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 E48A12135B6 for ; Wed, 26 Feb 2025 02:00:36 +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=1740535237; cv=none; b=XByPRfZXxRCq/tPrbyJEmISrFu4RvAxqFTqL42cJQjIVVeSkIxAP/+bISdS4QceRUuGk38bd7a8M5P2VWfHEUh4AvgYTm1c+R6g1cf+IR495hGbybiXQFuDW7eqOEtydDAZFIt6cCc4vR9gPlZYSiT9f3J7Tl7OYNzWVUHNJ1bc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740535237; c=relaxed/simple; bh=qVvbt3a5ghstN0FjZ/RewbmLFW9+fYum2uq5+OpATkg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=hJBMSPWG70C8Duqo75rWZNlWwzTQBQWOPSPoat8d0LQMyBnj2YjhT3dy3r2zk8tLU6IP4WsgyK6Gi5Niq4PA0CuKU+CjaTUtYS/lEBVJHam71ZxjxYCTiSA/eYbr3QL9CRBuFWLAsm5EEp9fhZWeJhCudLFEci0Qikcu3VJ+MMo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=x/Q2wAoV; 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="x/Q2wAoV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B5EF0C4CEDD; Wed, 26 Feb 2025 02:00:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1740535236; bh=qVvbt3a5ghstN0FjZ/RewbmLFW9+fYum2uq5+OpATkg=; h=From:To:Cc:Subject:Date:Reply-to:From; b=x/Q2wAoVr2cXvRyZ8BR41TA+uKZuMvb5ka4L3OhF7wRA2GlfIHqJ1QSO2JuUwylvr Nb3a/OXqve+Nt3Yc6+W2ubjnbaa9eFJu3tsjQVgsmvtrasJyCu15PI4y8qrdaTFwnT 89B1w0//u2T6U/5BTwCGRFnJdLeUcj+0/4zSQmow= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2022-49290: mac80211: fix potential double free on mesh join Date: Wed, 26 Feb 2025 02:58:15 +0100 Message-ID: <2025022633-CVE-2022-49290-42e8@gregkh> X-Mailer: git-send-email 2.48.1 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=4885; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=qVvbt3a5ghstN0FjZ/RewbmLFW9+fYum2uq5+OpATkg=; b=owGbwMvMwCRo6H6F97bub03G02pJDOn7SiK5dmUzf3M9l3ux9xbrpan72c9p+10vdaw0/Zv1r 9JuWopCRywLgyATg6yYIsuXbTxH91ccUvQytD0NM4eVCWQIAxenAExEfQXDgn3TD0mfL9/+ceqH Q5vM55lYLRe92sCwYHXGnraaXV9iGOU8k679aeJ/58Z+AgA= 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: mac80211: fix potential double free on mesh join While commit 6a01afcf8468 ("mac80211: mesh: Free ie data when leaving mesh") fixed a memory leak on mesh leave / teardown it introduced a potential memory corruption caused by a double free when rejoining the mesh: ieee80211_leave_mesh() -> kfree(sdata->u.mesh.ie); ... ieee80211_join_mesh() -> copy_mesh_setup() -> old_ie = ifmsh->ie; -> kfree(old_ie); This double free / kernel panics can be reproduced by using wpa_supplicant with an encrypted mesh (if set up without encryption via "iw" then ifmsh->ie is always NULL, which avoids this issue). And then calling: $ iw dev mesh0 mesh leave $ iw dev mesh0 mesh join my-mesh Note that typically these commands are not used / working when using wpa_supplicant. And it seems that wpa_supplicant or wpa_cli are going through a NETDEV_DOWN/NETDEV_UP cycle between a mesh leave and mesh join where the NETDEV_UP resets the mesh.ie to NULL via a memcpy of default_mesh_setup in cfg80211_netdev_notifier_call, which then avoids the memory corruption, too. The issue was first observed in an application which was not using wpa_supplicant but "Senf" instead, which implements its own calls to nl80211. Fixing the issue by removing the kfree()'ing of the mesh IE in the mesh join function and leaving it solely up to the mesh leave to free the mesh IE. The Linux kernel CVE team has assigned CVE-2022-49290 to this issue. Affected and fixed versions =========================== Issue introduced in 4.9.233 with commit 3212d6248faf0efce6b7a718e198feecce0eea05 and fixed in 4.9.309 with commit 615716af8644813355e014314a0bc1e961250f5a Issue introduced in 4.14.192 with commit 86e7d4cd2ed5f4b0188afce8199faffcf1ae7c7e and fixed in 4.14.274 with commit c1d9c3628ef0a0ca197595d0f9e01cd3b5dda186 Issue introduced in 4.19.137 with commit 37bccfa89559a70c044b5ccde3c916a91388e14a and fixed in 4.19.237 with commit 273ebddc5fda2967492cb0b6cdd7d81cfb821b76 Issue introduced in 5.4.56 with commit 3f15e3e62c80e180282f0cbc5559264e11c328b7 and fixed in 5.4.188 with commit 3bbd0000d012f92aec423b224784fbf0f7bf40f8 Issue introduced in 5.8 with commit 6a01afcf8468d3ca2bd8bbb27503f60dcf643b20 and fixed in 5.10.109 with commit 5d3ff9542a40ce034416bca03864709540a36016 Issue introduced in 5.8 with commit 6a01afcf8468d3ca2bd8bbb27503f60dcf643b20 and fixed in 5.15.32 with commit 12e407a8ef17623823fd0c066fbd7f103953d28d Issue introduced in 5.8 with commit 6a01afcf8468d3ca2bd8bbb27503f60dcf643b20 and fixed in 5.16.18 with commit 582d8c60c0c053684f7138875e8150d5749ffc17 Issue introduced in 5.8 with commit 6a01afcf8468d3ca2bd8bbb27503f60dcf643b20 and fixed in 5.17.1 with commit 46bb87d40683337757a2f902fcd4244b32bb4e86 Issue introduced in 5.8 with commit 6a01afcf8468d3ca2bd8bbb27503f60dcf643b20 and fixed in 5.18 with commit 4a2d4496e15ea5bb5c8e83b94ca8ca7fb045e7d3 Issue introduced in 4.4.233 with commit 12e9cb1e7c93413112260991d094cfda712fdc97 Issue introduced in 5.7.13 with commit 4f3193e08602462a806e8f53212e79c60a6f7488 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-2022-49290 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/mac80211/cfg.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/615716af8644813355e014314a0bc1e961250f5a https://git.kernel.org/stable/c/c1d9c3628ef0a0ca197595d0f9e01cd3b5dda186 https://git.kernel.org/stable/c/273ebddc5fda2967492cb0b6cdd7d81cfb821b76 https://git.kernel.org/stable/c/3bbd0000d012f92aec423b224784fbf0f7bf40f8 https://git.kernel.org/stable/c/5d3ff9542a40ce034416bca03864709540a36016 https://git.kernel.org/stable/c/12e407a8ef17623823fd0c066fbd7f103953d28d https://git.kernel.org/stable/c/582d8c60c0c053684f7138875e8150d5749ffc17 https://git.kernel.org/stable/c/46bb87d40683337757a2f902fcd4244b32bb4e86 https://git.kernel.org/stable/c/4a2d4496e15ea5bb5c8e83b94ca8ca7fb045e7d3