{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-31749",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-03-09T15:48:24.139Z",
        "datePublished": "2026-05-01T14:14:42.227Z",
        "dateUpdated": "2026-05-11T22:15:02.951Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T22:15:02.951Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: ni_atmio16d: Fix invalid clean-up after failed attach\n\nIf the driver's COMEDI \"attach\" handler function (`atmio16d_attach()`)\nreturns an error, the COMEDI core will call the driver's \"detach\"\nhandler function (`atmio16d_detach()`) to clean up.  This calls\n`reset_atmio16d()` unconditionally, but depending on where the error\noccurred in the attach handler, the device may not have been\nsufficiently initialized to call `reset_atmio16d()`.  It uses\n`dev->iobase` as the I/O port base address and `dev->private` as the\npointer to the COMEDI device's private data structure.  `dev->iobase`\nmay still be set to its initial value of 0, which would result in\nundesired writes to low I/O port addresses.  `dev->private` may still be\n`NULL`, which would result in null pointer dereferences.\n\nFix `atmio16d_detach()` by checking that `dev->private` is valid\n(non-null) before calling `reset_atmio16d()`.  This implies that\n`dev->iobase` was set correctly since that is set up before\n`dev->private`."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/comedi/drivers/ni_atmio16d.c"
                    ],
                    "versions": [
                        {
                            "version": "2323b276308a5da5774b778f39c7fd94b2a3022a",
                            "lessThan": "a01dd339ea6ac58b0967a50085622a6017351140",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2323b276308a5da5774b778f39c7fd94b2a3022a",
                            "lessThan": "933a2d6a95f9bfb203e562c9be1dd990c735535c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2323b276308a5da5774b778f39c7fd94b2a3022a",
                            "lessThan": "5d8d88c8c0eec230de8f1f60e0920a4337939a88",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2323b276308a5da5774b778f39c7fd94b2a3022a",
                            "lessThan": "f517646e008fe99ca1800601cd011b110f8684ae",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2323b276308a5da5774b778f39c7fd94b2a3022a",
                            "lessThan": "3848ae00b1642e2c98ff8cbfd2d3b38c6f53b5c3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2323b276308a5da5774b778f39c7fd94b2a3022a",
                            "lessThan": "43c68a2c7cc35b7c2a83c285cb4ad3d472b8caa2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2323b276308a5da5774b778f39c7fd94b2a3022a",
                            "lessThan": "d07d97ca4f7fac467cdcf4a012690853958b7e89",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2323b276308a5da5774b778f39c7fd94b2a3022a",
                            "lessThan": "101ab946b79ad83b36d5cfd47de587492a80acf0",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/comedi/drivers/ni_atmio16d.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.30",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.30",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.253",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.203",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.168",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.134",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.81",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.22",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.12",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "2.6.30",
                                    "versionEndExcluding": "5.10.253"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.30",
                                    "versionEndExcluding": "5.15.203"
                                },
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                                    "versionStartIncluding": "2.6.30",
                                    "versionEndExcluding": "7.0"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/a01dd339ea6ac58b0967a50085622a6017351140"
                },
                {
                    "url": "https://git.kernel.org/stable/c/933a2d6a95f9bfb203e562c9be1dd990c735535c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5d8d88c8c0eec230de8f1f60e0920a4337939a88"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f517646e008fe99ca1800601cd011b110f8684ae"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3848ae00b1642e2c98ff8cbfd2d3b38c6f53b5c3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/43c68a2c7cc35b7c2a83c285cb4ad3d472b8caa2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d07d97ca4f7fac467cdcf4a012690853958b7e89"
                },
                {
                    "url": "https://git.kernel.org/stable/c/101ab946b79ad83b36d5cfd47de587492a80acf0"
                }
            ],
            "title": "comedi: ni_atmio16d: Fix invalid clean-up after failed attach",
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}