Vulnerability-Lookup

CVE-2026-64501 (GCVE-0-2026-64501)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-07-25 08:51

Title

iio: adc: ad_sigma_delta: fix CS held asserted and state leaks

Summary

In the Linux kernel, the following vulnerability has been resolved: iio: adc: ad_sigma_delta: fix CS held asserted and state leaks In ad_sigma_delta_single_conversion(), set_mode(AD_SD_MODE_IDLE) and disable_one() were called from the out: block while keep_cs_asserted was still true. This caused any SPI transfer issued by those callbacks to carry cs_change=1, leaving CS permanently asserted after the conversion. Fix by moving both calls into the out_unlock: block, after keep_cs_asserted is cleared, matching the pattern already used in ad_sd_calibrate(). In the error path of ad_sd_buffer_postenable(), if an operation fails after set_mode(AD_SD_MODE_CONTINUOUS) has already succeeded (e.g. spi_offload_trigger_enable()), the device is left in continuous conversion mode with CS physically asserted. Additionally, bus_locked remaining true after spi_bus_unlock() causes subsequent SPI operations to call spi_sync_locked() without the bus lock actually held, allowing concurrent SPI access. Fix the error path by clearing keep_cs_asserted first, then calling set_mode(AD_SD_MODE_IDLE) to revert the device mode and deassert CS, then clearing bus_locked before releasing the bus. For devices that implement neither set_mode nor disable_one (such as MAX11205, which has no physical CS pin), no SPI transfer is issued during cleanup and the cs_change flag has no effect on any physical line.

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/c313bb7c38855e94c…
https://git.kernel.org/stable/c/f1de829ee87a1198d…
https://git.kernel.org/stable/c/c72da0688575e5ef3…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 132d44dc6966c1cf841ffe0f6f048165687e870b , < c313bb7c38855e94ceef939d152dd75e5a904b5f (git) Affected: 132d44dc6966c1cf841ffe0f6f048165687e870b , < f1de829ee87a1198d3465493ce430d36c5fa029c (git) Affected: 132d44dc6966c1cf841ffe0f6f048165687e870b , < c72da0688575e5ef39c36bb44fed53aa18f8ae65 (git)
Linux	Linux	Affected: 6.14 Unaffected: 0 , < 6.14 (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iio/adc/ad_sigma_delta.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c313bb7c38855e94ceef939d152dd75e5a904b5f",
              "status": "affected",
              "version": "132d44dc6966c1cf841ffe0f6f048165687e870b",
              "versionType": "git"
            },
            {
              "lessThan": "f1de829ee87a1198d3465493ce430d36c5fa029c",
              "status": "affected",
              "version": "132d44dc6966c1cf841ffe0f6f048165687e870b",
              "versionType": "git"
            },
            {
              "lessThan": "c72da0688575e5ef39c36bb44fed53aa18f8ae65",
              "status": "affected",
              "version": "132d44dc6966c1cf841ffe0f6f048165687e870b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iio/adc/ad_sigma_delta.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.39",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.4",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2-rc1",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: adc: ad_sigma_delta: fix CS held asserted and state leaks\n\nIn ad_sigma_delta_single_conversion(), set_mode(AD_SD_MODE_IDLE) and\ndisable_one() were called from the out: block while keep_cs_asserted\nwas still true. This caused any SPI transfer issued by those callbacks\nto carry cs_change=1, leaving CS permanently asserted after the\nconversion. Fix by moving both calls into the out_unlock: block, after\nkeep_cs_asserted is cleared, matching the pattern already used in\nad_sd_calibrate().\n\nIn the error path of ad_sd_buffer_postenable(), if an operation fails\nafter set_mode(AD_SD_MODE_CONTINUOUS) has already succeeded (e.g.\nspi_offload_trigger_enable()), the device is left in continuous\nconversion mode with CS physically asserted. Additionally,\nbus_locked remaining true after spi_bus_unlock() causes subsequent\nSPI operations to call spi_sync_locked() without the bus lock actually\nheld, allowing concurrent SPI access.\n\nFix the error path by clearing keep_cs_asserted first, then calling\nset_mode(AD_SD_MODE_IDLE) to revert the device mode and deassert CS,\nthen clearing bus_locked before releasing the bus.\n\nFor devices that implement neither set_mode nor disable_one (such as\nMAX11205, which has no physical CS pin), no SPI transfer is issued\nduring cleanup and the cs_change flag has no effect on any physical\nline."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T08:51:56.768Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c313bb7c38855e94ceef939d152dd75e5a904b5f"
        },
        {
          "url": "https://git.kernel.org/stable/c/f1de829ee87a1198d3465493ce430d36c5fa029c"
        },
        {
          "url": "https://git.kernel.org/stable/c/c72da0688575e5ef39c36bb44fed53aa18f8ae65"
        }
      ],
      "title": "iio: adc: ad_sigma_delta: fix CS held asserted and state leaks",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64501",
    "datePublished": "2026-07-25T08:51:56.768Z",
    "dateReserved": "2026-07-19T15:36:31.793Z",
    "dateUpdated": "2026-07-25T08:51:56.768Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-64501",
      "date": "2026-07-25",
      "epss": "0.00206",
      "percentile": "0.1086"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64501\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-25T10:17:36.090\",\"lastModified\":\"2026-07-25T10:17:36.090\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\niio: adc: ad_sigma_delta: fix CS held asserted and state leaks\\n\\nIn ad_sigma_delta_single_conversion(), set_mode(AD_SD_MODE_IDLE) and\\ndisable_one() were called from the out: block while keep_cs_asserted\\nwas still true. This caused any SPI transfer issued by those callbacks\\nto carry cs_change=1, leaving CS permanently asserted after the\\nconversion. Fix by moving both calls into the out_unlock: block, after\\nkeep_cs_asserted is cleared, matching the pattern already used in\\nad_sd_calibrate().\\n\\nIn the error path of ad_sd_buffer_postenable(), if an operation fails\\nafter set_mode(AD_SD_MODE_CONTINUOUS) has already succeeded (e.g.\\nspi_offload_trigger_enable()), the device is left in continuous\\nconversion mode with CS physically asserted. Additionally,\\nbus_locked remaining true after spi_bus_unlock() causes subsequent\\nSPI operations to call spi_sync_locked() without the bus lock actually\\nheld, allowing concurrent SPI access.\\n\\nFix the error path by clearing keep_cs_asserted first, then calling\\nset_mode(AD_SD_MODE_IDLE) to revert the device mode and deassert CS,\\nthen clearing bus_locked before releasing the bus.\\n\\nFor devices that implement neither set_mode nor disable_one (such as\\nMAX11205, which has no physical CS pin), no SPI transfer is issued\\nduring cleanup and the cs_change flag has no effect on any physical\\nline.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/iio/adc/ad_sigma_delta.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"132d44dc6966c1cf841ffe0f6f048165687e870b\",\"lessThan\":\"c313bb7c38855e94ceef939d152dd75e5a904b5f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"132d44dc6966c1cf841ffe0f6f048165687e870b\",\"lessThan\":\"f1de829ee87a1198d3465493ce430d36c5fa029c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"132d44dc6966c1cf841ffe0f6f048165687e870b\",\"lessThan\":\"c72da0688575e5ef39c36bb44fed53aa18f8ae65\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/iio/adc/ad_sigma_delta.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.14\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.14\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.39\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/c313bb7c38855e94ceef939d152dd75e5a904b5f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c72da0688575e5ef39c36bb44fed53aa18f8ae65\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f1de829ee87a1198d3465493ce430d36c5fa029c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

GHSA-8J65-CC62-W2HG

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-25 12:31

Details

In the Linux kernel, the following vulnerability has been resolved:

iio: adc: ad_sigma_delta: fix CS held asserted and state leaks

In ad_sigma_delta_single_conversion(), set_mode(AD_SD_MODE_IDLE) and disable_one() were called from the out: block while keep_cs_asserted was still true. This caused any SPI transfer issued by those callbacks to carry cs_change=1, leaving CS permanently asserted after the conversion. Fix by moving both calls into the out_unlock: block, after keep_cs_asserted is cleared, matching the pattern already used in ad_sd_calibrate().

In the error path of ad_sd_buffer_postenable(), if an operation fails after set_mode(AD_SD_MODE_CONTINUOUS) has already succeeded (e.g. spi_offload_trigger_enable()), the device is left in continuous conversion mode with CS physically asserted. Additionally, bus_locked remaining true after spi_bus_unlock() causes subsequent SPI operations to call spi_sync_locked() without the bus lock actually held, allowing concurrent SPI access.

Fix the error path by clearing keep_cs_asserted first, then calling set_mode(AD_SD_MODE_IDLE) to revert the device mode and deassert CS, then clearing bus_locked before releasing the bus.

For devices that implement neither set_mode nor disable_one (such as MAX11205, which has no physical CS pin), no SPI transfer is issued during cleanup and the cs_change flag has no effect on any physical line.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-64501"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:36Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: adc: ad_sigma_delta: fix CS held asserted and state leaks\n\nIn ad_sigma_delta_single_conversion(), set_mode(AD_SD_MODE_IDLE) and\ndisable_one() were called from the out: block while keep_cs_asserted\nwas still true. This caused any SPI transfer issued by those callbacks\nto carry cs_change=1, leaving CS permanently asserted after the\nconversion. Fix by moving both calls into the out_unlock: block, after\nkeep_cs_asserted is cleared, matching the pattern already used in\nad_sd_calibrate().\n\nIn the error path of ad_sd_buffer_postenable(), if an operation fails\nafter set_mode(AD_SD_MODE_CONTINUOUS) has already succeeded (e.g.\nspi_offload_trigger_enable()), the device is left in continuous\nconversion mode with CS physically asserted. Additionally,\nbus_locked remaining true after spi_bus_unlock() causes subsequent\nSPI operations to call spi_sync_locked() without the bus lock actually\nheld, allowing concurrent SPI access.\n\nFix the error path by clearing keep_cs_asserted first, then calling\nset_mode(AD_SD_MODE_IDLE) to revert the device mode and deassert CS,\nthen clearing bus_locked before releasing the bus.\n\nFor devices that implement neither set_mode nor disable_one (such as\nMAX11205, which has no physical CS pin), no SPI transfer is issued\nduring cleanup and the cs_change flag has no effect on any physical\nline.",
  "id": "GHSA-8j65-cc62-w2hg",
  "modified": "2026-07-25T12:31:38Z",
  "published": "2026-07-25T12:31:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64501"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c313bb7c38855e94ceef939d152dd75e5a904b5f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c72da0688575e5ef39c36bb44fed53aa18f8ae65"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f1de829ee87a1198d3465493ce430d36c5fa029c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-64501 (GCVE-0-2026-64501)

GHSA-8J65-CC62-W2HG

Tags

Sightings

Nomenclature