{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "bfc6444b57dc7186b6acc964705d7516cbaf3904"
            },
            {
              "fixed": "e6a2f5f845f50b0c4299bace5111f56d3390a090"
            },
            {
              "fixed": "9dc325327babe7f159e84cbe9380a45342da0585"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "58a5c93bd1a6e949267400080f07e57ffe05ec34"
            },
            {
              "last_affected": "e2ecdddca80dd845df42376e4b0197fe97018ba2"
            },
            {
              "last_affected": "de7cffa53149c7b48bd1bb29b02390c9f05b7f41"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.1.101"
            },
            {
              "fixed": "6.2"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.6.42"
            },
            {
              "fixed": "6.7"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.9.11"
            },
            {
              "fixed": "6.10"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.10.0"
            },
            {
              "fixed": "7.1.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74733.json"
  },
  "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": "CVE-2026-74733",
  "modified": "2026-08-27T11:30:24.949757344Z",
  "published": "2026-08-22T15:33:21.579Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9dc325327babe7f159e84cbe9380a45342da0585"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e6a2f5f845f50b0c4299bace5111f56d3390a090"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74733.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74733"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock"
}