CVE-2026-46192 (GCVE-0-2026-46192)
Vulnerability from cvelistv5
Published
2026-05-28 09:36
Modified
2026-06-14 18:01
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: spi: microchip-core-qspi: don't attempt to transmit during emulated read-only dual/quad operations The core will deal with reads by creating clock cycles itself, there's no need to generate clock cycles by transmitting garbage data at the driver level. Further, transmitting garbage data just bricks the transfer since QSPI doesn't have a dedicated master-out line like MOSI in regular SPI. I'm not entirely sure if the transfer is bricked because of the garbage data being transmitted on the bus or because the core loses track of whether it is supposed to be sending or receiving data.
References
Impacted products
Vendor Product Version
Linux Linux Version: 8f9cf02c8852837923f1cdacfcc92e138513325c
Version: 8f9cf02c8852837923f1cdacfcc92e138513325c
Version: 8f9cf02c8852837923f1cdacfcc92e138513325c
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/spi/spi-microchip-core-qspi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ec9d0ddbde6003c303fa5e1d5cd48952852984d8",
              "status": "affected",
              "version": "8f9cf02c8852837923f1cdacfcc92e138513325c",
              "versionType": "git"
            },
            {
              "lessThan": "67184f361ab4d9fac6d2b8d5fed6649d496038a4",
              "status": "affected",
              "version": "8f9cf02c8852837923f1cdacfcc92e138513325c",
              "versionType": "git"
            },
            {
              "lessThan": "eb56deaabf127e8985fc91fa6c97bf8a3b062844",
              "status": "affected",
              "version": "8f9cf02c8852837923f1cdacfcc92e138513325c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/spi/spi-microchip-core-qspi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.30",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.7",
              "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": "6.18.30",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.7",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: microchip-core-qspi: don\u0027t attempt to transmit during emulated read-only dual/quad operations\n\nThe core will deal with reads by creating clock cycles itself, there\u0027s\nno need to generate clock cycles by transmitting garbage data at the\ndriver level. Further, transmitting garbage data just bricks the transfer\nsince QSPI doesn\u0027t have a dedicated master-out line like MOSI in regular\nSPI. I\u0027m not entirely sure if the transfer is bricked because of the\ngarbage data being transmitted on the bus or because the core loses\ntrack of whether it is supposed to be sending or receiving data."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T18:01:35.461Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ec9d0ddbde6003c303fa5e1d5cd48952852984d8"
        },
        {
          "url": "https://git.kernel.org/stable/c/67184f361ab4d9fac6d2b8d5fed6649d496038a4"
        },
        {
          "url": "https://git.kernel.org/stable/c/eb56deaabf127e8985fc91fa6c97bf8a3b062844"
        }
      ],
      "title": "spi: microchip-core-qspi: don\u0027t attempt to transmit during emulated read-only dual/quad operations",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46192",
    "datePublished": "2026-05-28T09:36:45.770Z",
    "dateReserved": "2026-05-13T15:03:33.104Z",
    "dateUpdated": "2026-06-14T18:01:35.461Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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