CVE-2026-72110

/// Technical description

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.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References