{"api_version":"1","generated_at":"2026-10-01T19:11:55+00:00","cve":"CVE-2026-93053","urls":{"html":"https://cve.report/CVE-2026-93053","api":"https://cve.report/api/cve/CVE-2026-93053.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93053","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93053"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:58","updated_at":"2026-09-17 17:17:58"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/d7deb90c4cd086cb111f0ecc9da021218fbde1b0","name":"https://git.kernel.org/stable/c/d7deb90c4cd086cb111f0ecc9da021218fbde1b0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6b39969c724d39b6062efa354dc2d38442bfd021","name":"https://git.kernel.org/stable/c/6b39969c724d39b6062efa354dc2d38442bfd021","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fd339b9ef0accb2c24a5285df842552ebf5eb146","name":"https://git.kernel.org/stable/c/fd339b9ef0accb2c24a5285df842552ebf5eb146","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2e91ab73f9beb659f581e2a6a09f79ace1140905","name":"https://git.kernel.org/stable/c/2e91ab73f9beb659f581e2a6a09f79ace1140905","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5310334762c3f08f51dc2414344dd47492c07d1d","name":"https://git.kernel.org/stable/c/5310334762c3f08f51dc2414344dd47492c07d1d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ca4489b3e54666a7cac7294e71a3cf64e5e95286","name":"https://git.kernel.org/stable/c/ca4489b3e54666a7cac7294e71a3cf64e5e95286","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6a19ad4d68c95185308cd9e5d169b10a2cf236c8","name":"https://git.kernel.org/stable/c/6a19ad4d68c95185308cd9e5d169b10a2cf236c8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/900cd6e5ef46bd15153762fb26bb03f874fccc52","name":"https://git.kernel.org/stable/c/900cd6e5ef46bd15153762fb26bb03f874fccc52","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93053","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93053","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c6e3fd22cd538365bfeb82997d5b89562e077d42 fd339b9ef0accb2c24a5285df842552ebf5eb146 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c6e3fd22cd538365bfeb82997d5b89562e077d42 900cd6e5ef46bd15153762fb26bb03f874fccc52 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c6e3fd22cd538365bfeb82997d5b89562e077d42 6b39969c724d39b6062efa354dc2d38442bfd021 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c6e3fd22cd538365bfeb82997d5b89562e077d42 2e91ab73f9beb659f581e2a6a09f79ace1140905 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"93053","cve":"CVE-2026-93053","epss":"0.001760000","percentile":"0.074600000","score_date":"2026-09-18","updated_at":"2026-09-19 00:06:17"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/accessibility/speakup/keyhelp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"fd339b9ef0accb2c24a5285df842552ebf5eb146","status":"affected","version":"c6e3fd22cd538365bfeb82997d5b89562e077d42","versionType":"git"},{"lessThan":"900cd6e5ef46bd15153762fb26bb03f874fccc52","status":"affected","version":"c6e3fd22cd538365bfeb82997d5b89562e077d42","versionType":"git"},{"lessThan":"6b39969c724d39b6062efa354dc2d38442bfd021","status":"affected","version":"c6e3fd22cd538365bfeb82997d5b89562e077d42","versionType":"git"},{"lessThan":"2e91ab73f9beb659f581e2a6a09f79ace1140905","status":"affected","version":"c6e3fd22cd538365bfeb82997d5b89562e077d42","versionType":"git"},{"lessThan":"d7deb90c4cd086cb111f0ecc9da021218fbde1b0","status":"affected","version":"c6e3fd22cd538365bfeb82997d5b89562e077d42","versionType":"git"},{"lessThan":"5310334762c3f08f51dc2414344dd47492c07d1d","status":"affected","version":"c6e3fd22cd538365bfeb82997d5b89562e077d42","versionType":"git"},{"lessThan":"ca4489b3e54666a7cac7294e71a3cf64e5e95286","status":"affected","version":"c6e3fd22cd538365bfeb82997d5b89562e077d42","versionType":"git"},{"lessThan":"6a19ad4d68c95185308cd9e5d169b10a2cf236c8","status":"affected","version":"c6e3fd22cd538365bfeb82997d5b89562e077d42","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/accessibility/speakup/keyhelp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.37"},{"lessThan":"2.6.37","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.270","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"2.6.37","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"2.6.37","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"2.6.37","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"2.6.37","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"2.6.37","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"2.6.37","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"2.6.37","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"2.6.37","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:10:42.397Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-93053","datePublished":"2026-09-17T16:10:42.397Z","dateReserved":"2026-09-17T15:57:05.658Z","dateUpdated":"2026-09-17T16:10:42.397Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:58","lastModifiedDate":"2026-09-17 17:17:58","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93053","Ordinal":"1","Title":"speakup: keyhelp: guard letter_offsets possible out-of-range ind","CVE":"CVE-2026-93053","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93053","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"speakup: keyhelp: guard letter_offsets possible out-of-range ind"}]}}}