CVE-2026-53084None▾ SunlitIn 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 de…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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.
Linux >= 4ac4546821584736798aaa9e97da9f6eaf689ea3 < 83b8802c034e843b83a3e1ef6f30cdd4e9ec291cLinux >= 4ac4546821584736798aaa9e97da9f6eaf689ea3 < 592226d138378601ae28eb890e2bbc23ec3600f7Linux >= 4ac4546821584736798aaa9e97da9f6eaf689ea3 < 13860ca37b8df0b856ee1ce3bdbd7c327d5f53e8Linux >= 4ac4546821584736798aaa9e97da9f6eaf689ea3 < 4cbee026db54cad39c39db4d356100cb133412b3Linux 6.7Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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