{"api_version":"1","generated_at":"2026-07-23T19:17:50+00:00","cve":"CVE-2022-4543","urls":{"html":"https://cve.report/CVE-2022-4543","api":"https://cve.report/api/cve/CVE-2022-4543.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2022-4543","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2022-4543"},"summary":{"title":"CVE-2022-4543","description":"A flaw named \"EntryBleed\" was found in the Linux Kernel Page Table Isolation (KPTI). This issue could allow a local attacker to leak KASLR base via prefetch side-channels based on TLB timing for Intel systems.","state":"PUBLIC","assigner":"secalert@redhat.com","published_at":"2023-01-11 15:15:00","updated_at":"2023-01-19 18:38:00"},"problem_types":["CWE-203"],"metrics":[],"references":[{"url":"https://www.openwall.com/lists/oss-security/2022/12/16/3","name":"https://www.openwall.com/lists/oss-security/2022/12/16/3","refsource":"MISC","tags":[],"title":"oss-security - CVE-2022-4543: KASLR Leakage Achievable even with KPTI through Prefetch Side-Channel","mime":"text/x-c","httpstatus":"200","archivestatus":"200"},{"url":"https://www.willsroot.io/2022/12/entrybleed.html","name":"https://www.willsroot.io/2022/12/entrybleed.html","refsource":"MISC","tags":[],"title":"Will's Root: EntryBleed: Breaking KASLR under KPTI with Prefetch (CVE-2022-4543)","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2022-4543","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-4543","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2022","cve_id":"4543","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-2022-4543","qid":"905246","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (12981)"},{"cve":"CVE-2022-4543","qid":"905251","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (12989)"}]},"source_records":{"cve_program":{"data_version":"4.0","data_type":"CVE","data_format":"MITRE","CVE_data_meta":{"ID":"CVE-2022-4543","ASSIGNER":"secalert@redhat.com","STATE":"PUBLIC"},"description":{"description_data":[{"lang":"eng","value":"A flaw named \"EntryBleed\" was found in the Linux Kernel Page Table Isolation (KPTI). This issue could allow a local attacker to leak KASLR base via prefetch side-channels based on TLB timing for Intel systems."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-200","cweId":"CWE-200"}]}]},"affects":{"vendor":{"vendor_data":[{"vendor_name":"n/a","product":{"product_data":[{"product_name":"Linux kernel","version":{"version_data":[{"version_affected":"=","version_value":"all versions"}]}}]}}]}},"references":{"reference_data":[{"url":"https://www.openwall.com/lists/oss-security/2022/12/16/3","refsource":"MISC","name":"https://www.openwall.com/lists/oss-security/2022/12/16/3"},{"url":"https://www.willsroot.io/2022/12/entrybleed.html","refsource":"MISC","name":"https://www.willsroot.io/2022/12/entrybleed.html"}]}},"nvd":{"publishedDate":"2023-01-11 15:15:00","lastModifiedDate":"2023-01-19 18:38:00","problem_types":["CWE-203"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":5.5,"baseSeverity":"MEDIUM"},"exploitabilityScore":1.8,"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:*:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":null,"notes":[]}}}