{"id":"USN-4367-1","summary":"linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-oracle, linux-raspi, linux-riscv vulnerabilities","details":"It was discovered that the btrfs implementation in the Linux kernel did not\nproperly detect that a block was marked dirty in some situations. An\nattacker could use this to specially craft a file system image that, when\nunmounted, could cause a denial of service (system crash). (CVE-2019-19377)\n\nIt was discovered that the linux kernel did not properly validate certain\nmount options to the tmpfs virtual memory file system. A local attacker\nwith the ability to specify mount options could use this to cause a denial\nof service (system crash). (CVE-2020-11565)\n\nIt was discovered that the block layer in the Linux kernel contained a race\ncondition leading to a use-after-free vulnerability. A local attacker could\npossibly use this to cause a denial of service (system crash) or execute\narbitrary code. (CVE-2020-12657)\n","modified":"2026-02-10T04:41:50Z","published":"2020-05-24T02:16:45Z","related":["UBUNTU-CVE-2019-19377","UBUNTU-CVE-2020-11565","UBUNTU-CVE-2020-12657","UBUNTU-CVE-2020-12826"],"upstream":["CVE-2019-19377","CVE-2020-11565","CVE-2020-12657","CVE-2020-12826","UBUNTU-CVE-2019-19377","UBUNTU-CVE-2020-11565","UBUNTU-CVE-2020-12657","UBUNTU-CVE-2020-12826"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4367-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-19377"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-11565"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-12657"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-12826"}],"affected":[{"package":{"name":"linux","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/linux@5.4.0-31.35?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-31.35"}]}],"versions":["5.3.0-18.19","5.3.0-24.26","5.4.0-9.12","5.4.0-18.22","5.4.0-21.25","5.4.0-24.28","5.4.0-25.29","5.4.0-26.30","5.4.0-28.32","5.4.0-29.33"],"ecosystem_specific":{"availability":"No 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