CVE-2026-93053

{"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\u2013z], 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\u2013z] 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"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "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", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"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", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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\u2013z], 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\u2013z] 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."}], "id": "CVE-2026-93053", "lastModified": "2026-10-19T10:16:55.117", "metrics": {}, "published": "2026-09-17T17:17:58.783", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2e91ab73f9beb659f581e2a6a09f79ace1140905"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5310334762c3f08f51dc2414344dd47492c07d1d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6a19ad4d68c95185308cd9e5d169b10a2cf236c8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6b39969c724d39b6062efa354dc2d38442bfd021"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/900cd6e5ef46bd15153762fb26bb03f874fccc52"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ca4489b3e54666a7cac7294e71a3cf64e5e95286"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d7deb90c4cd086cb111f0ecc9da021218fbde1b0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fd339b9ef0accb2c24a5285df842552ebf5eb146"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c6e3fd22cd538365bfeb82997d5b89562e077d42,fd339b9ef0accb2c24a5285df842552ebf5eb146)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c6e3fd22cd538365bfeb82997d5b89562e077d42,900cd6e5ef46bd15153762fb26bb03f874fccc52)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c6e3fd22cd538365bfeb82997d5b89562e077d42,6b39969c724d39b6062efa354dc2d38442bfd021)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c6e3fd22cd538365bfeb82997d5b89562e077d42,2e91ab73f9beb659f581e2a6a09f79ace1140905)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c6e3fd22cd538365bfeb82997d5b89562e077d42,d7deb90c4cd086cb111f0ecc9da021218fbde1b0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c6e3fd22cd538365bfeb82997d5b89562e077d42,5310334762c3f08f51dc2414344dd47492c07d1d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c6e3fd22cd538365bfeb82997d5b89562e077d42,ca4489b3e54666a7cac7294e71a3cf64e5e95286)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c6e3fd22cd538365bfeb82997d5b89562e077d42,6a19ad4d68c95185308cd9e5d169b10a2cf236c8)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.37"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.37)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.270,6.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.221,6.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.188,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,8.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-19T07:00:11.405011+00:00", "updated": "2026-09-19T14:15:17.200968+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-119"]}