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 56B1D38D3F8 for ; Sun, 19 Jul 2026 14:07:46 +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=1784470067; cv=none; b=eKNWXLckL/M8mrgMtfbSFFluT5dm+k5IW99ihvWeKh51oT6eCRVrrm6sNgf6QjIibqv135nKTOcG8WjwZnhXHcBXqzVD5k+XT7R82YzpMg+NQSrObJP7wh1poNxAM34emsmTcrn61+EzVILlHWfV/bqJsKaN3u3WXWr703Lrjrs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784470067; c=relaxed/simple; bh=LDQsvwn3Tf4uOAWmdz5TSRdjvGwUpqrU507X9IvS/Vg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=RYpVREFGAKIZR52asOGAU58Bj8p15nW31yLon6cLy7ITRGVf9HlMABggPjSmPqZNEoB0yt3k34buf1egrHs/JajwbD8areQXN5uAX0rgbr7aepePcPyvW+PqORxqlnF7WIrQlrY/WTH1zDcy6VZO/uwgspPqKoPYxz+3HHb41Mg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=TeXxlSHn; 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="TeXxlSHn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9ECF31F000E9; Sun, 19 Jul 2026 14:07:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784470066; bh=6ggrU6gs9bMl/BOJTgHH288tM0dyQn7IUjR+DoX9U3s=; h=From:To:Cc:Subject:Date:Reply-To; b=TeXxlSHnjyQWITXMy83J103BKD082fL8Ufq9MrLFdih3QC4uZAUM+9/5LwSTPFdW9 GHd1qlZ96myLnJjvehsr6NR70eMIsgRX3gPWhp9I73r1j1ShzwqU1gWZM5TBsXwXS1 afjiH2uREWmTSi5TKhhZ2v7mH2eZscnzfPv1sWGA= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-63864: bpf: Propagate error from visit_tailcall_insn Date: Sun, 19 Jul 2026 16:03:54 +0200 Message-ID: <2026071934-CVE-2026-63864-e441@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=1880; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=SkgGeK2nOcP6GU8IgwN18ixkfPvkkANr7a6XobqNFJk=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkxN80qfnma2EU6H7h8977styPutcZKrZu2qx+4du2a9 5mD9q72HbEsDIJMDLJiiixftvEc3V9xSNHL0PY0zBxWJpAhDFycAjCR7BMMC3qsjBlkNmx4KjBT dlPcVFE+k3DekwzzrOuXCMQqzwybKL50ksvbPruZl280AgA= 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: Propagate error from visit_tailcall_insn Commit e40f5a6bf88a ("bpf: correct stack liveness for tail calls") added visit_tailcall_insn() but did not check its return value. The Linux kernel CVE team has assigned CVE-2026-63864 to this issue. Affected and fixed versions =========================== Issue introduced in 6.19 with commit e40f5a6bf88a781d5f81bc6b8aab9ac31d8c98dd and fixed in 7.0.10 with commit 945816e63c8677cf4bfde963a0774432ce8afc85 Issue introduced in 6.19 with commit e40f5a6bf88a781d5f81bc6b8aab9ac31d8c98dd and fixed in 7.1 with commit 6bd96e40f31dde8f8cd79772b4df0f171cf8a915 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-2026-63864 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/verifier.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/945816e63c8677cf4bfde963a0774432ce8afc85 https://git.kernel.org/stable/c/6bd96e40f31dde8f8cd79772b4df0f171cf8a915