CVE-2026-53084: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: bpf: return VMA snapshot from task_vma iterator Holding the per-VMA lock across the BPF program body creates a lock ordering problem when helpers acquire locks that depend on mmap_lock: vm_lock -> i_rwsem -> mmap_lock -> vm_lock Snapshot the VMA under the per-VMA lock in _next() via memcpy(), then drop the lock before returning. The BPF program accesses only the snapshot. The verifier only trusts vm_mm and vm_file pointers (see BTF_TYPE_SAFE_TRUSTED_OR_NULL in verifier.c). vm_file is reference- counted with get_file() under the lock and released via fput() on the next iteration or in _destroy(). vm_mm is already correct because lock_vma_under_rcu() verifies vma->vm_mm == mm. All other pointers are left as-is by memcpy() since the verifier treats them as untrusted.

Засегнати продукти

• Linux Linux: 4ac4546821584736798aaa9e97da9f6eaf689ea3 преди 83b8802c034e843b83a3e1ef6f30cdd4e9ec291c; 4ac4546821584736798aaa9e97da9f6eaf689ea3 преди 592226d138378601ae28eb890e2bbc23ec3600f7; 4ac4546821584736798aaa9e97da9f6eaf689ea3 преди 13860ca37b8df0b856ee1ce3bdbd7c327d5f53e8; 4ac4546821584736798aaa9e97da9f6eaf689ea3 преди 4cbee026db54cad39c39db4d356100cb133412b3
• Linux Linux: 6.7; преди 6.7; 6.12.91 до 6.12.*; 6.18.33 до 6.18.*; 7.0.10 до 7.0.*; 7.1 до *

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-53084
• https://nvd.nist.gov/vuln/detail/CVE-2026-53084
• https://git.kernel.org/stable/c/83b8802c034e843b83a3e1ef6f30cdd4e9ec291c
• https://git.kernel.org/stable/c/592226d138378601ae28eb890e2bbc23ec3600f7
• https://git.kernel.org/stable/c/13860ca37b8df0b856ee1ce3bdbd7c327d5f53e8
• https://git.kernel.org/stable/c/4cbee026db54cad39c39db4d356100cb133412b3