87f0e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4bcaa59f403dbde6328604a500d65ee8d40975d9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4fcb22218f0a7229b7ce3b3952fb644def293fa5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/52e18ae0c47c5c89e18fcd8022f287f7cc8802ec
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6c13f3bb652bc8665e709ba07122612586aea648
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ad3d1628a46134276546d7a12fedf04be9979158
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e1a9d791fd66ab2431b9e6f6f835823809869047
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/serial/cypress_m8.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4fcb22218f0a7229b7ce3b3952fb644def293fa5",
              "status": "affected",
              "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
              "versionType": "git"
            },
            {
              "lessThan": "ad3d1628a46134276546d7a12fedf04be9979158",
              "status": "affected",
              "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
              "versionType": "git"
            },
            {
              "lessThan": "52e18ae0c47c5c89e18fcd8022f287f7cc8802ec",
              "status": "affected",
              "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
              "versionType": "git"
            },
            {
              "lessThan": "4bcaa59f403dbde6328604a500d65ee8d40975d9",
              "status": "affected",
              "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
              "versionType": "git"
            },
            {
              "lessThan": "1ef25704bd3b625fd151c09feee459479f71ee64",
              "status": "affected",
              "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
              "versionType": "git"
            },
            {
              "lessThan": "284105c40fc31fff90cdab8a0377aaeb92f87f0e",
              "status": "affected",
              "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
              "versionType": "git"
            },
            {
              "lessThan": "6c13f3bb652bc8665e709ba07122612586aea648",
              "status": "affected",
              "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
              "versionType": "git"
            },
            {
              "lessThan": "e1a9d791fd66ab2431b9e6f6f835823809869047",
              "status": "affected",
              "version": "3416eaa1f8f8d516b77de514e14cf8da256d28fb",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/serial/cypress_m8.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.26"
            },
            {
              "lessThan": "2.6.26",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.259",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.93",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.35",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "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."
    }
  ],
  "id": "CVE-2026-63956",
  "lastModified": "2026-07-19T16:17:14.410",
  "metrics": {},
  "published": "2026-07-19T16:17:14.410",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1ef25704bd3b625fd151c09feee459479f71ee64"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/284105c40fc31fff90cdab8a0377aaeb92f87f0e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4bcaa59f403dbde6328604a500d65ee8d40975d9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4fcb22218f0a7229b7ce3b3952fb644def293fa5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/52e18ae0c47c5c89e18fcd8022f287f7cc8802ec"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6c13f3bb652bc8665e709ba07122612586aea648"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ad3d1628a46134276546d7a12fedf04be9979158"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e1a9d791fd66ab2431b9e6f6f835823809869047"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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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

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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