From nobody Thu Mar 26 01:11:18 2026 X-Original-To: dev-commits-src-all@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4fh5MB5wXYz6X3sN for ; Thu, 26 Mar 2026 01:11:18 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R12" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4fh5MB48hKz3FNg for ; Thu, 26 Mar 2026 01:11:18 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1774487478; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=LjUnC0OjkU0OSrlRFN8OqiyAOX8JIaVO7IFvYiYbzMk=; b=BSrmwg7HZX0GyvP95fpv8fD/H7bviC33COk8/dUjtYYeW0m8zdYFWP5ed4Q54nw4zrOGhU 6MiztdXU67wSuYjlKJpI1JhhEMfUNElH+J9/vKAL0kjvUommKIIMLCzvFYIfhjkI4ntAld 7gvPhXJ6enfouC4QO2EGJOQ7Rei8Q+09fpxrwhkfEhXpj7xNz0r2/D9UfV7ibosCVabDSF zB4E/KKsiWk4fFmeCQO6Gx2YQ6iH/b7AoluW22GxwEvQePBWhlm4FAO51QwHm7yBYksVi3 KbAZTt71vubJ5DyLxYI04k6J4wra5HXPbTHH4AS1tsdC31b8UInOmkoR8tH7Pw== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1774487478; a=rsa-sha256; cv=none; b=Ayia5W20b9U+qDyX5eipbaTjlEq3i30QuLNAK2ilrjphT/KjzbUI87pyo27qhBWAe0u+BI I0ZmaA/+dWuxFci4GFlTtdrc1nJCUiyG+7P2w+uuo/qU8u6OSGNzVoBG2zjX4iMnGstC9W MJnSG27IJDVvRsVt3LNOHi/DFWlo00YrT8FcKfsUnoYWnOC7k+MmEEQk32yfAv5Uy8kTZz va3egdSHRzCJJ03el0f27Vmy+qz2kz2BbRfaW6ohSteQauiaC55A0g07j7qpturBDPRtns U3UF7ULqsybhbj2zjLzqjLzxQhDfjYr7Qo1s6inRmtuWz6nI+1quqNckJmOHqA== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1774487478; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=LjUnC0OjkU0OSrlRFN8OqiyAOX8JIaVO7IFvYiYbzMk=; b=eumoPsEl9yvDtvASHCWB9rxDncS237ZBEGI3xxlwzlus5JadbeC+LIBr69dYNwQNjtbf8E +5mTzV5By4SrsF5eWm2y/9kdDP6x0NtzZkyHy6yyxlRu+ZEVlnBzBp22dpSs1S7qVEFgVp DgAtnlnV4NcufGP4JXoFVannTDRDxm1DnKuZywgapwtl42+3cHOPV+8LVJSvnLCz3myaSU TQBdazVRvvC7QQ/Wru6AfpVlwpiLJaX0TtUsVAtqqNX57C31VBgO7wLDgXmxOYeoce+hBM YTqG7ZxW7Q75QhJ1x9xJKYByWbkMl8xhgqcuCzBsOR0Z4fbtNsT/Ab5WPsjqzQ== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4fh5MB3fbfzVMZ for ; Thu, 26 Mar 2026 01:11:18 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from git (uid 1279) (envelope-from git@FreeBSD.org) id 18d17 by gitrepo.freebsd.org (DragonFly Mail Agent v0.13+ on gitrepo.freebsd.org); Thu, 26 Mar 2026 01:11:18 +0000 To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Cc: Michael Tuexen From: Philip Paeps Subject: git: de9e5d82581e - releng/15.0 - tcp: plug an mbuf leak List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-all@freebsd.org Sender: owner-dev-commits-src-all@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: philip X-Git-Repository: src X-Git-Refname: refs/heads/releng/15.0 X-Git-Reftype: branch X-Git-Commit: de9e5d82581ec1afd8d8da62a4cd8345ebae5564 Auto-Submitted: auto-generated Date: Thu, 26 Mar 2026 01:11:18 +0000 Message-Id: <69c487b6.18d17.527e7a93@gitrepo.freebsd.org> The branch releng/15.0 has been updated by philip: URL: https://cgit.FreeBSD.org/src/commit/?id=de9e5d82581ec1afd8d8da62a4cd8345ebae5564 commit de9e5d82581ec1afd8d8da62a4cd8345ebae5564 Author: Michael Tuexen AuthorDate: 2026-03-25 05:53:56 +0000 Commit: Philip Paeps CommitDate: 2026-03-25 06:50:41 +0000 tcp: plug an mbuf leak When a challenge ACK should be sent via tcp_send_challenge_ack(), but the rate limiter suppresses the sending, free the mbuf chain. The caller of tcp_send_challenge_ack() expects this similar to the callers of tcp_respond(). Approved by: so Security: FreeBSD-SA-26:06.tcp Security: CVE-2026-4247 Reviewed by: lstewart Tested by: lstewart Sponsored by: Netflix, Inc. --- sys/netinet/tcp_subr.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sys/netinet/tcp_subr.c b/sys/netinet/tcp_subr.c index b6f428b279b3..5e2b1eb1a86d 100644 --- a/sys/netinet/tcp_subr.c +++ b/sys/netinet/tcp_subr.c @@ -2202,6 +2202,8 @@ tcp_send_challenge_ack(struct tcpcb *tp, struct tcphdr *th, struct mbuf *m) tcp_respond(tp, mtod(m, void *), th, m, tp->rcv_nxt, tp->snd_nxt, TH_ACK); tp->last_ack_sent = tp->rcv_nxt; + } else { + m_freem(m); } }