{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "07b8481d4aff73d6f451f25e74ea10240ff5131e"
            },
            {
              "fixed": "5d2ea15ba03bf17ed143ff1a0995a4206edc3fb6"
            },
            {
              "fixed": "b78150729762d47c14fe29a2582bdca5568e62b8"
            },
            {
              "fixed": "8301c335305344d4da4ab9442b6a399dacfe5b8d"
            },
            {
              "fixed": "f3d5e77b27fded71dcb97f409262bf0abba0410e"
            },
            {
              "fixed": "66725039f7090afe14c31bd259e2059a68f04023"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.6.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.96"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.39"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64270.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: mms114 - reject an oversized device packet size\n\nmms114_interrupt() reads a packet of touch data from the device into a\nfixed-size on-stack buffer\n\n\tstruct mms114_touch touch[MMS114_MAX_TOUCH];\n\nwhich holds MMS114_MAX_TOUCH (10) events of MMS114_EVENT_SIZE (8) bytes,\ni.e. 80 bytes. The length of the I2C read into it is taken verbatim from\nthe device:\n\n\tpacket_size = mms114_read_reg(data, MMS114_PACKET_SIZE);\n\tif (packet_size \u003c= 0)\n\t\tgoto out;\n\t...\n\terror = __mms114_read_reg(data, MMS114_INFORMATION, packet_size,\n\t\t\t(u8 *)touch);\n\npacket_size is a single device register byte (0x0F) and the only check\nis the lower bound packet_size \u003c= 0; it is never bounded against the\nsize of touch[]. A malfunctioning, malicious or counterfeit controller\n(or an attacker tampering with the I2C bus) can report a packet_size of\nup to 255, so __mms114_read_reg() writes up to 175 bytes past the end of\ntouch[] on the IRQ-thread stack: a stack out-of-bounds write that can\noverwrite the stack canary, saved registers and the return address.\n\nA well-formed device never reports more than the buffer holds, so reject\nan oversized packet and drop the report, consistent with the handler's\nother error paths, rather than reading past the buffer.",
  "id": "CVE-2026-64270",
  "modified": "2026-07-27T03:56:30.537052107Z",
  "published": "2026-07-25T08:49:17.541Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d2ea15ba03bf17ed143ff1a0995a4206edc3fb6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/66725039f7090afe14c31bd259e2059a68f04023"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8301c335305344d4da4ab9442b6a399dacfe5b8d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b78150729762d47c14fe29a2582bdca5568e62b8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f3d5e77b27fded71dcb97f409262bf0abba0410e"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64270.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64270"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "Input: mms114 - reject an oversized device packet size"
}