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CVE-2026-53084

5.5 · MEDIUM

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 pr…

Published Jun 24, 2026EPSS 0.16%

Overview

CVE-2026-53084 is a medium-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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.

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

Refgit.kernel.org/stable/c/13860ca37b8df0b856ee1ce3bdbd7c327d5f53e8Refgit.kernel.org/stable/c/4cbee026db54cad39c39db4d356100cb133412b3Refgit.kernel.org/stable/c/592226d138378601ae28eb890e2bbc23ec3600f7Refgit.kernel.org/stable/c/83b8802c034e843b83a3e1ef6f30cdd4e9ec291c

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53084?

CVE-2026-53084 is a medium-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-53084?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-53084?

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.

How can CyberStrike help with CVE-2026-53084?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53084 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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