Vulnerability-Lookup

CVE-2026-74733 (GCVE-0-2026-74733)

Vulnerability from cvelistv5 – Published: 2026-08-22 15:33 – Updated: 2026-08-22 15:33

Title

gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock

Summary

In the Linux kernel, the following vulnerability has been resolved: gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock Locking is disabled in the regmap config as this driver uses its own lock. This means that all calls to regmap functions (read or write) must hold the i2c_lock. The function pca953x_irq_bus_sync_unlock() did not do this, and it was therefore possible that multiple threads could cause an incorrect register to be read/written. A previous patch partly fixed this, but only protected the write to the interrupt mask register, and not the read from the direction register.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/e6a2f5f845f50b0c4…
https://git.kernel.org/stable/c/9dc325327babe7f15…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: bfc6444b57dc7186b6acc964705d7516cbaf3904 , < e6a2f5f845f50b0c4299bace5111f56d3390a090 (git) Affected: bfc6444b57dc7186b6acc964705d7516cbaf3904 , < 9dc325327babe7f159e84cbe9380a45342da0585 (git) Affected: 58a5c93bd1a6e949267400080f07e57ffe05ec34 (git) Affected: e2ecdddca80dd845df42376e4b0197fe97018ba2 (git) Affected: de7cffa53149c7b48bd1bb29b02390c9f05b7f41 (git) Affected: 6.1.101 , < 6.2 (semver) Affected: 6.6.42 , < 6.7 (semver) Affected: 6.9.11 , < 6.10 (semver)	guessed
Linux	Linux	Affected: 6.10 Unaffected: 0 , < 6.10 (semver) Unaffected: 7.1.9 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpio/gpio-pca953x.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e6a2f5f845f50b0c4299bace5111f56d3390a090",
              "status": "affected",
              "version": "bfc6444b57dc7186b6acc964705d7516cbaf3904",
              "versionType": "git"
            },
            {
              "lessThan": "9dc325327babe7f159e84cbe9380a45342da0585",
              "status": "affected",
              "version": "bfc6444b57dc7186b6acc964705d7516cbaf3904",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "58a5c93bd1a6e949267400080f07e57ffe05ec34",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e2ecdddca80dd845df42376e4b0197fe97018ba2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "de7cffa53149c7b48bd1bb29b02390c9f05b7f41",
              "versionType": "git"
            },
            {
              "lessThan": "6.2",
              "status": "affected",
              "version": "6.1.101",
              "versionType": "semver"
            },
            {
              "lessThan": "6.7",
              "status": "affected",
              "version": "6.6.42",
              "versionType": "semver"
            },
            {
              "lessThan": "6.10",
              "status": "affected",
              "version": "6.9.11",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpio/gpio-pca953x.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.9",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.1.101",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.6.42",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.9.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock\n\nLocking is disabled in the regmap config as this driver uses its own\nlock. This means that all calls to regmap functions (read or write) must\nhold the i2c_lock. The function pca953x_irq_bus_sync_unlock() did not do\nthis, and it was therefore possible that multiple threads could cause an\nincorrect register to be read/written.\n\nA previous patch partly fixed this, but only protected the write to the\ninterrupt mask register, and not the read from the direction register."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-22T15:33:21.579Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e6a2f5f845f50b0c4299bace5111f56d3390a090"
        },
        {
          "url": "https://git.kernel.org/stable/c/9dc325327babe7f159e84cbe9380a45342da0585"
        }
      ],
      "title": "gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74733",
    "datePublished": "2026-08-22T15:33:21.579Z",
    "dateReserved": "2026-08-15T05:44:03.930Z",
    "dateUpdated": "2026-08-22T15:33:21.579Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-74733\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-22T16:16:48.463\",\"lastModified\":\"2026-08-22T16:16:48.463\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ngpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock\\n\\nLocking is disabled in the regmap config as this driver uses its own\\nlock. This means that all calls to regmap functions (read or write) must\\nhold the i2c_lock. The function pca953x_irq_bus_sync_unlock() did not do\\nthis, and it was therefore possible that multiple threads could cause an\\nincorrect register to be read/written.\\n\\nA previous patch partly fixed this, but only protected the write to the\\ninterrupt mask register, and not the read from the direction register.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/gpio/gpio-pca953x.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"bfc6444b57dc7186b6acc964705d7516cbaf3904\",\"lessThan\":\"e6a2f5f845f50b0c4299bace5111f56d3390a090\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bfc6444b57dc7186b6acc964705d7516cbaf3904\",\"lessThan\":\"9dc325327babe7f159e84cbe9380a45342da0585\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"58a5c93bd1a6e949267400080f07e57ffe05ec34\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e2ecdddca80dd845df42376e4b0197fe97018ba2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"de7cffa53149c7b48bd1bb29b02390c9f05b7f41\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6.1.101\",\"lessThan\":\"6.2\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.6.42\",\"lessThan\":\"6.7\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.9.11\",\"lessThan\":\"6.10\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/gpio/gpio-pca953x.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.10\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.10\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.9\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/9dc325327babe7f159e84cbe9380a45342da0585\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e6a2f5f845f50b0c4299bace5111f56d3390a090\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

FKIE_CVE-2026-74733

Vulnerability from fkie_nvd - Published: 2026-08-22 16:16 - Updated: 2026-08-22 16:16

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9dc325327babe7f159e84cbe9380a45342da0585
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e6a2f5f845f50b0c4299bace5111f56d3390a090

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpio/gpio-pca953x.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e6a2f5f845f50b0c4299bace5111f56d3390a090",
              "status": "affected",
              "version": "bfc6444b57dc7186b6acc964705d7516cbaf3904",
              "versionType": "git"
            },
            {
              "lessThan": "9dc325327babe7f159e84cbe9380a45342da0585",
              "status": "affected",
              "version": "bfc6444b57dc7186b6acc964705d7516cbaf3904",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "58a5c93bd1a6e949267400080f07e57ffe05ec34",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e2ecdddca80dd845df42376e4b0197fe97018ba2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "de7cffa53149c7b48bd1bb29b02390c9f05b7f41",
              "versionType": "git"
            },
            {
              "lessThan": "6.2",
              "status": "affected",
              "version": "6.1.101",
              "versionType": "semver"
            },
            {
              "lessThan": "6.7",
              "status": "affected",
              "version": "6.6.42",
              "versionType": "semver"
            },
            {
              "lessThan": "6.10",
              "status": "affected",
              "version": "6.9.11",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpio/gpio-pca953x.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock\n\nLocking is disabled in the regmap config as this driver uses its own\nlock. This means that all calls to regmap functions (read or write) must\nhold the i2c_lock. The function pca953x_irq_bus_sync_unlock() did not do\nthis, and it was therefore possible that multiple threads could cause an\nincorrect register to be read/written.\n\nA previous patch partly fixed this, but only protected the write to the\ninterrupt mask register, and not the read from the direction register."
    }
  ],
  "id": "CVE-2026-74733",
  "lastModified": "2026-08-22T16:16:48.463",
  "metrics": {},
  "published": "2026-08-22T16:16:48.463",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9dc325327babe7f159e84cbe9380a45342da0585"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e6a2f5f845f50b0c4299bace5111f56d3390a090"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-P6RQ-QPQH-5F25

Vulnerability from github – Published: 2026-08-22 18:30 – Updated: 2026-08-22 18:30

Details

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

gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock

Locking is disabled in the regmap config as this driver uses its own lock. This means that all calls to regmap functions (read or write) must hold the i2c_lock. The function pca953x_irq_bus_sync_unlock() did not do this, and it was therefore possible that multiple threads could cause an incorrect register to be read/written.

A previous patch partly fixed this, but only protected the write to the interrupt mask register, and not the read from the direction register.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-74733"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-22T16:16:48Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock\n\nLocking is disabled in the regmap config as this driver uses its own\nlock. This means that all calls to regmap functions (read or write) must\nhold the i2c_lock. The function pca953x_irq_bus_sync_unlock() did not do\nthis, and it was therefore possible that multiple threads could cause an\nincorrect register to be read/written.\n\nA previous patch partly fixed this, but only protected the write to the\ninterrupt mask register, and not the read from the direction register.",
  "id": "GHSA-p6rq-qpqh-5f25",
  "modified": "2026-08-22T18:30:30Z",
  "published": "2026-08-22T18:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74733"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9dc325327babe7f159e84cbe9380a45342da0585"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e6a2f5f845f50b0c4299bace5111f56d3390a090"
    }
  ],
  "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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-74733 (GCVE-0-2026-74733)

FKIE_CVE-2026-74733

GHSA-P6RQ-QPQH-5F25

Tags

Sightings

Nomenclature