{"api_version":"1","generated_at":"2026-04-22T23:21:38+00:00","cve":"CVE-2020-36557","urls":{"html":"https://cve.report/CVE-2020-36557","api":"https://cve.report/api/cve/CVE-2020-36557.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-36557","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-36557"},"summary":{"title":"CVE-2020-36557","description":"A race condition in the Linux kernel before 5.6.2 between the VT_DISALLOCATE ioctl and closing/opening of ttys could lead to a use-after-free.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2022-07-21 04:15:00","updated_at":"2022-07-27 19:24:00"},"problem_types":["CWE-362","CWE-416"],"metrics":[],"references":[{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.2","name":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.2","refsource":"MISC","tags":[],"title":"","mime":"text/x-c","httpstatus":"200","archivestatus":"200"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ca4463bf8438b403596edd0ec961ca0d4fbe0220","name":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ca4463bf8438b403596edd0ec961ca0d4fbe0220","refsource":"MISC","tags":[],"title":"kernel/git/torvalds/linux.git - Linux kernel source tree","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-36557","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-36557","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2020","cve_id":"36557","vulnerable":"1","versionEndIncluding":"","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-2020-36557","qid":"160076","title":"Oracle Enterprise Linux Security Update for unbreakable enterprise kernel (ELSA-2022-9761)"},{"cve":"CVE-2020-36557","qid":"390267","title":"Oracle VM Server for x86 Security Update for kernel (OVMSA-2022-0024)"},{"cve":"CVE-2020-36557","qid":"672205","title":"EulerOS Security Update for kernel (EulerOS-SA-2022-2466)"},{"cve":"CVE-2020-36557","qid":"672278","title":"EulerOS Security Update for kernel (EulerOS-SA-2022-2686)"},{"cve":"CVE-2020-36557","qid":"672324","title":"EulerOS Security Update for kernel (EulerOS-SA-2022-2712)"},{"cve":"CVE-2020-36557","qid":"752452","title":"SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:2719-1)"},{"cve":"CVE-2020-36557","qid":"752453","title":"SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:2723-1)"},{"cve":"CVE-2020-36557","qid":"752455","title":"SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:2720-1)"},{"cve":"CVE-2020-36557","qid":"752463","title":"SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:2809-1)"},{"cve":"CVE-2020-36557","qid":"752474","title":"SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:2827-1)"},{"cve":"CVE-2020-36557","qid":"752502","title":"SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:2875-1)"},{"cve":"CVE-2020-36557","qid":"752591","title":"SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:3274-1)"},{"cve":"CVE-2020-36557","qid":"752831","title":"SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 31 for SLE 15) (SUSE-SU-2022:4027-1)"},{"cve":"CVE-2020-36557","qid":"752902","title":"SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 30 for SLE 15) (SUSE-SU-2022:4129-1)"},{"cve":"CVE-2020-36557","qid":"753156","title":"SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:2741-1)"},{"cve":"CVE-2020-36557","qid":"753316","title":"SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:2892-1)"},{"cve":"CVE-2020-36557","qid":"753703","title":"SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:0416-1)"},{"cve":"CVE-2020-36557","qid":"753707","title":"SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:0416-1)"},{"cve":"CVE-2020-36557","qid":"753727","title":"SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:0416-1)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2020-36557","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":"A race condition in the Linux kernel before 5.6.2 between the VT_DISALLOCATE ioctl and closing/opening of ttys could lead to a use-after-free."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ca4463bf8438b403596edd0ec961ca0d4fbe0220","refsource":"MISC","name":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ca4463bf8438b403596edd0ec961ca0d4fbe0220"},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.2","refsource":"MISC","name":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.2"}]}},"nvd":{"publishedDate":"2022-07-21 04:15:00","lastModifiedDate":"2022-07-27 19:24:00","problem_types":["CWE-362","CWE-416"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":5.1,"baseSeverity":"MEDIUM"},"exploitabilityScore":1.4,"impactScore":3.6}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.6.2","cpe_name":[]}]}]}},"legacy_mitre":{"record":null,"notes":[]}}}