linux-cve-announce - CVE-2025-38201: netfilter: nft_set_pipapo: clamp maximum map bucket size to INT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <2025070418-CVE-2025-38201-9575@gregkh>
Date: Fri,  4 Jul 2025 15:37:30 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38201: netfilter: nft_set_pipapo: clamp maximum map bucket size to INT_MAX

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

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

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

netfilter: nft_set_pipapo: clamp maximum map bucket size to INT_MAX

Otherwise, it is possible to hit WARN_ON_ONCE in __kvmalloc_node_noprof()
when resizing hashtable because __GFP_NOWARN is unset.

Similar to:

  b541ba7d1f5a ("netfilter: conntrack: clamp maximum hashtable size to INT_MAX")

The Linux kernel CVE team has assigned CVE-2025-38201 to this issue.


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

	Fixed in 6.12.35 with commit 0ab3de047808f375a36cd345225572eb3366f3c6
	Fixed in 6.15.4 with commit d2768016f091f8a5264076b433fd7c3fabb6eb97
	Fixed in 6.16-rc1 with commit b85e3367a5716ed3662a4fe266525190d2af76df

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-2025-38201
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/nft_set_pipapo.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/0ab3de047808f375a36cd345225572eb3366f3c6
	https://git.kernel.org/stable/c/d2768016f091f8a5264076b433fd7c3fabb6eb97
	https://git.kernel.org/stable/c/b85e3367a5716ed3662a4fe266525190d2af76df