From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7EEDC12BF3D for ; Wed, 1 May 2024 13:07:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714568840; cv=none; b=i/5lWkp2RcTzVmxERY9WzwoDZTgjqhBIdbSm3/E3GWOcBuBP74SXX8C/Wd+FGtfOzH851JTee+XIlohU3rb5OQEEcR/T9PTJdM/qDPj3yrnroArWOaHFIu0RIIHYTHBqNTvtyoE887VssYrcIL11NsN4LnRmTVtrBcz8lM0lG1Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714568840; c=relaxed/simple; bh=fT6Oa6NMxMK2TF1ufnv6VYDGRc6c7XcR+Dcqb/ROdX0=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=OARpGXKYjsaC1iKVY6oJbkWjdixipoGCXEG7DJGKfadr0kUT8pqQgM09DqCyubmu3eMJxA8JjOj6yidI/+46wB6IN1z6T2n+hUPG6nnrbfAs2MCstJ8N/vXIJnAgURRPOgmvfZ2QtmrwGHjoKQd7IqNiuvt8N61Wp23kqu31YJA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=dP0X5x9z; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="dP0X5x9z" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C4ADFC113CC; Wed, 1 May 2024 13:07:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1714568840; bh=fT6Oa6NMxMK2TF1ufnv6VYDGRc6c7XcR+Dcqb/ROdX0=; h=From:To:Cc:Subject:Date:Reply-to:From; b=dP0X5x9zA6x6/tLZP7woeQV+SXpVUs96f5bXHuE1VH2WmidTPAOt7NkrOGdY44ebp inXKclJt1WcQpcQMrmYOyAFhqqd6ygOuZ3aVrNnZswDn5IQ2QBFbHeMgbRm6oZ5mAG uenwuD5l9xwEj46aBHLf/LEJZRbL+9BjijEZLRUE= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2024-27390: ipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down() Date: Wed, 1 May 2024 15:06:54 +0200 Message-ID: <2024050135-CVE-2024-27390-e55f@gregkh> X-Mailer: git-send-email 2.44.0 Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Reply-to: , X-Developer-Signature: v=1; a=openpgp-sha256; l=2637; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=fT6Oa6NMxMK2TF1ufnv6VYDGRc6c7XcR+Dcqb/ROdX0=; b=owGbwMvMwCRo6H6F97bub03G02pJDGlGdtFpezd+aFFUdTFgPbx65bn1atK7imaVfmRaE/LHh mfmyVT+jlgWBkEmBlkxRZYv23iO7q84pOhlaHsaZg4rE8gQBi5OAZhIez7D/NDw0pOvhTilbnnk sfMXZhrpijWwMCy4GHK/6mdGvM8fn/2Pv3XJ/FnDKXwHAA== X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit Description =========== In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down() As discussed in the past (commit 2d3916f31891 ("ipv6: fix skb drops in igmp6_event_query() and igmp6_event_report()")) I think the synchronize_net() call in ipv6_mc_down() is not needed. Under load, synchronize_net() can last between 200 usec and 5 ms. KASAN seems to agree as well. The Linux kernel CVE team has assigned CVE-2024-27390 to this issue. Affected and fixed versions =========================== Issue introduced in 5.13 with commit f185de28d9ae and fixed in 5.15.153 with commit 9d159d6637cc Issue introduced in 5.13 with commit f185de28d9ae and fixed in 6.1.83 with commit a03ede2282eb Issue introduced in 5.13 with commit f185de28d9ae and fixed in 6.6.23 with commit 26d4bac55750 Issue introduced in 5.13 with commit f185de28d9ae and fixed in 6.7.11 with commit 7eb06ee59211 Issue introduced in 5.13 with commit f185de28d9ae and fixed in 6.8.2 with commit 5da9a218340a Issue introduced in 5.13 with commit f185de28d9ae and fixed in 6.9-rc1 with commit 17ef8efc00b3 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-2024-27390 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/ipv6/mcast.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/9d159d6637ccce25f879d662a480541ef4ba3a50 https://git.kernel.org/stable/c/a03ede2282ebbd181bd6f5c38cbfcb5765afcd04 https://git.kernel.org/stable/c/26d4bac55750d535f1f0b8790dc26daf6089e373 https://git.kernel.org/stable/c/7eb06ee5921189812e6b4bfe7b0f1e878be16df7 https://git.kernel.org/stable/c/5da9a218340a2bc804dc4327e5804392e24a0b88 https://git.kernel.org/stable/c/17ef8efc00b34918b966388b2af0993811895a8c