{"id":"USN-4367-2","summary":"linux regression","details":"USN-4367-1 fixed vulnerabilities in the 5.4 Linux kernel. Unfortunately,\nthat update introduced a regression in overlayfs. This update corrects\nthe problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that the btrfs implementation in the Linux kernel did not\n properly detect that a block was marked dirty in some situations. An\n attacker could use this to specially craft a file system image that, when\n unmounted, could cause a denial of service (system crash). (CVE-2019-19377)\n\n It was discovered that the linux kernel did not properly validate certain\n mount options to the tmpfs virtual memory file system. A local attacker\n with the ability to specify mount options could use this to cause a denial\n of service (system crash). (CVE-2020-11565)\n\n It was discovered that the block layer in the Linux kernel contained a race\n condition leading to a use-after-free vulnerability. A local attacker could\n possibly use this to cause a denial of service (system crash) or execute\n arbitrary code. (CVE-2020-12657)\n","modified":"2026-02-10T04:41:50Z","published":"2020-05-28T22:46:00Z","references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4367-2"},{"type":"REPORT","url":"https://launchpad.net/bugs/1879690"}],"affected":[{"package":{"name":"linux","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/linux@5.4.0-33.37?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-33.37"}]}],"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","5.4.0-31.35"],"ecosystem_specific":{"binaries":[{"binary_name":"block-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"block-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"crypto-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"crypto-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"dasd-extra-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"dasd-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"fat-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"fat-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"fb-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"firewire-core-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"floppy-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"fs-core-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"fs-core-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"fs-secondary-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"fs-secondary-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"input-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"input-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"ipmi-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"ipmi-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"kernel-image-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"kernel-image-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"linux-buildinfo-5.4.0-33-generic","binary_version":"5.4.0-33.37"},{"binary_name":"linux-buildinfo-5.4.0-33-generic-lpae","binary_version":"5.4.0-33.37"},{"binary_name":"linux-buildinfo-5.4.0-33-lowlatency","binary_version":"5.4.0-33.37"},{"binary_name":"linux-cloud-tools-5.4.0-33","binary_version":"5.4.0-33.37"},{"binary_name":"linux-cloud-tools-5.4.0-33-generic","binary_version":"5.4.0-33.37"},{"binary_name":"linux-cloud-tools-5.4.0-33-lowlatency","binary_version":"5.4.0-33.37"},{"binary_name":"linux-cloud-tools-common","binary_version":"5.4.0-33.37"},{"binary_name":"linux-headers-5.4.0-33","binary_version":"5.4.0-33.37"},{"binary_name":"linux-headers-5.4.0-33-generic","binary_version":"5.4.0-33.37"},{"binary_name":"linux-headers-5.4.0-33-generic-lpae","binary_version":"5.4.0-33.37"},{"binary_name":"linux-headers-5.4.0-33-lowlatency","binary_version":"5.4.0-33.37"},{"binary_name":"linux-image-5.4.0-33-generic","binary_version":"5.4.0-33.37"},{"binary_name":"linux-image-5.4.0-33-generic-lpae","binary_version":"5.4.0-33.37"},{"binary_name":"linux-image-unsigned-5.4.0-33-generic","binary_version":"5.4.0-33.37"},{"binary_name":"linux-image-unsigned-5.4.0-33-lowlatency","binary_version":"5.4.0-33.37"},{"binary_name":"linux-libc-dev","binary_version":"5.4.0-33.37"},{"binary_name":"linux-modules-5.4.0-33-generic","binary_version":"5.4.0-33.37"},{"binary_name":"linux-modules-5.4.0-33-generic-lpae","binary_version":"5.4.0-33.37"},{"binary_name":"linux-modules-5.4.0-33-lowlatency","binary_version":"5.4.0-33.37"},{"binary_name":"linux-modules-extra-5.4.0-33-generic","binary_version":"5.4.0-33.37"},{"binary_name":"linux-source-5.4.0","binary_version":"5.4.0-33.37"},{"binary_name":"linux-tools-5.4.0-33","binary_version":"5.4.0-33.37"},{"binary_name":"linux-tools-5.4.0-33-generic","binary_version":"5.4.0-33.37"},{"binary_name":"linux-tools-5.4.0-33-generic-lpae","binary_version":"5.4.0-33.37"},{"binary_name":"linux-tools-5.4.0-33-lowlatency","binary_version":"5.4.0-33.37"},{"binary_name":"linux-tools-common","binary_version":"5.4.0-33.37"},{"binary_name":"linux-tools-host","binary_version":"5.4.0-33.37"},{"binary_name":"linux-udebs-generic","binary_version":"5.4.0-33.37"},{"binary_name":"linux-udebs-generic-lpae","binary_version":"5.4.0-33.37"},{"binary_name":"md-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"md-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"message-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"mouse-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"mouse-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"multipath-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"multipath-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"nfs-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"nfs-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"nic-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"nic-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"nic-pcmcia-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"nic-shared-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"nic-shared-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"nic-usb-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"nic-usb-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"parport-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"parport-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"pata-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"pcmcia-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"pcmcia-storage-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"plip-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"plip-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"ppp-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"ppp-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"sata-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"sata-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"scsi-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"scsi-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"serial-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"storage-core-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"storage-core-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"usb-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"usb-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"},{"binary_name":"virtio-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"vlan-modules-5.4.0-33-generic-di","binary_version":"5.4.0-33.37"},{"binary_name":"vlan-modules-5.4.0-33-generic-lpae-di","binary_version":"5.4.0-33.37"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4367-2.json","cves_map":{"cves":[],"ecosystem":"Ubuntu:20.04:LTS"}}}],"schema_version":"1.7.3"}