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 D4395379C50 for ; Sun, 18 Oct 2026 15:18:42 +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=1792336723; cv=none; b=QsiqVaXzmAesSeDFtIbLobO3LqYRYV539X1lnBRRts/HveTcw973uGcGuCSYlm9DyEGRTR2zzGXP/h67MkENiwpPgs8qHEVxpyofH2+YennObP0Q3sbT1UfRchpQY4mSQ7i8snHse9ETSgkLYMKu2IpQaThwtDS2Me8hZ4y8FHk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792336723; c=relaxed/simple; bh=hlD6FF309xLNwl/qktJTUJ0MGFfElBjQN5VBvA6+hfI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=bT9tZ8M9q11InuSnnPurYHsCrgrmdpS7mk/PaRZr2P38fT5lAq+6kfsKWw1jszhuW/TJacr4l/8puYf+ZtCZuOB8PatQHhrT16bzyzQ6hcpeRsCzrvxSVhZ4AfYfg68IdZY7x2seNrUBdqz9aXrfGhhHKVBpOhHsYw7KoPQ/UeQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=aYh3OL5e; 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="aYh3OL5e" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 07A221F000C4; Sun, 18 Oct 2026 15:18:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1792336722; bh=7lb2LezZ6NkPlkbUpMzE1RE/DleHbxwoXj4flpSWdTw=; h=From:To:Cc:Subject:Date:Reply-To; b=aYh3OL5etwKHw5IPZYoVdDyHFwUeocDmZOqb9lS0Xidq4Q39dAyPn4TzrlKvR9XXu 8Ce9X1EdFMbbMYJ6c0UIlRrAZamogrlWcOONCQBx1IDMnho/Hi71/qQux3Z4SR0/KO iLVvP7OrP3lyBJP1m5prRLOSwsbvJNiTHXxVfdmw= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-98458: Bluetooth: ISO: release unused CIS holds after channel attach Date: Sun, 18 Oct 2026 17:15:22 +0200 Message-ID: <2026101810-CVE-2026-98458-ea41@gregkh> X-Mailer: git-send-email 2.56.0 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=3090; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=46GyESJ4cTmKTMCvijRUKliDYoIG9FOfnzBOR2VPXw0=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlXHtV55fg1Nl+R0Ztj1agpazePs/HGu5WXDn48fvt8i otlyN2NHbEsDIJMDLJiiixftvEc3V9xSNHL0PY0zBxWJpAhDFycAjARx0cMC/Y6XWNr+e90vGnG pfm1jNtKtfYdsWGYzZri+ORr3ZbrixOrI0WDAk8L1HMFAQA= 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: Bluetooth: ISO: release unused CIS holds after channel attach hci_bind_cis() and hci_connect_cis() return one hci_conn hold for the ISO layer. A new channel association consumes that hold, which is eventually released by iso_conn_free(). There are two cases where iso_chan_add() does not create an association: it returns success when the socket is already attached to the same iso_conn, and it returns -EBUSY when another socket is attached. The hold returned for the current call is unused in both cases. This occurs when deferred setup calls iso_connect_cis() again for its existing socket, or when another socket attempts to reuse the CIS. Detect the idempotent case while the connection is locked and release the unused hold after iso_chan_add(). Also release it on -EBUSY. Do not drop it for other errors: a newly allocated iso_conn releases the transferred hold when its last temporary reference is put. The Linux kernel CVE team has assigned CVE-2026-98458 to this issue. Affected and fixed versions =========================== Issue introduced in 6.6 with commit 69997d50ec574be816b4ee8f9cee52ebbd53f8bd and fixed in 6.12.113 with commit e0e8b70207eaf27aee0a05ec5bf2d1b6bcb004d1 Issue introduced in 6.6 with commit 69997d50ec574be816b4ee8f9cee52ebbd53f8bd and fixed in 6.18.55 with commit ed4c026cc4094dfb7a329b9d8df0ddd0be1b2458 Issue introduced in 6.6 with commit 69997d50ec574be816b4ee8f9cee52ebbd53f8bd and fixed in 7.2.9 with commit e5fcca51177f224604e3a8c926ffd5edbeb58b09 Issue introduced in 6.6 with commit 69997d50ec574be816b4ee8f9cee52ebbd53f8bd and fixed in 7.3-rc5 with commit 0fcd4dad555c96e0bd3a1b8c569f989be85c7341 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-2026-98458 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/bluetooth/iso.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/e0e8b70207eaf27aee0a05ec5bf2d1b6bcb004d1 https://git.kernel.org/stable/c/ed4c026cc4094dfb7a329b9d8df0ddd0be1b2458 https://git.kernel.org/stable/c/e5fcca51177f224604e3a8c926ffd5edbeb58b09 https://git.kernel.org/stable/c/0fcd4dad555c96e0bd3a1b8c569f989be85c7341