{"id":"USN-7506-4","summary":"linux-lts-xenial vulnerabilities","details":"Demi Marie Obenour and Simon Gaiser discovered that several Xen para-\nvirtualization device frontends did not properly restrict the access rights\nof device backends. An attacker could possibly use a malicious Xen backend\nto gain access to memory pages of a guest VM or cause a denial of service\nin the guest. (CVE-2022-23041)\n\nSeveral security issues were discovered in the Linux kernel.\nAn attacker could possibly use these to compromise the system.\nThis update corrects flaws in the following subsystems:\n  - Hardware crypto device drivers;\n  - GPU drivers;\n  - IIO subsystem;\n  - Media drivers;\n  - Network drivers;\n  - SCSI subsystem;\n  - SPI subsystem;\n  - USB Gadget drivers;\n  - Ceph distributed file system;\n  - File systems infrastructure;\n  - JFS file system;\n  - Network file system (NFS) client;\n  - Network file system (NFS) server daemon;\n  - NILFS2 file system;\n  - SMB network file system;\n  - CAN network layer;\n  - IPv6 networking;\n  - MAC80211 subsystem;\n  - Netfilter;\n  - Netlink;\n  - Network traffic control;\n  - SCTP protocol;\n  - TIPC protocol;\n(CVE-2024-46771, CVE-2021-47500, CVE-2024-56631, CVE-2021-47219,\nCVE-2021-47163, CVE-2024-50256, CVE-2024-56650, CVE-2024-46780,\nCVE-2021-47506, CVE-2024-26996, CVE-2025-21971, CVE-2021-47587,\nCVE-2021-47245, CVE-2024-56598, CVE-2021-46959, CVE-2024-26974,\nCVE-2024-56642, CVE-2023-52741, CVE-2021-47150, CVE-2024-53173,\nCVE-2024-26915, CVE-2024-36934, CVE-2024-56770, CVE-2024-53063,\nCVE-2021-47191, CVE-2024-26689, CVE-2024-53066, CVE-2024-35864,\nCVE-2024-50237, CVE-2024-53140, CVE-2024-49944)\n","modified":"2026-04-27T17:28:36.232214Z","published":"2025-05-13T07:32:20Z","related":["UBUNTU-CVE-2021-46959","UBUNTU-CVE-2021-47150","UBUNTU-CVE-2021-47163","UBUNTU-CVE-2021-47191","UBUNTU-CVE-2021-47219","UBUNTU-CVE-2021-47245","UBUNTU-CVE-2021-47500","UBUNTU-CVE-2021-47506","UBUNTU-CVE-2021-47587","UBUNTU-CVE-2022-23041","UBUNTU-CVE-2023-52741","UBUNTU-CVE-2024-26689","UBUNTU-CVE-2024-26915","UBUNTU-CVE-2024-26974","UBUNTU-CVE-2024-26996","UBUNTU-CVE-2024-35864","UBUNTU-CVE-2024-36934","UBUNTU-CVE-2024-46771","UBUNTU-CVE-2024-46780","UBUNTU-CVE-2024-49944","UBUNTU-CVE-2024-50237","UBUNTU-CVE-2024-50256","UBUNTU-CVE-2024-53063","UBUNTU-CVE-2024-53066","UBUNTU-CVE-2024-53140","UBUNTU-CVE-2024-53173","UBUNTU-CVE-2024-56598","UBUNTU-CVE-2024-56631","UBUNTU-CVE-2024-56642","UBUNTU-CVE-2024-56650","UBUNTU-CVE-2024-56770","UBUNTU-CVE-2025-21971"],"upstream":["CVE-2021-46959","CVE-2021-47150","CVE-2021-47163","CVE-2021-47191","CVE-2021-47219","CVE-2021-47245","CVE-2021-47500","CVE-2021-47506","CVE-2021-47587","CVE-2022-23041","CVE-2023-52741","CVE-2024-26689","CVE-2024-26915","CVE-2024-26974","CVE-2024-26996","CVE-2024-35864","CVE-2024-36934","CVE-2024-46771","CVE-2024-46780","CVE-2024-49944","CVE-2024-50237","CVE-2024-50256","CVE-2024-53063","CVE-2024-53066","CVE-2024-53140","CVE-2024-53173","CVE-2024-56598","CVE-2024-56631","CVE-2024-56642","CVE-2024-56650","CVE-2024-56770","CVE-2025-21971","UBUNTU-CVE-2021-46959","UBUNTU-CVE-2021-47150","UBUNTU-CVE-2021-47163","UBUNTU-CVE-2021-47191","UBUNTU-CVE-2021-47219","UBUNTU-CVE-2021-47245","UBUNTU-CVE-2021-47500","UBUNTU-CVE-2021-47506","UBUNTU-CVE-2021-47587","UBUNTU-CVE-2022-23041","UBUNTU-CVE-2023-52741","UBUNTU-CVE-2024-26689","UBUNTU-CVE-2024-26915","UBUNTU-CVE-2024-26974","UBUNTU-CVE-2024-26996","UBUNTU-CVE-2024-35864","UBUNTU-CVE-2024-36934","UBUNTU-CVE-2024-46771","UBUNTU-CVE-2024-46780","UBUNTU-CVE-2024-49944","UBUNTU-CVE-2024-50237","UBUNTU-CVE-2024-50256","UBUNTU-CVE-2024-53063","UBUNTU-CVE-2024-53066","UBUNTU-CVE-2024-53140","UBUNTU-CVE-2024-53173","UBUNTU-CVE-2024-56598","UBUNTU-CVE-2024-56631","UBUNTU-CVE-2024-56642","UBUNTU-CVE-2024-56650","UBUNTU-CVE-2024-56770","UBUNTU-CVE-2025-21971"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7506-4"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-46959"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-47150"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-47163"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-47191"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-47219"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-47245"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-47500"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-47506"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-47587"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2022-23041"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-52741"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-26689"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-26915"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-26974"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-26996"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-35864"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-36934"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-46771"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-46780"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-49944"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-50237"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-50256"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-53063"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-53066"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-53140"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-53173"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-56598"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-56631"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-56642"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-56650"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-56770"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-21971"}],"affected":[{"package":{"name":"linux-lts-xenial","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/linux-lts-xenial@4.4.0-268.302~14.04.1?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.0-268.302~14.04.1"}]}],"versions":["4.4.0-13.29~14.04.1","4.4.0-14.30~14.04.2","4.4.0-15.31~14.04.1","4.4.0-18.34~14.04.1","4.4.0-21.37~14.04.1","4.4.0-22.39~14.04.1","4.4.0-22.40~14.04.1","4.4.0-24.43~14.04.1","4.4.0-28.47~14.04.1","4.4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