{"api_version":"1","generated_at":"2026-04-23T04:08:48+00:00","cve":"CVE-2020-28941","urls":{"html":"https://cve.report/CVE-2020-28941","api":"https://cve.report/api/cve/CVE-2020-28941.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-28941","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-28941"},"summary":{"title":"CVE-2020-28941","description":"An issue was discovered in drivers/accessibility/speakup/spk_ttyio.c in the Linux kernel through 5.9.9. Local attackers on systems with the speakup driver could cause a local denial of service attack, aka CID-d41227544427. This occurs because of an invalid free when the line discipline is used more than once.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2020-11-19 19:15:00","updated_at":"2023-11-07 03:21:00"},"problem_types":["CWE-763"],"metrics":[],"references":[{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZF4OGZPKTAJJXWHPIFP3LHEWWEMR5LPT/","name":"FEDORA-2020-4700a73bd5","refsource":"FEDORA","tags":["Third Party Advisory"],"title":"[SECURITY] Fedora 32 Update: kernel-5.9.10-100.fc32 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d4122754442799187d5d537a9c039a49a67e57f1","name":"https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d4122754442799187d5d537a9c039a49a67e57f1","refsource":"MISC","tags":["Patch","Vendor Advisory"],"title":"kernel/git/torvalds/linux.git - Linux kernel source tree","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.openwall.com/lists/oss-security/2020/11/19/5","name":"[oss-security] 20201119 Re: Linux kernel NULL-ptr deref bug in spk_ttyio_ldisc_close","refsource":"MLIST","tags":["Mailing List","Patch","Third Party Advisory"],"title":"oss-security - Re: Linux kernel NULL-ptr deref bug in\n spk_ttyio_ldisc_close","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TITJQPYDWZ4NB2ONJWUXW75KSQIPF35T/","name":"FEDORA-2020-8c15928d23","refsource":"","tags":[],"title":"[SECURITY] Fedora 33 Update: kernel-5.9.10-200.fc33 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/torvalds/linux/commit/d4122754442799187d5d537a9c039a49a67e57f1","name":"https://github.com/torvalds/linux/commit/d4122754442799187d5d537a9c039a49a67e57f1","refsource":"MISC","tags":["Patch","Third Party Advisory"],"title":"speakup: Do not let the line discipline be used several times · torvalds/linux@d412275 · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZF4OGZPKTAJJXWHPIFP3LHEWWEMR5LPT/","name":"FEDORA-2020-4700a73bd5","refsource":"","tags":[],"title":"[SECURITY] Fedora 32 Update: kernel-5.9.10-100.fc32 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git/commit/?h=tty-linus&id=d4122754442799187d5d537a9c039a49a67e57f1","name":"https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git/commit/?h=tty-linus&id=d4122754442799187d5d537a9c039a49a67e57f1","refsource":"MISC","tags":["Patch","Vendor Advisory"],"title":"kernel/git/gregkh/tty.git - TTY/Serial driver development tree","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.openwall.com/lists/oss-security/2020/11/19/3","name":"https://www.openwall.com/lists/oss-security/2020/11/19/3","refsource":"MISC","tags":["Mailing List","Patch","Third Party Advisory"],"title":"oss-security - Linux kernel NULL-ptr deref bug in spk_ttyio_ldisc_close","mime":"text/x-c","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TITJQPYDWZ4NB2ONJWUXW75KSQIPF35T/","name":"FEDORA-2020-8c15928d23","refsource":"FEDORA","tags":["Third Party Advisory"],"title":"[SECURITY] Fedora 33 Update: kernel-5.9.10-200.fc33 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html","name":"[debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update","refsource":"MLIST","tags":[],"title":"[SECURITY] [DLA 2483-1] linux-4.19 security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-28941","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-28941","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2020","cve_id":"28941","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"9.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"28941","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"32","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"28941","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"33","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"28941","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"32","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"28941","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"33","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"28941","vulnerable":"1","versionEndIncluding":"5.9.9","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2020-28941","qid":"750376","title":"OpenSUSE Security Update for RT kernel (openSUSE-SU-2021:0242-1)"},{"cve":"CVE-2020-28941","qid":"750488","title":"OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2020:2260-1)"},{"cve":"CVE-2020-28941","qid":"750518","title":"OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2020:2161-1)"},{"cve":"CVE-2020-28941","qid":"900040","title":"CBL-Mariner Linux Security Update for kernel 5.4.91"},{"cve":"CVE-2020-28941","qid":"903658","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (3632)"},{"cve":"CVE-2020-28941","qid":"905877","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (3632-1)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2020-28941","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"An issue was discovered in drivers/accessibility/speakup/spk_ttyio.c in the Linux kernel through 5.9.9. Local attackers on systems with the speakup driver could cause a local denial of service attack, aka CID-d41227544427. This occurs because of an invalid free when the line discipline is used more than once."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git/commit/?h=tty-linus&id=d4122754442799187d5d537a9c039a49a67e57f1","refsource":"MISC","name":"https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git/commit/?h=tty-linus&id=d4122754442799187d5d537a9c039a49a67e57f1"},{"url":"https://www.openwall.com/lists/oss-security/2020/11/19/3","refsource":"MISC","name":"https://www.openwall.com/lists/oss-security/2020/11/19/3"},{"url":"https://github.com/torvalds/linux/commit/d4122754442799187d5d537a9c039a49a67e57f1","refsource":"MISC","name":"https://github.com/torvalds/linux/commit/d4122754442799187d5d537a9c039a49a67e57f1"},{"url":"https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d4122754442799187d5d537a9c039a49a67e57f1","refsource":"MISC","name":"https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d4122754442799187d5d537a9c039a49a67e57f1"},{"refsource":"MLIST","name":"[oss-security] 20201119 Re: Linux kernel NULL-ptr deref bug in spk_ttyio_ldisc_close","url":"http://www.openwall.com/lists/oss-security/2020/11/19/5"},{"refsource":"FEDORA","name":"FEDORA-2020-4700a73bd5","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZF4OGZPKTAJJXWHPIFP3LHEWWEMR5LPT/"},{"refsource":"FEDORA","name":"FEDORA-2020-8c15928d23","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TITJQPYDWZ4NB2ONJWUXW75KSQIPF35T/"},{"refsource":"MLIST","name":"[debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update","url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html"}]}},"nvd":{"publishedDate":"2020-11-19 19:15:00","lastModifiedDate":"2023-11-07 03:21:00","problem_types":["CWE-763"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM"},"exploitabilityScore":1.8,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:N/I:N/A:C","accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"COMPLETE","baseScore":4.9},"severity":"MEDIUM","exploitabilityScore":3.9,"impactScore":6.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndIncluding":"5.9.9","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2020","CveId":"28941","Ordinal":"192004","Title":"CVE-2020-28941","CVE":"CVE-2020-28941","Year":"2020"},"notes":[{"CveYear":"2020","CveId":"28941","Ordinal":"1","NoteData":"An issue was discovered in drivers/accessibility/speakup/spk_ttyio.c in the Linux kernel through 5.9.9. Local attackers on systems with the speakup driver could cause a local denial of service attack, aka CID-d41227544427. This occurs because of an invalid free when the line discipline is used more than once.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"28941","Ordinal":"2","NoteData":"2020-11-19","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"28941","Ordinal":"3","NoteData":"2020-12-10","Type":"Other","Title":"Modified"}]}}}