{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-40106",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T07:20:57.166Z",
        "datePublished": "2025-10-31T09:41:46.740Z",
        "dateUpdated": "2026-05-11T21:42:37.892Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:42:37.892Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: fix divide-by-zero in comedi_buf_munge()\n\nThe comedi_buf_munge() function performs a modulo operation\n`async->munge_chan %= async->cmd.chanlist_len` without first\nchecking if chanlist_len is zero. If a user program submits a command with\nchanlist_len set to zero, this causes a divide-by-zero error when the device\nprocesses data in the interrupt handler path.\n\nAdd a check for zero chanlist_len at the beginning of the\nfunction, similar to the existing checks for !map and\nCMDF_RAWDATA flag. When chanlist_len is zero, update\nmunge_count and return early, indicating the data was\nhandled without munging.\n\nThis prevents potential kernel panics from malformed user commands."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/comedi/comedi_buf.c"
                    ],
                    "versions": [
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                            "version": "ed9eccbe8970f6eedc1b978c157caf1251a896d4",
                            "lessThan": "4ffea48c69cb2b96a281cb7e5e42d706996631db",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ed9eccbe8970f6eedc1b978c157caf1251a896d4",
                            "lessThan": "8f3e4cd9be4b47246ea73ce5e3e0fa2f57f0d10c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ed9eccbe8970f6eedc1b978c157caf1251a896d4",
                            "lessThan": "2670932f2465793fea1ef073e40883e8390fa4d9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ed9eccbe8970f6eedc1b978c157caf1251a896d4",
                            "lessThan": "6db19822512396be1a3e1e20c16c97270285ba1a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ed9eccbe8970f6eedc1b978c157caf1251a896d4",
                            "lessThan": "d4854eff25efb06d0d84c13e7129bbdba4125f8c",
                            "status": "affected",
                            "versionType": "git"
                        },
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                            "lessThan": "a4bb5d1bc2f238461bcbe5303eb500466690bb2c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ed9eccbe8970f6eedc1b978c157caf1251a896d4",
                            "lessThan": "55520f65fd447e04099a2c44185453c18ea73b7e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ed9eccbe8970f6eedc1b978c157caf1251a896d4",
                            "lessThan": "87b318ba81dda2ee7b603f4f6c55e78ec3e95974",
                            "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/comedi_buf.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.29",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.29",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.301",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.246",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.196",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.158",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.115",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.56",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17.6",
                            "lessThanOrEqual": "6.17.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.29",
                                    "versionEndExcluding": "5.4.301"
                                },
                                {
                                    "vulnerable": true,
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                                    "versionStartIncluding": "2.6.29",
                                    "versionEndExcluding": "6.18"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/4ffea48c69cb2b96a281cb7e5e42d706996631db"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8f3e4cd9be4b47246ea73ce5e3e0fa2f57f0d10c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2670932f2465793fea1ef073e40883e8390fa4d9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6db19822512396be1a3e1e20c16c97270285ba1a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d4854eff25efb06d0d84c13e7129bbdba4125f8c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a4bb5d1bc2f238461bcbe5303eb500466690bb2c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/55520f65fd447e04099a2c44185453c18ea73b7e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/87b318ba81dda2ee7b603f4f6c55e78ec3e95974"
                }
            ],
            "title": "comedi: fix divide-by-zero in comedi_buf_munge()",
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}