CVE-2026-64191 (GCVE-0-2026-64191)

Vulnerability from cvelistv5 – Published: 2026-07-20 16:27 – Updated: 2026-07-20 16:27
VLAI
Title
i2c: stub: Reject I2C block transfers with invalid length
Summary
In the Linux kernel, the following vulnerability has been resolved: i2c: stub: Reject I2C block transfers with invalid length The I2C_SMBUS_I2C_BLOCK_DATA case in stub_xfer() uses data->block[0] as the transfer length. The existing check only clamps it to avoid overrunning the chip->words[256] register array, but does not validate it against I2C_SMBUS_BLOCK_MAX (32), which is the limit of the union i2c_smbus_data.block buffer (34 bytes total). The driver is a development/test tool (CONFIG_I2C_STUB=m, not built by default) that must be loaded with a chip_addr= parameter. A local user with access to /dev/i2c-* can issue an I2C_SMBUS ioctl with I2C_SMBUS_I2C_BLOCK_DATA and data->block[0] > 32, causing stub_xfer() to read or write past the end of the union i2c_smbus_data.block buffer: BUG: KASAN: stack-out-of-bounds in stub_xfer (drivers/i2c/i2c-stub.c:223) Read of size 1 at addr ffff88800abcfd92 by task exploit/81 Call Trace: <TASK> stub_xfer (drivers/i2c/i2c-stub.c:223) __i2c_smbus_xfer (drivers/i2c/i2c-core-smbus.c:593) i2c_smbus_xfer (drivers/i2c/i2c-core-smbus.c:536) i2cdev_ioctl_smbus (drivers/i2c/i2c-dev.c:391) i2cdev_ioctl (drivers/i2c/i2c-dev.c:478) __x64_sys_ioctl (fs/ioctl.c:583) do_syscall_64 (arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) </TASK> The bug exists because i2c-stub implements .smbus_xfer directly, bypassing the I2C_SMBUS_BLOCK_MAX validation in i2c_smbus_xfer_emulated(). The I2C_SMBUS_BLOCK_DATA case in the same function correctly validates against I2C_SMBUS_BLOCK_MAX, but the I2C_SMBUS_I2C_BLOCK_DATA case does not. Fix by rejecting transfers with data->block[0] == 0 or data->block[0] > I2C_SMBUS_BLOCK_MAX with -EINVAL, consistent with both the I2C_SMBUS_BLOCK_DATA case in the same function and the I2C_SMBUS_I2C_BLOCK_DATA validation in i2c_smbus_xfer_emulated().
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 4710317891e4824ce1510a6b5066abbd3e917750 , < 7e9072dbd5f2f17934751873450d2c22080ead80 (git)
Affected: 4710317891e4824ce1510a6b5066abbd3e917750 , < 21e87f336ac6303fed54a69b1d0d79a23b25c8d0 (git)
Affected: 4710317891e4824ce1510a6b5066abbd3e917750 , < 3fd225f3e4cd67ec8ddab1afed9da03c7c43537c (git)
Affected: 4710317891e4824ce1510a6b5066abbd3e917750 , < 1c4ffe6b4f04365485ed58d64c9bb86b46fc9037 (git)
Affected: 4710317891e4824ce1510a6b5066abbd3e917750 , < 4bd8635f28c135a08aac6badcd7d9b5cdb34335f (git)
Affected: 4710317891e4824ce1510a6b5066abbd3e917750 , < 5f4d2bd028ebb6e4c09a9d64842546022321d4a7 (git)
Affected: 4710317891e4824ce1510a6b5066abbd3e917750 , < 0526931b16e5a118d367b7bfce7d797e63f7ac69 (git)
Affected: 4710317891e4824ce1510a6b5066abbd3e917750 , < 6036b5067a8199ba7a2dc7b377d4b9dd276d5f9e (git)
Create a notification for this product.
Linux Linux Affected: 2.6.33
Unaffected: 0 , < 2.6.33 (semver)
Unaffected: 5.10.260 , ≤ 5.10.* (semver)
Unaffected: 5.15.211 , ≤ 5.15.* (semver)
Unaffected: 6.1.177 , ≤ 6.1.* (semver)
Unaffected: 6.6.144 , ≤ 6.6.* (semver)
Unaffected: 6.12.95 , ≤ 6.12.* (semver)
Unaffected: 6.18.37 , ≤ 6.18.* (semver)
Unaffected: 7.0.14 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/i2c/i2c-stub.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7e9072dbd5f2f17934751873450d2c22080ead80",
              "status": "affected",
              "version": "4710317891e4824ce1510a6b5066abbd3e917750",
              "versionType": "git"
            },
            {
              "lessThan": "21e87f336ac6303fed54a69b1d0d79a23b25c8d0",
              "status": "affected",
              "version": "4710317891e4824ce1510a6b5066abbd3e917750",
              "versionType": "git"
            },
            {
              "lessThan": "3fd225f3e4cd67ec8ddab1afed9da03c7c43537c",
              "status": "affected",
              "version": "4710317891e4824ce1510a6b5066abbd3e917750",
              "versionType": "git"
            },
            {
              "lessThan": "1c4ffe6b4f04365485ed58d64c9bb86b46fc9037",
              "status": "affected",
              "version": "4710317891e4824ce1510a6b5066abbd3e917750",
              "versionType": "git"
            },
            {
              "lessThan": "4bd8635f28c135a08aac6badcd7d9b5cdb34335f",
              "status": "affected",
              "version": "4710317891e4824ce1510a6b5066abbd3e917750",
              "versionType": "git"
            },
            {
              "lessThan": "5f4d2bd028ebb6e4c09a9d64842546022321d4a7",
              "status": "affected",
              "version": "4710317891e4824ce1510a6b5066abbd3e917750",
              "versionType": "git"
            },
            {
              "lessThan": "0526931b16e5a118d367b7bfce7d797e63f7ac69",
              "status": "affected",
              "version": "4710317891e4824ce1510a6b5066abbd3e917750",
              "versionType": "git"
            },
            {
              "lessThan": "6036b5067a8199ba7a2dc7b377d4b9dd276d5f9e",
              "status": "affected",
              "version": "4710317891e4824ce1510a6b5066abbd3e917750",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/i2c/i2c-stub.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.33"
            },
            {
              "lessThan": "2.6.33",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.260",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.211",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.177",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.144",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.95",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.260",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.211",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.177",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.144",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.95",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.37",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.14",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: stub: Reject I2C block transfers with invalid length\n\nThe I2C_SMBUS_I2C_BLOCK_DATA case in stub_xfer() uses data-\u003eblock[0]\nas the transfer length. The existing check only clamps it to avoid\noverrunning the chip-\u003ewords[256] register array, but does not validate\nit against I2C_SMBUS_BLOCK_MAX (32), which is the limit of the union\ni2c_smbus_data.block buffer (34 bytes total). The driver is a\ndevelopment/test tool (CONFIG_I2C_STUB=m, not built by default)\nthat must be loaded with a chip_addr= parameter.\n\nA local user with access to /dev/i2c-* can issue an I2C_SMBUS ioctl\nwith I2C_SMBUS_I2C_BLOCK_DATA and data-\u003eblock[0] \u003e 32, causing\nstub_xfer() to read or write past the end of the union\ni2c_smbus_data.block buffer:\n\n BUG: KASAN: stack-out-of-bounds in stub_xfer (drivers/i2c/i2c-stub.c:223)\n Read of size 1 at addr ffff88800abcfd92 by task exploit/81\n Call Trace:\n  \u003cTASK\u003e\n  stub_xfer (drivers/i2c/i2c-stub.c:223)\n  __i2c_smbus_xfer (drivers/i2c/i2c-core-smbus.c:593)\n  i2c_smbus_xfer (drivers/i2c/i2c-core-smbus.c:536)\n  i2cdev_ioctl_smbus (drivers/i2c/i2c-dev.c:391)\n  i2cdev_ioctl (drivers/i2c/i2c-dev.c:478)\n  __x64_sys_ioctl (fs/ioctl.c:583)\n  do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n  \u003c/TASK\u003e\n\nThe bug exists because i2c-stub implements .smbus_xfer directly,\nbypassing the I2C_SMBUS_BLOCK_MAX validation in\ni2c_smbus_xfer_emulated(). The I2C_SMBUS_BLOCK_DATA case in the same\nfunction correctly validates against I2C_SMBUS_BLOCK_MAX, but the\nI2C_SMBUS_I2C_BLOCK_DATA case does not.\n\nFix by rejecting transfers with data-\u003eblock[0] == 0 or\ndata-\u003eblock[0] \u003e I2C_SMBUS_BLOCK_MAX with -EINVAL, consistent with\nboth the I2C_SMBUS_BLOCK_DATA case in the same function and the\nI2C_SMBUS_I2C_BLOCK_DATA validation in i2c_smbus_xfer_emulated()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-20T16:27:51.120Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7e9072dbd5f2f17934751873450d2c22080ead80"
        },
        {
          "url": "https://git.kernel.org/stable/c/21e87f336ac6303fed54a69b1d0d79a23b25c8d0"
        },
        {
          "url": "https://git.kernel.org/stable/c/3fd225f3e4cd67ec8ddab1afed9da03c7c43537c"
        },
        {
          "url": "https://git.kernel.org/stable/c/1c4ffe6b4f04365485ed58d64c9bb86b46fc9037"
        },
        {
          "url": "https://git.kernel.org/stable/c/4bd8635f28c135a08aac6badcd7d9b5cdb34335f"
        },
        {
          "url": "https://git.kernel.org/stable/c/5f4d2bd028ebb6e4c09a9d64842546022321d4a7"
        },
        {
          "url": "https://git.kernel.org/stable/c/0526931b16e5a118d367b7bfce7d797e63f7ac69"
        },
        {
          "url": "https://git.kernel.org/stable/c/6036b5067a8199ba7a2dc7b377d4b9dd276d5f9e"
        }
      ],
      "title": "i2c: stub: Reject I2C block transfers with invalid length",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64191",
    "datePublished": "2026-07-20T16:27:51.120Z",
    "dateReserved": "2026-07-19T07:54:57.040Z",
    "dateUpdated": "2026-07-20T16:27:51.120Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-64191",
      "date": "2026-07-22",
      "epss": "0.00169",
      "percentile": "0.06586"
    },
    "microsoft_vex": {
      "current_release_date": "2026-07-22T01:02:16.000Z",
      "cve": "CVE-2026-64191",
      "id": "msrc_CVE-2026-64191",
      "initial_release_date": "2026-07-22T01:02:16.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "i2c: stub: Reject I2C block transfers with invalid length",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-64191.json",
      "version": "1"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64191\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-20T17:18:22.217\",\"lastModified\":\"2026-07-20T17:18:22.217\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ni2c: stub: Reject I2C block transfers with invalid length\\n\\nThe I2C_SMBUS_I2C_BLOCK_DATA case in stub_xfer() uses data-\u003eblock[0]\\nas the transfer length. The existing check only clamps it to avoid\\noverrunning the chip-\u003ewords[256] register array, but does not validate\\nit against I2C_SMBUS_BLOCK_MAX (32), which is the limit of the union\\ni2c_smbus_data.block buffer (34 bytes total). The driver is a\\ndevelopment/test tool (CONFIG_I2C_STUB=m, not built by default)\\nthat must be loaded with a chip_addr= parameter.\\n\\nA local user with access to /dev/i2c-* can issue an I2C_SMBUS ioctl\\nwith I2C_SMBUS_I2C_BLOCK_DATA and data-\u003eblock[0] \u003e 32, causing\\nstub_xfer() to read or write past the end of the union\\ni2c_smbus_data.block buffer:\\n\\n BUG: KASAN: stack-out-of-bounds in stub_xfer (drivers/i2c/i2c-stub.c:223)\\n Read of size 1 at addr ffff88800abcfd92 by task exploit/81\\n Call Trace:\\n  \u003cTASK\u003e\\n  stub_xfer (drivers/i2c/i2c-stub.c:223)\\n  __i2c_smbus_xfer (drivers/i2c/i2c-core-smbus.c:593)\\n  i2c_smbus_xfer (drivers/i2c/i2c-core-smbus.c:536)\\n  i2cdev_ioctl_smbus (drivers/i2c/i2c-dev.c:391)\\n  i2cdev_ioctl (drivers/i2c/i2c-dev.c:478)\\n  __x64_sys_ioctl (fs/ioctl.c:583)\\n  do_syscall_64 (arch/x86/entry/syscall_64.c:94)\\n  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\\n  \u003c/TASK\u003e\\n\\nThe bug exists because i2c-stub implements .smbus_xfer directly,\\nbypassing the I2C_SMBUS_BLOCK_MAX validation in\\ni2c_smbus_xfer_emulated(). The I2C_SMBUS_BLOCK_DATA case in the same\\nfunction correctly validates against I2C_SMBUS_BLOCK_MAX, but the\\nI2C_SMBUS_I2C_BLOCK_DATA case does not.\\n\\nFix by rejecting transfers with data-\u003eblock[0] == 0 or\\ndata-\u003eblock[0] \u003e I2C_SMBUS_BLOCK_MAX with -EINVAL, consistent with\\nboth the I2C_SMBUS_BLOCK_DATA case in the same function and the\\nI2C_SMBUS_I2C_BLOCK_DATA validation in i2c_smbus_xfer_emulated().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/i2c/i2c-stub.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4710317891e4824ce1510a6b5066abbd3e917750\",\"lessThan\":\"7e9072dbd5f2f17934751873450d2c22080ead80\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4710317891e4824ce1510a6b5066abbd3e917750\",\"lessThan\":\"21e87f336ac6303fed54a69b1d0d79a23b25c8d0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4710317891e4824ce1510a6b5066abbd3e917750\",\"lessThan\":\"3fd225f3e4cd67ec8ddab1afed9da03c7c43537c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4710317891e4824ce1510a6b5066abbd3e917750\",\"lessThan\":\"1c4ffe6b4f04365485ed58d64c9bb86b46fc9037\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4710317891e4824ce1510a6b5066abbd3e917750\",\"lessThan\":\"4bd8635f28c135a08aac6badcd7d9b5cdb34335f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4710317891e4824ce1510a6b5066abbd3e917750\",\"lessThan\":\"5f4d2bd028ebb6e4c09a9d64842546022321d4a7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4710317891e4824ce1510a6b5066abbd3e917750\",\"lessThan\":\"0526931b16e5a118d367b7bfce7d797e63f7ac69\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4710317891e4824ce1510a6b5066abbd3e917750\",\"lessThan\":\"6036b5067a8199ba7a2dc7b377d4b9dd276d5f9e\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/i2c/i2c-stub.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.33\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.33\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.260\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.211\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.177\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.144\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.95\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.37\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.14\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0526931b16e5a118d367b7bfce7d797e63f7ac69\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1c4ffe6b4f04365485ed58d64c9bb86b46fc9037\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/21e87f336ac6303fed54a69b1d0d79a23b25c8d0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3fd225f3e4cd67ec8ddab1afed9da03c7c43537c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4bd8635f28c135a08aac6badcd7d9b5cdb34335f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5f4d2bd028ebb6e4c09a9d64842546022321d4a7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6036b5067a8199ba7a2dc7b377d4b9dd276d5f9e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7e9072dbd5f2f17934751873450d2c22080ead80\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-07-21T10:17:08+00:00",
      "cve": "CVE-2026-64191",
      "id": "CVE-2026-64191",
      "initial_release_date": "2026-07-20T00:00:00+00:00",
      "product_status:known_affected": "260",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: i2c: stub: Reject I2C block transfers with invalid length",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64191.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-21T12:58:02Z",
      "cve": "CVE-2026-64191",
      "id": "CVE-2026-64191",
      "initial_release_date": "2026-07-21T12:58:02Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64191",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64191.json",
      "version": "2"
    }
  }
}



Log in or create an account to share your comment.




Tags
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.