CVE-2026-90062: netfilter: nf_tables: move hardware offload step after building the chain blob

CVE-2026-90062: netfilter: nf_tables: move hardware offload step after building the chain blob

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@kernel.org>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_tables: move hardware offload step after building the chain blob

Allocate the chain blob before the ruleset offload to reduce chances of
entering an inconsistent state where the offloaded ruleset in the nic
and the software ruleset differ.

The Linux kernel CVE team has assigned CVE-2026-90062 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 5.3 with commit c9626a2cbdb20e26587b3fad99960520a023432b and fixed in 5.10.270 with commit 923f824f30faebc5560c3061a595063cecdbdbb8
	Issue introduced in 5.3 with commit c9626a2cbdb20e26587b3fad99960520a023432b and fixed in 5.15.221 with commit 6e7ad6e69be4751ab2476042c70c600bdaa8d4f2
	Issue introduced in 5.3 with commit c9626a2cbdb20e26587b3fad99960520a023432b and fixed in 6.1.188 with commit 309acbab74e46114246bf4346c9b60b3d8cb4fcd
	Issue introduced in 5.3 with commit c9626a2cbdb20e26587b3fad99960520a023432b and fixed in 6.6.157 with commit 79eafe22ab0a650996da2b3e5d94a12c3e16f3aa
	Issue introduced in 5.3 with commit c9626a2cbdb20e26587b3fad99960520a023432b and fixed in 6.12.110 with commit 52febaf1d311d6ede312b2ec7692a309714f9554
	Issue introduced in 5.3 with commit c9626a2cbdb20e26587b3fad99960520a023432b and fixed in 6.18.52 with commit d5497644329d3a01e951aba76561bbd883ff6b0c
	Issue introduced in 5.3 with commit c9626a2cbdb20e26587b3fad99960520a023432b and fixed in 7.2.6 with commit 6a7d3b074cfbb64513f5f92d60ab1b216ae98076
	Issue introduced in 5.3 with commit c9626a2cbdb20e26587b3fad99960520a023432b and fixed in 7.3-rc1 with commit b1881d362e1924b66f6016c3efd28807032b41bf

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2026-90062
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	net/netfilter/nf_tables_api.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/923f824f30faebc5560c3061a595063cecdbdbb8
	https://git.kernel.org/stable/c/6e7ad6e69be4751ab2476042c70c600bdaa8d4f2
	https://git.kernel.org/stable/c/309acbab74e46114246bf4346c9b60b3d8cb4fcd
	https://git.kernel.org/stable/c/79eafe22ab0a650996da2b3e5d94a12c3e16f3aa
	https://git.kernel.org/stable/c/52febaf1d311d6ede312b2ec7692a309714f9554
	https://git.kernel.org/stable/c/d5497644329d3a01e951aba76561bbd883ff6b0c
	https://git.kernel.org/stable/c/6a7d3b074cfbb64513f5f92d60ab1b216ae98076
	https://git.kernel.org/stable/c/b1881d362e1924b66f6016c3efd28807032b41bf