cve-2026-45838

CVE-2026-45838 is a Linux kernel BPF cgroup vulnerability published by NVD on May 27, 2026. The flaw resides in the cgroup_storage_get_next_key() function, where incorrect end-of-list handling can copy data from an invalid internal pointer to userspace. Although not yet scored by NVD, the bug represents a kernel bookkeeping error that could impact systems using BPF, containers, and cgroups. Discussions on WindowsForum highlight the risk this poses to modern Linux estates, as these components sit at the intersection of observability, isolation, and privilege. Users are advised to monitor upstream kernel patches and assess exposure in their environments.