{"id":"USN-4318-1","summary":"linux, linux-hwe vulnerabilities","details":"Al Viro discovered that the vfs layer in the Linux kernel contained a use-\nafter-free vulnerability. A local attacker could use this to cause a denial\nof service (system crash) or possibly expose sensitive information (kernel\nmemory). (CVE-2020-8428)\n\nGustavo Romero and Paul Mackerras discovered that the KVM implementation in\nthe Linux kernel for PowerPC processors did not properly keep guest state\nseparate from host state. A local attacker in a KVM guest could use this to\ncause a denial of service (host system crash). (CVE-2020-8834)\n\nShijie Luo discovered that the ext4 file system implementation in the Linux\nkernel did not properly check for a too-large journal size. An attacker\ncould use this to construct a malicious ext4 image that, when mounted,\ncould cause a denial of service (soft lockup). (CVE-2020-8992)\n","modified":"2026-02-10T04:41:48Z","published":"2020-04-06T20:29:11Z","related":["UBUNTU-CVE-2020-8428","UBUNTU-CVE-2020-8834","UBUNTU-CVE-2020-8992"],"upstream":["CVE-2020-8428","CVE-2020-8834","CVE-2020-8992","UBUNTU-CVE-2020-8428","UBUNTU-CVE-2020-8834","UBUNTU-CVE-2020-8992"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4318-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-8428"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-8834"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-8992"}],"affected":[{"package":{"name":"linux-hwe","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/linux-hwe@4.15.0-96.97~16.04.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-96.97~16.04.1"}]}],"versions":["4.8.0-36.36~16.04.1","4.8.0-39.42~16.04.1","4.8.0-41.44~16.04.1","4.8.0-42.45~16.04.1","4.8.0-44.47~16.04.1","4.8.0-45.48~16.04.1","4.8.0-46.49~16.04.1","4.8.0-49.52~16.04.1","4.8.0-51.54~16.04.1","4.8.0-52.55~16.04.1","4.8.0-53.56~16.04.1","4.8.0-54.57~16.04.1","4.8.0-56.61~16.04.1","4.8.0-58.63~16.04.1","4.10.0-27.30~16.04.2","4.10.0-28.32~16.04.2","4.10.0-30.34~16.04.1","4.10.0-32.36~16.04.1","4.10.0-33.37~16.04.1","4.10.0-35.39~16.04.1","4.10.0-37.41~16.04.1","4.10.0-38.42~16.04.1","4.10.0-40.44~16.04.1","4.10.0-42.46~16.04.1","4.13.0-26.29~16.04.2","4.13.0-31.34~16.04.1","4.13.0-32.35~16.04.1","4.13.0-36.40~16.04.1","4.13.0-37.42~16.04.1","4.13.0-38.43~16.04.1","4.13.0-39.44~16.04.1","4.13.0-41.46~16.04.1","4.13.0-43.48~16.04.1","4.13.0-45.50~16.04.1","4.15.0-24.26~16.04.1","4.15.0-29.31~16.04.1","4.15.0-30.32~16.04.1","4.15.0-32.35~16.04.1","4.15.0-33.36~16.04.1","4.15.0-34.37~16.04.1","4.15.0-36.39~16.04.1","4.15.0-38.41~16.04.1","4.15.0-39.42~16.04.1","4.15.0-42.45~16.04.1","4.15.0-43.46~16.04.1","4.15.0-45.48~16.04.1","4.15.0-46.49~16.04.1","4.15.0-47.50~16.04.1","4.15.0-48.51~16.04.1","4.15.0-50.54~16.04.1","4.15.0-51.55~16.04.1","4.15.0-52.56~16.04.1","4.15.0-54.58~16.04.1","4.15.0-55.60~16.04.2","4.15.0-58.64~16.04.1","4.15.0-60.67~16.04.1","4.15.0-62.69~16.04.1","4.15.0-64.73~16.04.1","4.15.0-65.74~16.04.1","4.15.0-66.75~16.04.1","4.15.0-69.78~16.04.1","4.15.0-70.79~16.04.1","4.15.0-72.81~16.04.1","4.15.0-74.83~16.04.1","4.15.0-76.86~16.04.1","4.15.0-88.88~16.04.1","4.15.0-91.92~16.04.1"],"ecosystem_specific":{"availability":"No 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