{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-38632",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T04:51:24.029Z",
        "datePublished": "2025-08-22T16:00:40.423Z",
        "dateUpdated": "2026-05-23T16:00:13.275Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T16:00:13.275Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npinmux: fix race causing mux_owner NULL with active mux_usecount\n\ncommit 5a3e85c3c397 (\"pinmux: Use sequential access to access\ndesc->pinmux data\") tried to address the issue when two client of the\nsame gpio calls pinctrl_select_state() for the same functionality, was\nresulting in NULL pointer issue while accessing desc->mux_owner.\nHowever, issue was not completely fixed due to the way it was handled\nand it can still result in the same NULL pointer.\n\nThe issue occurs due to the following interleaving:\n\n     cpu0 (process A)                   cpu1 (process B)\n\n      pin_request() {                   pin_free() {\n\n                                         mutex_lock()\n                                         desc->mux_usecount--; //becomes 0\n                                         ..\n                                         mutex_unlock()\n\n  mutex_lock(desc->mux)\n  desc->mux_usecount++; // becomes 1\n  desc->mux_owner = owner;\n  mutex_unlock(desc->mux)\n\n                                         mutex_lock(desc->mux)\n                                         desc->mux_owner = NULL;\n                                         mutex_unlock(desc->mux)\n\nThis sequence leads to a state where the pin appears to be in use\n(`mux_usecount == 1`) but has no owner (`mux_owner == NULL`), which can\ncause NULL pointer on next pin_request on the same pin.\n\nEnsure that updates to mux_usecount and mux_owner are performed\natomically under the same lock. Only clear mux_owner when mux_usecount\nreaches zero and no new owner has been assigned."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/pinctrl/pinmux.c"
                    ],
                    "versions": [
                        {
                            "version": "2da32aed4a97ca1d70fb8b77926f72f30ce5fb4b",
                            "lessThan": "9b2a3e7189028aa7c4d53a84364f2ea9fb209787",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c11e2ec9a780f54982a187ee10ffd1b810715c85",
                            "lessThan": "9ea3f6b9a67be3476e331ce51cac316c2614a564",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5a3e85c3c397c781393ea5fb2f45b1f60f8a4e6e",
                            "lessThan": "b7bd6e3971eb7f0e34d2fdce1b18b08094e0c804",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5a3e85c3c397c781393ea5fb2f45b1f60f8a4e6e",
                            "lessThan": "22b585cbd67d14df3b91529d1b990661c300faa9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5a3e85c3c397c781393ea5fb2f45b1f60f8a4e6e",
                            "lessThan": "0b075c011032f88d1cfde3b45d6dcf08b44140eb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.6.66",
                            "lessThan": "6.6.102",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.5",
                            "lessThan": "6.12.42",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/pinctrl/pinmux.c"
                    ],
                    "versions": [
                        {
                            "version": "6.13",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.13",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.102",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.42",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.15.10",
                            "lessThanOrEqual": "6.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.16.1",
                            "lessThanOrEqual": "6.16.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6.66",
                                    "versionEndExcluding": "6.6.102"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.12.5",
                                    "versionEndExcluding": "6.12.42"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.13",
                                    "versionEndExcluding": "6.15.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.13",
                                    "versionEndExcluding": "6.16.1"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.13",
                                    "versionEndExcluding": "6.17"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/9b2a3e7189028aa7c4d53a84364f2ea9fb209787"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9ea3f6b9a67be3476e331ce51cac316c2614a564"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b7bd6e3971eb7f0e34d2fdce1b18b08094e0c804"
                },
                {
                    "url": "https://git.kernel.org/stable/c/22b585cbd67d14df3b91529d1b990661c300faa9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0b075c011032f88d1cfde3b45d6dcf08b44140eb"
                }
            ],
            "title": "pinmux: fix race causing mux_owner NULL with active mux_usecount",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}