{"id":"USN-5113-1","summary":"linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11, linux-gcp, linux-gcp-5.11, linux-hwe-5.11, linux-kvm, linux-oracle, linux-oracle-5.11, linux-raspi vulnerabilities","details":"It was discovered that a race condition existed in the Atheros Ath9k WiFi\ndriver in the Linux kernel. An attacker could possibly use this to expose\nsensitive information (WiFi network traffic). (CVE-2020-3702)\n\nAlois Wohlschlager discovered that the overlay file system in the Linux\nkernel did not restrict private clones in some situations. An attacker\ncould use this to expose sensitive information. (CVE-2021-3732)\n\nIt was discovered that the btrfs file system in the Linux kernel did not\nproperly handle removing a non-existent device id. An attacker with\nCAP_SYS_ADMIN could use this to cause a denial of service. (CVE-2021-3739)\n\nIt was discovered that the Qualcomm IPC Router protocol implementation in\nthe Linux kernel did not properly validate metadata in some situations. A\nlocal attacker could use this to cause a denial of service (system crash)\nor expose sensitive information. (CVE-2021-3743)\n\nIt was discovered that the virtual terminal (vt) device implementation in\nthe Linux kernel contained a race condition in its ioctl handling that led\nto an out-of-bounds read vulnerability. A local attacker could possibly use\nthis to expose sensitive information. (CVE-2021-3753)\n\nIt was discovered that the BPF subsystem in the Linux kernel contained an\ninteger overflow in its hash table implementation. A local attacker could\nuse this to cause a denial of service (system crash) or possibly execute\narbitrary code. (CVE-2021-38166)\n\nIt was discovered that the ext4 file system in the Linux kernel contained a\nrace condition when writing xattrs to an inode. A local attacker could use\nthis to cause a denial of service or possibly gain administrative\nprivileges. (CVE-2021-40490)\n\nIt was discovered that the 6pack network protocol driver in the Linux\nkernel did not properly perform validation checks. A privileged attacker\ncould use this to cause a denial of service (system crash) or execute\narbitrary code. (CVE-2021-42008)\n","modified":"2026-01-30T00:33:43.648370Z","published":"2021-10-19T22:30:36Z","related":["UBUNTU-CVE-2020-3702","UBUNTU-CVE-2021-3732","UBUNTU-CVE-2021-3739","UBUNTU-CVE-2021-3743","UBUNTU-CVE-2021-3753","UBUNTU-CVE-2021-38166","UBUNTU-CVE-2021-40490","UBUNTU-CVE-2021-42008"],"upstream":["CVE-2020-3702","CVE-2021-3732","CVE-2021-3739","CVE-2021-3743","CVE-2021-3753","CVE-2021-38166","CVE-2021-40490","CVE-2021-42008","UBUNTU-CVE-2020-3702","UBUNTU-CVE-2021-3732","UBUNTU-CVE-2021-3739","UBUNTU-CVE-2021-3743","UBUNTU-CVE-2021-3753","UBUNTU-CVE-2021-38166","UBUNTU-CVE-2021-40490","UBUNTU-CVE-2021-42008"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5113-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-3702"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3732"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3739"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3743"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3753"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-38166"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-40490"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-42008"}],"affected":[{"package":{"name":"linux-aws-5.11","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/linux-aws-5.11@5.11.0-1020.21~20.04.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.11.0-1020.21~20.04.2"}]}],"versions":["5.11.0-1009.9~20.04.2","5.11.0-1014.15~20.04.1","5.11.0-1016.17~20.04.1","5.11.0-1017.18~20.04.1","5.11.0-1019.20~20.04.1"],"ecosystem_specific":{"availability":"No 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