USN-5091-1: Linux kernel vulnerabilities<\/p>\n
Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk
\ndiscovered that the BPF verifier in the Linux kernel missed possible
\nmispredicted branches due to type confusion, allowing a side-channel
\nattack. An attacker could use this to expose sensitive information.
\n(CVE-2021-33624)<\/p>\n
It was discovered that the tracing subsystem in the Linux kernel did not
\nproperly keep track of per-cpu ring buffer state. A privileged attacker
\ncould use this to cause a denial of service. (CVE-2021-3679)<\/p>\n
Alexey Kardashevskiy discovered that the KVM implementation for PowerPC
\nsystems in the Linux kernel did not properly validate RTAS arguments in
\nsome situations. An attacker in a guest vm could use this to cause a denial
\nof service (host OS crash) or possibly execute arbitrary code.
\n(CVE-2021-37576)<\/p>\n
It was discovered that the Virtio console implementation in the Linux
\nkernel did not properly validate input lengths in some situations. A local
\nattacker could possibly use this to cause a denial of service (system
\ncrash). (CVE-2021-38160)<\/p>\n
Michael Wakabayashi discovered that the NVSv4 client implementation in the
\nLinux kernel did not properly order connection setup operations. An
\nattacker controlling a remote NFS server could use this to cause a denial
\nof service on the client. (CVE-2021-38199)<\/p>\n
It was discovered that the MAX-3421 host USB device driver in the Linux USN-5091-1: Linux kernel vulnerabilities Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in the Linux kernel missed possible mispredicted branches due to type confusion, allowing a side-channel attack. An attacker could use this to expose sensitive information. (CVE-2021-33624) It was discovered that the tracing subsystem in the Linux kernel did not properly keep track of per-cpu ring buffer state. A privileged attacker could use this to cause a denial of service. (CVE-2021-3679) Alexey Kardashevskiy discovered that the KVM implementation for PowerPC systems in the Linux kernel did not properly validate RTAS arguments in some situations. An attacker in a guest vm could use this to cause a denial of service (host OS crash) or possibly execute arbitrary code. (CVE-2021-37576) It was discovered that the Virtio console implementation in the Linux kernel did not properly [ more… ]<\/a><\/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-43429","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\/43429","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=43429"}],"version-history":[{"count":1,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/43429\/revisions"}],"predecessor-version":[{"id":43430,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/43429\/revisions\/43430"}],"wp:attachment":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/media?parent=43429"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/categories?post=43429"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/tags?post=43429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nkernel did not properly handle device removal events. A physically
\nproximate attacker could use this to cause a denial of service (system
\ncrash). (CVE-2021-38204)
\nSource: USN-5091-1: Linux kernel vulnerabilities<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"