PT-2026-51894 · Linux · Linux
Published
2026-06-24
·
Updated
2026-06-24
·
CVE-2026-53000
None
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In the Linux kernel, the following vulnerability has been resolved:
netfilter: nat: use kfree rcu to release ops
Florian Westphal says:
"Historically this is not an issue, even for normal base hooks: the data
path doesn't use the original nf hook ops that are used to register the
callbacks.
However, in v5.14 I added the ability to dump the active netfilter
hooks from userspace.
This code will peek back into the nf hook ops that are available
at the tail of the pointer-array blob used by the datapath.
The nat hooks are special, because they are called indirectly from
the central nat dispatcher hook. They are currently invisible to
the nfnl hook dump subsystem though.
But once that changes the nat ops structures have to be deferred too."
Update nf nat register fn() to deal with partial exposition of the hooks
from error path which can be also an issue for nfnetlink hook.
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Related Identifiers
Affected Products
Linux