CVE-2026-72110 (GCVE-0-2026-72110)
Vulnerability from cvelistv5
Published
2026-08-15 05:52
Modified
2026-10-16 18:44
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf,fork: wipe ->bpf_storage before bailouts that access it Currently, copy_process() can bail out to free_task() before p->bpf_storage has been initialized, with this call graph (shown here for the !CONFIG_MEMCG case): copy_process dup_task_struct arch_dup_task_struct [copies the entire task_struct, including ->bpf_storage member] [RLIMIT_NPROC check fails] delayed_free_task free_task bpf_task_storage_free rcu_dereference(task->bpf_storage) bpf_local_storage_destroy In this case, the nascent task's ->bpf_storage member that bpf_local_storage_destroy() operates on is a plain copy of the parent's ->bpf_storage pointer, not a real initialized pointer. This leads to badness (kernel hangs, UAF). This is reachable as long as the process calling fork() has been inserted into a task storage map.
References
Impacted products
Vendor Product Version
Linux Linux Version: a10787e6d58c24b51e91c19c6d16c5da89fcaa4b
Version: a10787e6d58c24b51e91c19c6d16c5da89fcaa4b
Version: a10787e6d58c24b51e91c19c6d16c5da89fcaa4b
Version: a10787e6d58c24b51e91c19c6d16c5da89fcaa4b
Version: a10787e6d58c24b51e91c19c6d16c5da89fcaa4b
Version: a10787e6d58c24b51e91c19c6d16c5da89fcaa4b
Version: a10787e6d58c24b51e91c19c6d16c5da89fcaa4b
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