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 A1887348C77 for ; Sat, 15 Aug 2026 06:07:28 +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=1786774049; cv=none; b=ebckolZU1exWfFhfOMglVwKohXHDZC3/BKKaCu7dO1yUGSya5ykzpcDxEwNjCUr0T3+RwAhQE4UHASYtGCdv35vZcsiZnAe0ohSz6H+gN6LiHO3/gItBV5MjKCiyzzyrOCWwVOqP1KpME8Fo924V4QROJJH9xqONQ9WmdOEVK/c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786774049; c=relaxed/simple; bh=Ey8fjXl+tim9Zi1pKN2n5nNCyEuUga/58JInhAbVUdQ=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=YBNqPH5ZtgLdslfjT9Un0thp570Z78nSvaaU1Lq0eqMaAsMk1Wb+M1d2FlQd39HAlLsM9Y1Ac7r9iV1EOsw6cI2bFWVXTGDu7dtmaZ3mHz34SqxfAouFFqNw6QKssO2fkx21jSgy34sl56Haaqgok0dgDWKblb4sLIx8S0EuOk4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=vQeVCbOY; 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="vQeVCbOY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 02E741F000E9; Sat, 15 Aug 2026 06:07:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786774048; bh=K4n25TYmaNeJ9/clrQoU6ZlGuw57u5JoAAzck5smZzc=; h=From:To:Cc:Subject:Date:Reply-To; b=vQeVCbOYUQeaNfoJUrYlRpxku1eHkEeXfQ4JCb4/qkqmFZ3Mp+Hhve87L94o26qQA EOK9oDKoxoDcegQ1EaIU3T+U4IQLKYZWppnT3ZYF6j3wKuLk9qCp1IvgUCQF08+TJo lI3x1J1tbBsFFz5ZTaiwzpScAzl+fIG3RaVuUiMk= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-72022: llc: fix SAP refcount leak in llc_ui_autobind() Date: Sat, 15 Aug 2026 15:01:41 +0900 Message-ID: <2026081510-CVE-2026-72022-764c@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=3857; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=TqwzfyrYkk+yNFZpYQjVkhVhBt4aMxCL8Zj3GqDp6wI=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkNDMs4E1f6a0fpzEtKOftqt3f9J6Edzr76fwrWSWWu/ j3bPepXRywLgyATg6yYIsuXbTxH91ccUvQytD0NM4eVCWQIAxenAEzkmTXDgoXccctP1dse0swR uZ+9/NTyCxsP+zIsaNjr9KrqUY/Bt+pJ9bHVp2Qn5BRPBQA= 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: llc: fix SAP refcount leak in llc_ui_autobind() llc_ui_autobind() opens a SAP after choosing a dynamic LSAP. llc_sap_open() returns a reference owned by the caller, and llc_sap_add_socket() takes a second reference for the socket's membership in the SAP hash tables. llc_ui_bind() drops the caller's reference after adding the socket, but llc_ui_autobind() keeps it. When the socket is closed, llc_sap_remove_socket() releases only the socket reference, leaving the SAP on llc_sap_list with sk_count == 0. This is user-visible because repeated autobind and close cycles can consume all dynamic SAP values and make later autobinds fail with -EUSERS. Drop the caller's reference after a successful autobind, matching llc_ui_bind()'s ownership model. The Linux kernel CVE team has assigned CVE-2026-72022 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 5.10.261 with commit 79dc4b508e3f2649390a1f745f7657813e5938ec Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 5.15.212 with commit a2f9fa31ae021ef1fdcaf3ab17bd49f9223dd6a4 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.1.178 with commit b589a965184dde49c43b8caf5bcc65715a7b4ef2 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.6.145 with commit c7881b6088276601beaccb7440b8d56eab0d65ae Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.12.97 with commit b2fc9955ddc7c4ca03be44b995193bd6486c62e1 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.18.40 with commit 61a7ff4a62003b55a15022567486741b3bd83914 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 7.1.5 with commit 21a537606fe35be2b85971a5fd35c0023b6ef98f Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 7.2-rc3 with commit 660667cd406648bbaffbd5c0d897c2263a852f11 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-2026-72022 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/llc/af_llc.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/79dc4b508e3f2649390a1f745f7657813e5938ec https://git.kernel.org/stable/c/a2f9fa31ae021ef1fdcaf3ab17bd49f9223dd6a4 https://git.kernel.org/stable/c/b589a965184dde49c43b8caf5bcc65715a7b4ef2 https://git.kernel.org/stable/c/c7881b6088276601beaccb7440b8d56eab0d65ae https://git.kernel.org/stable/c/b2fc9955ddc7c4ca03be44b995193bd6486c62e1 https://git.kernel.org/stable/c/61a7ff4a62003b55a15022567486741b3bd83914 https://git.kernel.org/stable/c/21a537606fe35be2b85971a5fd35c0023b6ef98f https://git.kernel.org/stable/c/660667cd406648bbaffbd5c0d897c2263a852f11