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Vulnerability Details CVE-2026-45838

In the Linux kernel, the following vulnerability has been resolved: bpf: fix end-of-list detection in cgroup_storage_get_next_key() list_next_entry() never returns NULL -- when the current element is the last entry it wraps to the list head via container_of(). The subsequent NULL check is therefore dead code and get_next_key() never returns -ENOENT for the last element, instead reading storage->key from a bogus pointer that aliases internal map fields and copying the result to userspace. Replace it with list_entry_is_head() so the function correctly returns -ENOENT when there are no more entries.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 1.8%
CVSS Severity
CVSS v3 Score 5.5
Products affected by CVE-2026-45838


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