CVE-2026-46192 (GCVE-0-2026-46192)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-05-28 09:36
VLAI
Title
spi: microchip-core-qspi: don't attempt to transmit during emulated read-only dual/quad operations
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8f9cf02c8852837923f1cdacfcc92e138513325c , < ec9d0ddbde6003c303fa5e1d5cd48952852984d8 (git)
Affected: 8f9cf02c8852837923f1cdacfcc92e138513325c , < 67184f361ab4d9fac6d2b8d5fed6649d496038a4 (git)
Affected: 8f9cf02c8852837923f1cdacfcc92e138513325c , < eb56deaabf127e8985fc91fa6c97bf8a3b062844 (git)
Create a notification for this product.
Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.18.30 , ≤ 6.18.* (semver)
Unaffected: 7.0.7 , ≤ 7.0.* (semver)
Unaffected: 7.1-rc3 , ≤ * (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/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-rc3",
              "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-rc3",
                  "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": "2026-05-28T09:36:45.770Z",
        "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": "2026-05-28T09:36:45.770Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-46192",
      "date": "2026-05-29",
      "epss": "0.00017",
      "percentile": "0.04336"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-46192\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-28T10:16:34.837\",\"lastModified\":\"2026-05-28T13:44:01.663\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/67184f361ab4d9fac6d2b8d5fed6649d496038a4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/eb56deaabf127e8985fc91fa6c97bf8a3b062844\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ec9d0ddbde6003c303fa5e1d5cd48952852984d8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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.