From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 573473783A0 for ; Sat, 15 Aug 2026 06:28:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786775307; cv=none; b=hFzEGAR0sUH1aQNJxNfK3nU6ThxwOtFUp0+IVHmpwP4f7UwunQNbQqQuhMDWvU1tPQ0NHmN+urTWyw/EGSjjNANQWYCQzF5WWp5K7b3JkgsOcg6GUK1BdlnLZ9F7RGa+QNwcbS5twqHaEhLMlZqWGvPqDvdCHEVPAYqW/xrXOr0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786775307; c=relaxed/simple; bh=nWeRYpoI0jN9a7Ml3nkCPLjSzTXIzzUNNtJB1X1JeIk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=dDMZ+VA9nQWCp9Ckf4jGDfRF0/QxxU8tMqSXlrGjTNrFZnNU9br5srL5C85XyFvQ9NyuojPEXV5y9qJwwYA+jL2F6mOn4iZuxs5q4q78lhEmaMXvoJ1MX1WSGLysBjSe1qLc5iJmO9THJb+Bj8AXf6unqFM9/QhCZkbORXOpGMQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=QJKdbPlI; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="QJKdbPlI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AAD2A1F000E9; Sat, 15 Aug 2026 06:28:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786775306; bh=bGE/9TwjyJY32YhnyWDq5rpwVBWTJViBygXM5jtJmaE=; h=From:To:Cc:Subject:Date:Reply-To; b=QJKdbPlI/YMuF0k+zlQgRJbdtLqVtMbIW8msfzdEBNYPfYebNIQ50DAfAktxW8oVN m2Lh8hfp+cQCSznjC8VyQed1RQOq4r9n7ayXehEgfQl0FMu65gZ4F53ZBN3u2v+FZo Qblo9RoiiNcvEUPs+Mn0vWruucWHmcWomU0/e96Q= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-72441: ieee802154: fix kernel-infoleak in dgram_recvmsg() Date: Sat, 15 Aug 2026 15:08:40 +0900 Message-ID: <2026081529-CVE-2026-72441-b58c@gregkh> X-Mailer: git-send-email 2.55.0 Reply-To: , Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=4941; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=ZjT9g9VScYAs2ZSlHE6ZeY0zNWD9+awKtkId6kkjEC0=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkNDF8PLeaq/zmfe33nS9bt8vr65pECv5KC1h89tF//1 paG+3VaHbEsDIJMDLJiiixftvEc3V9xSNHL0PY0zBxWJpAhDFycAjCRQ8kMc2U3bnyYzOLeP9Ht Gx/7Aqai/VHqYQzzyxw2/cuq7TY1WfD9u0Hy2uM/wq1ZAA== X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: ieee802154: fix kernel-infoleak in dgram_recvmsg() KMSAN reported a kernel-infoleak in move_addr_to_user(): BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:131 [inline] BUG: KMSAN: kernel-infoleak in _inline_copy_to_user include/linux/uaccess.h:205 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_user+0xcc/0x120 lib/usercopy.c:26 instrument_copy_to_user include/linux/instrumented.h:131 [inline] _inline_copy_to_user include/linux/uaccess.h:205 [inline] _copy_to_user+0xcc/0x120 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:236 [inline] move_addr_to_user+0x2e7/0x440 net/socket.c:302 ____sys_recvmsg+0x232/0x610 net/socket.c:2925 ... Uninit was stored to memory at: ieee802154_addr_to_sa include/net/ieee802154_netdev.h:369 [inline] dgram_recvmsg+0xa09/0xbe0 net/ieee802154/socket.c:739 The issue occurs because the `pan_id` field of `struct ieee802154_addr` is left uninitialized when the address mode is `IEEE802154_ADDR_NONE`. The execution flow is as follows: 1. `__ieee802154_rx_handle_packet()` declares a local `struct ieee802154_hdr hdr` on the stack. 2. `ieee802154_hdr_pull()` calls `ieee802154_hdr_get_addr()` to parse the source and destination addresses into this structure. 3. If the address mode is `IEEE802154_ADDR_NONE`, `ieee802154_hdr_get_addr()` previously only set the `mode` field, leaving the `pan_id` field containing uninitialized stack memory. 4. This uninitialized `pan_id` is later copied into a `struct sockaddr_ieee802154` in `dgram_recvmsg()` via `ieee802154_addr_to_sa()`. 5. Finally, `move_addr_to_user()` copies the socket address structure to user space, leaking the uninitialized bytes. Fix this by using `memset` to zero out the address structure in `ieee802154_hdr_get_addr()` when the mode is `IEEE802154_ADDR_NONE`. The Linux kernel CVE team has assigned CVE-2026-72441 to this issue. Affected and fixed versions =========================== Issue introduced in 3.15 with commit 94b4f6c21cf54029377a0645675a9d81b6cf890d and fixed in 5.10.261 with commit a2ee1a038a16e286d084bc293a7522d010a59ec3 Issue introduced in 3.15 with commit 94b4f6c21cf54029377a0645675a9d81b6cf890d and fixed in 5.15.212 with commit 09cfe665f2c5d7a8a5ed4d6b487434a011325368 Issue introduced in 3.15 with commit 94b4f6c21cf54029377a0645675a9d81b6cf890d and fixed in 6.1.178 with commit c88e687e44cb9c7690f5039a5a5941dba1f6a204 Issue introduced in 3.15 with commit 94b4f6c21cf54029377a0645675a9d81b6cf890d and fixed in 6.6.145 with commit 71b5add66c51d6764325de5f2e300bbf4f39e7a6 Issue introduced in 3.15 with commit 94b4f6c21cf54029377a0645675a9d81b6cf890d and fixed in 6.12.97 with commit fc8766467b53335220b4b594ba15bc8f8cee0c76 Issue introduced in 3.15 with commit 94b4f6c21cf54029377a0645675a9d81b6cf890d and fixed in 6.18.40 with commit de3bd9809af7555611334cb6a071806744430ef7 Issue introduced in 3.15 with commit 94b4f6c21cf54029377a0645675a9d81b6cf890d and fixed in 7.1.5 with commit f14802465f5956baafe5f4b4541eb626b06b41f1 Issue introduced in 3.15 with commit 94b4f6c21cf54029377a0645675a9d81b6cf890d and fixed in 7.2-rc1 with commit 4db86f8ab11b5a41bfc36680be837e6ac1375ec6 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-2026-72441 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/ieee802154/header_ops.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/a2ee1a038a16e286d084bc293a7522d010a59ec3 https://git.kernel.org/stable/c/09cfe665f2c5d7a8a5ed4d6b487434a011325368 https://git.kernel.org/stable/c/c88e687e44cb9c7690f5039a5a5941dba1f6a204 https://git.kernel.org/stable/c/71b5add66c51d6764325de5f2e300bbf4f39e7a6 https://git.kernel.org/stable/c/fc8766467b53335220b4b594ba15bc8f8cee0c76 https://git.kernel.org/stable/c/de3bd9809af7555611334cb6a071806744430ef7 https://git.kernel.org/stable/c/f14802465f5956baafe5f4b4541eb626b06b41f1 https://git.kernel.org/stable/c/4db86f8ab11b5a41bfc36680be837e6ac1375ec6