{"id":"CVE-2021-21781","state":"PUBLISHED","title":"An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66 and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A u","description":"An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66 and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A userland application can read the contents of the sigpage, which can leak kernel memory contents. An attacker can read a process’s memory at a specific offset to trigger this vulnerability. This was fixed in kernel releases: 4.14.222 4.19.177 5.4.99 5.10.17 5.11","publishedAt":"2021-08-18T14:37:46.000Z","updatedAt":"2024-08-03T18:23:29.351Z","severity":{"score":4,"label":"Medium","version":"3.0","vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","source":"talos"},"assigner":"talos","products":["n/a Linux Kernel"],"affected":[{"vendor":"n/a","product":"Linux Kernel","versions":[{"version":"Linux Kernel v5.4.54, Linux Kernel v5.4.66","status":"affected"}]}],"references":["https://talosintelligence.com/vulnerability_reports/TALOS-2021-1243","https://www.oracle.com/security-alerts/cpujul2022.html"],"weaknesses":["CWE-908"],"ingestedAt":"2026-10-29T19:47:59.168Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/21xxx/CVE-2021-21781.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-21781","state":"PUBLISHED","datePublished":"2021-08-18T14:37:46.000Z","dateUpdated":"2024-08-03T18:23:29.351Z","assignerShortName":"talos","assignerOrgId":"b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b","dateReserved":"2021-01-04T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66 and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A userland application can read the contents of the sigpage, which can leak kernel memory contents. An attacker can read a process’s memory at a specific offset to trigger this vulnerability. This was fixed in kernel releases: 4.14.222 4.19.177 5.4.99 5.10.17 5.11"}],"affected":[{"vendor":"n/a","product":"Linux Kernel","versions":[{"version":"Linux Kernel v5.4.54, Linux Kernel v5.4.66","status":"affected"}]}],"references":[{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2021-1243","tags":["x_refsource_MISC"]},{"url":"https://www.oracle.com/security-alerts/cpujul2022.html","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_0":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-908","description":"CWE-908: Use of Uninitialized Resource","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"talos","dateUpdated":"2022-07-25T16:24:43.000Z","orgId":"b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"talos-cna@cisco.com","ID":"CVE-2021-21781","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Linux Kernel","version":{"version_data":[{"version_value":"Linux Kernel v5.4.54, Linux Kernel v5.4.66"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66 and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A userland application can read the contents of the sigpage, which can leak kernel memory contents. An attacker can read a process’s memory at a specific offset to trigger this vulnerability. This was fixed in kernel releases: 4.14.222 4.19.177 5.4.99 5.10.17 5.11"}]},"impact":{"cvss":{"baseScore":4,"baseSeverity":"Medium","vectorString":"CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.0"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-908: Use of Uninitialized Resource"}]}]},"references":{"reference_data":[{"name":"https://talosintelligence.com/vulnerability_reports/TALOS-2021-1243","refsource":"MISC","url":"https://talosintelligence.com/vulnerability_reports/TALOS-2021-1243"},{"name":"https://www.oracle.com/security-alerts/cpujul2022.html","refsource":"MISC","url":"https://www.oracle.com/security-alerts/cpujul2022.html"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2021-1243","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://www.oracle.com/security-alerts/cpujul2022.html","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T18:23:29.351Z"}}]}}}