{"id":"CVE-2026-93053","revision":"4adfd985fef34e37baa2e086d8a5ced6","records":[{"revision":"4adfd985fef34e37baa2e086d8a5ced6","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93053","aliases":[],"title":"speakup: keyhelp: guard letter_offsets possible out-of-range indexing","description":"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.","state":0,"publishedAt":"2026-09-17T16:10:42.397+00:00","modifiedAt":"2026-10-19T09:04:48.197+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/accessibility/speakup/keyhelp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"c6e3fd22cd538365bfeb82997d5b89562e077d42\",\n                            \"lessThan\": \"fd339b9ef0accb2c24a5285df842552ebf5eb146\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c6e3fd22cd538365bfeb82997d5b89562e077d42\",\n                            \"lessThan\": \"900cd6e5ef46bd15153762fb26bb03f874fccc52\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c6e3fd22cd538365bfeb82997d5b89562e077d42\",\n                            \"lessThan\": \"6b39969c724d39b6062efa354dc2d38442bfd021\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c6e3fd22cd538365bfeb82997d5b89562e077d42\",\n                            \"lessThan\": \"2e91ab73f9beb659f581e2a6a09f79ace1140905\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c6e3fd22cd538365bfeb82997d5b89562e077d42\",\n                            \"lessThan\": \"d7deb90c4cd086cb111f0ecc9da021218fbde1b0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c6e3fd22cd538365bfeb82997d5b89562e077d42\",\n                            \"lessThan\": \"5310334762c3f08f51dc2414344dd47492c07d1d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c6e3fd22cd538365bfeb82997d5b89562e077d42\",\n                            \"lessThan\": \"ca4489b3e54666a7cac7294e71a3cf64e5e95286\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c6e3fd22cd538365bfeb82997d5b89562e077d42\",\n                            \"lessThan\": \"6a19ad4d68c95185308cd9e5d169b10a2cf236c8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/accessibility/speakup/keyhelp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.37\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.37\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/fd339b9ef0accb2c24a5285df842552ebf5eb146","https://git.kernel.org/stable/c/900cd6e5ef46bd15153762fb26bb03f874fccc52","https://git.kernel.org/stable/c/6b39969c724d39b6062efa354dc2d38442bfd021","https://git.kernel.org/stable/c/2e91ab73f9beb659f581e2a6a09f79ace1140905","https://git.kernel.org/stable/c/d7deb90c4cd086cb111f0ecc9da021218fbde1b0","https://git.kernel.org/stable/c/5310334762c3f08f51dc2414344dd47492c07d1d","https://git.kernel.org/stable/c/ca4489b3e54666a7cac7294e71a3cf64e5e95286","https://git.kernel.org/stable/c/6a19ad4d68c95185308cd9e5d169b10a2cf236c8"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93053","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93053","identifiers":["CVE-2026-93053"]},"retained":false,"historicalAffected":[]}],"coverage":[]}