{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-93053",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-17T15:57:05.658Z",
        "datePublished": "2026-09-17T16:10:42.397Z",
        "dateUpdated": "2026-10-19T09:04:48.197Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:04:48.197Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspeakup: keyhelp: guard letter_offsets possible out-of-range indexing\n\nhelp_init() builds letter_offsets[] by using the first byte of each\nfunction name as an index via `(start & 31) - 1`. If function_names are\noverridden from sysfs (root) with a name starting outside [a–z], the\nindex underflows or exceeds the array, leading to OOB write.\n\nFunction names can be overridden with the following commands as root:\n\n    modprobe speakup_soft\n    echo \"0 _bad\" > /sys/accessibility/speakup/i18n/function_names\n    # then press Insert+2 on /dev/tty\n\nThis fix checks the first letter in help_init(), and if it is not in the\n[a–z] range the function returns an error to the caller. Eventually this\nerror is propagated to drivers/accessibility/speakup/main.c:2217, which\ncauses a bleep sound."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/accessibility/speakup/keyhelp.c"
                    ],
                    "versions": [
                        {
                            "version": "c6e3fd22cd538365bfeb82997d5b89562e077d42",
                            "lessThan": "fd339b9ef0accb2c24a5285df842552ebf5eb146",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c6e3fd22cd538365bfeb82997d5b89562e077d42",
                            "lessThan": "900cd6e5ef46bd15153762fb26bb03f874fccc52",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c6e3fd22cd538365bfeb82997d5b89562e077d42",
                            "lessThan": "6b39969c724d39b6062efa354dc2d38442bfd021",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c6e3fd22cd538365bfeb82997d5b89562e077d42",
                            "lessThan": "2e91ab73f9beb659f581e2a6a09f79ace1140905",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c6e3fd22cd538365bfeb82997d5b89562e077d42",
                            "lessThan": "d7deb90c4cd086cb111f0ecc9da021218fbde1b0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c6e3fd22cd538365bfeb82997d5b89562e077d42",
                            "lessThan": "5310334762c3f08f51dc2414344dd47492c07d1d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c6e3fd22cd538365bfeb82997d5b89562e077d42",
                            "lessThan": "ca4489b3e54666a7cac7294e71a3cf64e5e95286",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c6e3fd22cd538365bfeb82997d5b89562e077d42",
                            "lessThan": "6a19ad4d68c95185308cd9e5d169b10a2cf236c8",
                            "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/accessibility/speakup/keyhelp.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.37",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.37",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.270",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.221",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.188",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.110",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.52",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.6",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "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": "2.6.37",
                                    "versionEndExcluding": "5.10.270"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.37",
                                    "versionEndExcluding": "5.15.221"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.37",
                                    "versionEndExcluding": "6.1.188"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.37",
                                    "versionEndExcluding": "6.6.157"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.37",
                                    "versionEndExcluding": "6.12.110"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.37",
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.37",
                                    "versionEndExcluding": "7.2.6"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.37",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/fd339b9ef0accb2c24a5285df842552ebf5eb146"
                },
                {
                    "url": "https://git.kernel.org/stable/c/900cd6e5ef46bd15153762fb26bb03f874fccc52"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6b39969c724d39b6062efa354dc2d38442bfd021"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2e91ab73f9beb659f581e2a6a09f79ace1140905"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d7deb90c4cd086cb111f0ecc9da021218fbde1b0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5310334762c3f08f51dc2414344dd47492c07d1d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ca4489b3e54666a7cac7294e71a3cf64e5e95286"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6a19ad4d68c95185308cd9e5d169b10a2cf236c8"
                }
            ],
            "title": "speakup: keyhelp: guard letter_offsets possible out-of-range indexing",
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}