Multiple vulnerabilities in the AppArmor Linux kernel Security Module allow an unprivileged local attacker to load, replace, or remove arbitrary AppArmor profiles, leading to denial of service, information disclosure, local privilege escalation, or container escape. The article also references additional flaws across multiple kernel subsystems including x86, BTRFS, and networking, but specific attack vectors for these are not detailed. Affected kernel versions vary per CVE; for example, CVE-2021-47599 (CVSS 4.7) affects versions prior to 5.15.11, which is the fixed version.
Qualys discovered that several vulnerabilities existed in the AppArmor Linux kernel Security Module (LSM). An unprivileged local attacker could use these issues to load, replace, and remove arbitrary AppArmor profiles causing denial of service, exposure of sensitive information (kernel memory), local privilege escalation, or possibly escape a container. (LP: #2143853) Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - x86 architecture; - GPIO subsystem; - GPU drivers; - BTRFS file system; - XFRM subsystem; - IPv4 networking; - IPv6 networking; - MAC80211 subsystem; - SMC sockets; (CVE-2021-47599, CVE-2022-48875, CVE-2022-49072, CVE-2024-49927, CVE-2024-56640, CVE-2025-21780, CVE-2025-40215)