This update addresses a critical (CVSS 9.1) WiFi mesh network vulnerability, CVE-2025-27558, where a physically proximate attacker can inject packets due to mishandled aggregated frames, stemming from an incomplete fix for CVE-2020-24588. It also patches numerous other critical flaws across multiple kernel subsystems, including CVE-2026-31414 (CVSS 9.8). Affected Linux kernel versions include 2.6.30 through 6.1.167, 6.2 through 6.6.133, 6.7 through 6.12.80, 6.13 through 6.18.21, and 6.19 through 6.19.11, with fixes provided in versions 6.1.168, 6.6.134, 6.12.81, 6.18.22, and 6.19.12 respectively.
Siebe Devroe, Héloïse Gollier, and Mathy Vanhoef discovered that the WiFi implementation in the Linux kernel did not properly handle aggregated frames in mesh networks, due to an incorrect fix for CVE-2020-24588. A physically proximate attacker could use this issue to inject packets. (CVE-2025-27558) 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; - InfiniBand drivers; - Network drivers; - NVME drivers; - Ext4 file system; - SMB network file system; - IPv4 networking; - Network traffic control; - TCP network protocol; - Locking primitives; - IPv6 networking; - Multipath TCP; - Netfilter; - Open vSwitch; - SCTP protocol; - SMC sockets; (CVE-2026-31414, CVE-2026-31448, CVE-2026-31705, CVE-2026-43198, CVE-2026-43378, CVE-2026-43499, CVE-2026-46266, CVE-2026-46331, CVE-2026-52924, CVE-2026-52989, CVE-2026-53086, CVE-2026-53176, CVE-2026-53212, CVE-2026-53215, CVE-2026-53224, CVE-2026-53225, CVE-2026-53228, CVE-2026-53246, CVE-2026-53359, CVE-2026-64531)