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 1A1C84EB873 for ; Thu, 17 Sep 2026 16:39:48 +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=1789663191; cv=none; b=Tv3IT9CJTVGXB6MqTqYzXCGYOgMMwLdjtrXTg/O1myxSJW0ZeAP1FAzeUb3sGCpyuvjn/V/5UZBAp7m8OxLt9JGcm5MywcsV/WYjLyK1WtZe5+MqJrKY5bn9gTKN622izcae8tl6hYSo5ADMfqiiJGRE9EQrejamA/aLQlKzR3Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789663191; c=relaxed/simple; bh=uH+HbXTVxJBlHO1ihAclHxGgQFUfb6e6h3Uk+vvE4tk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=AQ7ll0nwLntkl6j1X5W/YwAYoxqaKpjTsUnD5HXlfChzJhkmDRZIUKbbzPXayQNT1CDikx7AtDXQjbZcU6G9zr92x3rLc+QPw0puaQtMO0crU1f71rMSCt9aPOb18QjWQFYZwnGvDTlw6+FeDGwpRqsI3q6Ee1kbdbygXYNITBg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=D4OTecTF; 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="D4OTecTF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2AE331F0089A; Thu, 17 Sep 2026 16:39:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789663188; bh=3N90PoWHF0X5Z9jgiSlTWIa7hjIoiJLC0bpqQRAgIp8=; h=From:To:Cc:Subject:Date:Reply-To; b=D4OTecTFsxC7p6AUUBpywkyg5e8aLf+e1lJidtxCQmm8idshcTFxAMU9ImIz7F0ag vwKIcvixcs1P+fu8lzEyj1PN6wippvaMWzRTZjrQF/zgmk0EqmEZbfWh57eZ4NnDQc 3XERPpwDRbj/pP9IO6tXXQ/hEzWz0L7tgqSmiRFU= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-93111: bpf: Mark tracing_multi trampolines as ftrace managed Date: Thu, 17 Sep 2026 17:16:28 +0100 Message-ID: <2026091747-CVE-2026-93111-e862@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=2272; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=OJm0Flv60U6/V7tzxNCykpf5ZEn2N0q9qQIqlzKEznM=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlrBE5v0TPbXS/y4u/jVyWLU5Zr8OZ4HUisqFsZu4NF9 IBpkc3CjlgWBkEmBlkxRZYv23iO7q84pOhlaHsaZg4rE8gQBi5OAZjIt+kMC07+Ml1jNi/4wZnS ZbeN7mr9toy7x8ow36Wr2nrCq2gbtWN/r5jrLnlevbx8KgA= 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: bpf: Mark tracing_multi trampolines as ftrace managed Since tracing_multi link does not set ftrace_managed, it would fail to release the tracing_multi link when attaching tracing_multi link and then attaching fentry link. [ 3.714215] WARNING: kernel/bpf/trampoline.c:1727 at bpf_trampoline_multi_detach+0x20b/0x240, CPU#1: test_progs/97 ... [ 3.733170] bpf_tracing_multi_link_release+0x14/0x30 [ 3.733890] bpf_link_free+0x58/0x130 [ 3.734414] bpf_link_release+0x23/0x30 Fix it by setting 'ftrace_managed = true' in register_fentry_multi(). The Linux kernel CVE team has assigned CVE-2026-93111 to this issue. Affected and fixed versions =========================== Issue introduced in 7.2 with commit aef4dfa790b22d8052cfb78044eadbe03c876c39 and fixed in 7.2.6 with commit 280145253fd38fa975cc04963ddaf74c7f415011 Issue introduced in 7.2 with commit aef4dfa790b22d8052cfb78044eadbe03c876c39 and fixed in 7.3-rc1 with commit 30bdd6d1384d894931f113eb595636092d8e650c 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-2026-93111 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: kernel/bpf/trampoline.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/280145253fd38fa975cc04963ddaf74c7f415011 https://git.kernel.org/stable/c/30bdd6d1384d894931f113eb595636092d8e650c