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15.21.0071.010; Mon, 1 Jun 2026 20:00:00 +0000 From: Abhishek Bachiphale To: openembedded-core@lists.openembedded.org Subject: [PATCH 5/6][wrynose] cups: fix CVE-2026-39314 Date: Tue, 2 Jun 2026 01:28:00 +0530 Message-Id: <20260601195801.4008899-6-Abhishek.Bachiphale@windriver.com> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20260601195801.4008899-1-Abhishek.Bachiphale@windriver.com> References: <20260601195801.4008899-1-Abhishek.Bachiphale@windriver.com> X-ClientProxiedBy: TY4PR01CA0094.jpnprd01.prod.outlook.com (2603:1096:405:37d::18) To IA0PR11MB8399.namprd11.prod.outlook.com (2603:10b6:208:48d::9) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: IA0PR11MB8399:EE_|SJ5PPF8F93806F5:EE_ X-MS-Office365-Filtering-Correlation-Id: 960b84d5-a6e0-4d39-714a-08dec0185ce9 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: 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[45.33.107.173] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Mon, 01 Jun 2026 20:00:13 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/237993 In CUPS versions 2.4.16 and prior, an integer underflow exists in _ppdCreateFromIPP() (cups/ppd-cache.c). A local unprivileged user can supply a negative job-password-supported IPP attribute. The bounds check only caps the upper bound, so a negative value passes validation, is cast to size_t (wrapping to ~2^64), and is used as the length argument to memset() on a 33-byte stack buffer. This causes an immediate SIGSEGV in the cupsd root process. Combined with systemd's Restart=on-failure, an attacker can repeat the crash for sustained denial of service. Apply upstream fix to validate negative values and prevent integer underflow in _ppdCreateFromIPP(). Signed-off-by: Abhishek Bachiphale --- meta/recipes-extended/cups/cups.inc | 1 + .../cups/cups/CVE-2026-39314.patch | 47 +++++++++++++++++++ 2 files changed, 48 insertions(+) create mode 100644 meta/recipes-extended/cups/cups/CVE-2026-39314.patch diff --git a/meta/recipes-extended/cups/cups.inc b/meta/recipes-extended/cups/cups.inc index 42107774e4..a12965bb6e 100644 --- a/meta/recipes-extended/cups/cups.inc +++ b/meta/recipes-extended/cups/cups.inc @@ -19,6 +19,7 @@ SRC_URI = "${GITHUB_BASE_URI}/download/v${PV}/cups-${PV}-source.tar.gz \ file://CVE-2026-34979.patch \ file://CVE-2026-34980.patch \ file://CVE-2026-34990.patch \ + file://CVE-2026-39314.patch \ " GITHUB_BASE_URI = "https://github.com/OpenPrinting/cups/releases" diff --git a/meta/recipes-extended/cups/cups/CVE-2026-39314.patch b/meta/recipes-extended/cups/cups/CVE-2026-39314.patch new file mode 100644 index 0000000000..8d25a1c2e3 --- /dev/null +++ b/meta/recipes-extended/cups/cups/CVE-2026-39314.patch @@ -0,0 +1,47 @@ +From 928a86b1b794f738f0a3dc87561b2e054bff7ce4 Mon Sep 17 00:00:00 2001 +From: Michael R Sweet +Date: Sun, 5 Apr 2026 10:45:25 -0400 +Subject: [PATCH] Range check job-password-supported. + +OpenPrinting CUPS is an open source printing system for Linux and other +Unix-like operating systems. In versions 2.4.16 and prior, an integer +underflow vulnerability in _ppdCreateFromIPP() (cups/ppd-cache.c) allows +any unprivileged local user to crash the cupsd root process by supplying +a negative job-password-supported IPP attribute. The bounds check only +caps the upper bound, so a negative value passes validation, is cast to +size_t (wrapping to ~2^64), and is used as the length argument to +memset() on a 33-byte stack buffer. This causes an immediate SIGSEGV in +the cupsd root process. Combined with systemd's Restart=on-failure, an +attacker can repeat the crash for sustained denial of service. + +CVE: CVE-2026-39314 + +Upstream-Status: Backport [ https://github.com/OpenPrinting/cups/commit/928a86b1b794f738f0a3dc87561b2e054bff7ce4 ] + +Signed-off-by: Abhishek Bachiphale +--- + cups/ppd-cache.c | 4 ++-- + 1 file changed, 3 insertions(+), 2 deletions(-) + +diff --git a/cups/ppd-cache.c b/cups/ppd-cache.c +index f5386532ca..ef6caa28a7 100644 +--- a/cups/ppd-cache.c ++++ b/cups/ppd-cache.c +@@ -1,7 +1,7 @@ + /* + * PPD cache implementation for CUPS. + * +- * Copyright © 2022-2025 by OpenPrinting. ++ * Copyright © 2022-2026 by OpenPrinting. + * Copyright © 2010-2021 by Apple Inc. + * + * Licensed under Apache License v2.0. See the file "LICENSE" for more +@@ -3530,7 +3530,7 @@ _ppdCreateFromIPP2( + * Password/PIN printing... + */ + +- if ((attr = ippFindAttribute(supported, "job-password-supported", IPP_TAG_INTEGER)) != NULL) ++ if ((attr = ippFindAttribute(supported, "job-password-supported", IPP_TAG_INTEGER)) != NULL && ippGetInteger(attr, 0) > 0) + { + char pattern[33]; /* Password pattern */ + int maxlen = ippGetInteger(attr, 0);