Multiple vulnerabilities in the Linux kernel, including critical flaws in the AppArmor LSM, allow an unprivileged local attacker to manipulate AppArmor profiles, leading to denial of service, information disclosure, privilege escalation, or container escape. The article references several CVEs with CVSS scores ranging from 4.7 to 5.5 (MEDIUM), such as CVE-2021-47599 and CVE-2022-48875. Affected versions vary per CVE; for example, CVE-2021-47599 affects linux_kernel 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)