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 74E3658B6BB for ; Fri, 11 Sep 2026 19:57:26 +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=1789156657; cv=none; b=a7opZUtXHDaFlWPPp+2+SHWxnHj7et9gKNRQfW+3Rb0Eg+VVtV/TAP+Kk2RQPnyx8PokA0pvQVtVCrPYE1wcP3Oom4aIX0r8TmMEMbXrdFggUdNNYLF0mnL24jlDVLE9Up+yHUA0pWkVtg/MSICFC76igPLdd4nhHF3SIhFLLhU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789156657; c=relaxed/simple; bh=wFhSlGRIGiszJNiOnH1b46iwlIS++rd/60pYnEfJvfU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=GKJ5w822o90+FQwE8TUNsknQ0plRDJWuJkaYDUvdjuQrdnB3HcjJ8Iyuer4xBOOfQnekMOGV2w/bURlAlyK1uBw8shy7vdowWfuoC3fwcbuQYw6zzAeUr+O8kHbfANw0dSDIusP6Vq/1OvYq5LtcrItL4LA2vAYrKKslQDrCR+c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=hkxF1nVO; 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="hkxF1nVO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 509011F0089F; Fri, 11 Sep 2026 19:57:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789156639; bh=6SWTglp7HNiUEGlD9lho9YH6PHOaFipFNW/q/0s94UU=; h=From:To:Cc:Subject:Date:Reply-To; b=hkxF1nVOOtxhNzWndx3i8mfg0GV52maPsRqv+kPCp6DW/RdnwYYXoyP1w+qnY2PF2 J8F0fJP4q4QnSLuC3AlbhFL6pl2EtJuZ+DyPf7Rb6euZTvVTAJgJTGktLSig66KH+G KvpmKnxyxLtSBBap9deqalLDBr1xm6QbDuIQPfbA= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-89583: Bluetooth: eir: Fix OOB read in eir_get_service_data() Date: Fri, 11 Sep 2026 21:44:32 +0200 Message-ID: <2026091128-CVE-2026-89583-1a50@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=3253; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=LmbWPQTMofpzCf7ipuiDqI/38GRW0z5kkl9q7Xh4YMQ=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlLIjOfB7WptRcYmX965qLSmhNq+1SqgUPlRWSN6lz29 T3Cuas6YlkYBJkYZMUUWb5s4zm6v+KQopeh7WmYOaxMIEMYuDgFYCJfuBkWXLe9ev37rA/95fn7 ou845nmoTpZYybDguGq5nlZF3zome7NeW53zVfsqT1sAAA== 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: eir: Fix OOB read in eir_get_service_data() eir_get_service_data() walks the advertising data for a Service Data field with a matching UUID. On a mismatch it advances: eir += dlen; eir_len -= dlen; eir_get_data() reports dlen as the field's data length, but the field spans dlen + 2 bytes once its length and type bytes count, and more when non-Service-Data fields were skipped to reach it. The pointer lands correctly on the next field. eir_len does not, and the shortfall compounds across fields until eir_get_data() reads the length and type bytes of a "field" past the end of the buffer. For an ISO broadcast sink that buffer is hcon->le_per_adv_data[], filled from the periodic advertising reports of a remote broadcaster. A PA payload packed with mismatching Service Data fields walks off the array into the rest of struct hci_conn. A drifted field that matches the BAA UUID puts those bytes in iso_pi(sk)->base, where user space reads them back with getsockopt(BT_ISO_BASE). Recompute eir_len from the end of the buffer each iteration. The Linux kernel CVE team has assigned CVE-2026-89583 to this issue. Affected and fixed versions =========================== Issue introduced in 5.19 with commit 8f9ae5b3ae80f168a6224529e3787f4fb27f299a and fixed in 6.12.109 with commit 815fc98c227a78cbd93d4c29f2833705b7c2bc0f Issue introduced in 5.19 with commit 8f9ae5b3ae80f168a6224529e3787f4fb27f299a and fixed in 6.18.50 with commit c21fa79301d7d6ac0a4ec6c51e8ba10beaa08c50 Issue introduced in 5.19 with commit 8f9ae5b3ae80f168a6224529e3787f4fb27f299a and fixed in 7.2.4 with commit bb56e97bd67614238c1c0a4084704ccadbb875b4 Issue introduced in 5.19 with commit 8f9ae5b3ae80f168a6224529e3787f4fb27f299a and fixed in 7.3-rc1 with commit 4beb198bc59b242404a47c21990bc84165052c8a 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-2026-89583 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/eir.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/815fc98c227a78cbd93d4c29f2833705b7c2bc0f https://git.kernel.org/stable/c/c21fa79301d7d6ac0a4ec6c51e8ba10beaa08c50 https://git.kernel.org/stable/c/bb56e97bd67614238c1c0a4084704ccadbb875b4 https://git.kernel.org/stable/c/4beb198bc59b242404a47c21990bc84165052c8a