USN-4876-1: Linux kernel vulnerabilities<\/p>\n
Olivier Benjamin and Pawel Wieczorkiewicz discovered a race condition the
\nXen paravirt block backend in the Linux kernel, leading to a use-after-free
\nvulnerability. An attacker in a guest VM could use this to cause a denial
\nof service in the host OS. (CVE-2020-29569)<\/p>\n
It was discovered that the Marvell WiFi-Ex device driver in the Linux
\nkernel did not properly validate ad-hoc SSIDs. A local attacker could use
\nthis to cause a denial of service (system crash) or possibly execute
\narbitrary code. (CVE-2020-36158)<\/p>\n
\u5434\u5f02 discovered that the NFS implementation in the Linux kernel did not USN-4876-1: Linux kernel vulnerabilities Olivier Benjamin and Pawel Wieczorkiewicz discovered a race condition the Xen paravirt block backend in the Linux kernel, leading to a use-after-free vulnerability. An attacker in a guest VM could use this to cause a denial of service in the host OS. (CVE-2020-29569) It was discovered that the Marvell WiFi-Ex device driver in the Linux kernel did not properly validate ad-hoc SSIDs. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-36158) \u5434\u5f02 discovered that the NFS implementation in the Linux kernel did not properly prevent access outside of an NFS export that is a subdirectory of a file system. An attacker could possibly use this to bypass NFS access restrictions. (CVE-2021-3178) Source: USN-4876-1: Linux kernel vulnerabilities<\/p>\n<\/div>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[586],"tags":[587],"class_list":["post-40909","post","type-post","status-publish","format-standard","hentry","category-ubuntu-usn","tag-ubuntu-usn"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/40909","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/comments?post=40909"}],"version-history":[{"count":1,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/40909\/revisions"}],"predecessor-version":[{"id":40910,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/40909\/revisions\/40910"}],"wp:attachment":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/media?parent=40909"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/categories?post=40909"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/tags?post=40909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nproperly prevent access outside of an NFS export that is a subdirectory of
\na file system. An attacker could possibly use this to bypass NFS access
\nrestrictions. (CVE-2021-3178)
\nSource: USN-4876-1: Linux kernel vulnerabilities<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"