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d="scan'208";a="501790531" Received: from rcdn-l-core-04.cisco.com ([173.37.255.141]) by rcdn-iport-8.cisco.com with ESMTP/TLS/TLS_AES_256_GCM_SHA384; 15 Jul 2026 17:19:10 +0000 Received: from bgl-ads-3413.cisco.com (bgl-ads-3413.cisco.com [173.39.60.50]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "ciscoit-managed-infra-smtp-auth.cisco.com", Issuer "Internal Private TLS SubCA" (verified OK)) by rcdn-l-core-04.cisco.com (Postfix) with ESMTPS id CCEE7180004BF for ; Wed, 15 Jul 2026 17:19:09 +0000 (GMT) Received: by bgl-ads-3413.cisco.com (Postfix, from userid 1795984) id E25DDCC037D; Wed, 15 Jul 2026 22:49:07 +0530 (IST) From: "Deepak Rathore -X (deeratho - E INFOCHIPS PRIVATE LIMITED at Cisco)" To: openembedded-devel@lists.openembedded.org Subject: [oe][meta-networking][wrynose][PATCH] mbedtls: set CVE_STATUS for CVE-2025-66442 Date: Wed, 15 Jul 2026 22:48:58 +0530 Message-Id: <20260715171858.1142328-1-deeratho@cisco.com> X-Mailer: git-send-email 2.35.6 MIME-Version: 1.0 X-Outbound-Client-TLS: VERIFIED;bgl-ads-3413.cisco.com [173.39.60.50];TLSv1.3;TLS_AES_256_GCM_SHA384;256;ciscoit-managed-infra-smtp-auth.cisco.com X-Outbound-SMTP-Client: 173.39.60.50, bgl-ads-3413.cisco.com X-Outbound-Node: rcdn-l-core-04.cisco.com List-Id: X-Webhook-Received: from 45-33-107-173.ip.linodeusercontent.com [45.33.107.173] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Wed, 15 Jul 2026 17:19:11 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-devel/message/128223 From: Deepak Rathore Analysis: - The Mbed TLS advisory states the issue occurs when LLVM select-optimize is enabled. [1] - The same advisory also states that Arm/x86 builds with MBEDTLS_HAVE_ASM enabled are not affected. The default mbedtls configuration in this branch enables MBEDTLS_HAVE_ASM. - NVD also describes the issue as occurring only with LLVM's select-optimize feature. [2] - The mbedtls recipes now evaluate the effective build flags across target, native, and nativesdk variants, handle the supported -mllvm spellings, and only mark the CVE unpatched when the vulnerable LLVM option combination is explicitly enabled and the Arm/x86 MBEDTLS_HAVE_ASM carve-out does not apply. - When those conditions are not met, the current mbedtls build configuration is not affected. - Hence ignoring/deferred the CVE for now. Reference: [1] https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-compiler-induced-constant-time-violations/ [2] https://nvd.nist.gov/vuln/detail/CVE-2025-66442 Signed-off-by: Deepak Rathore Signed-off-by: Khem Raj (cherry picked from commit 0eda0f3c556de7ab1c3b03b6f38eb9b4ac29a2d7) Signed-off-by: Deepak Rathore --- .../mbedtls/mbedtls_3.6.6.bb | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/meta-networking/recipes-connectivity/mbedtls/mbedtls_3.6.6.bb b/meta-networking/recipes-connectivity/mbedtls/mbedtls_3.6.6.bb index 23d5c0878f..865c9c2b68 100644 --- a/meta-networking/recipes-connectivity/mbedtls/mbedtls_3.6.6.bb +++ b/meta-networking/recipes-connectivity/mbedtls/mbedtls_3.6.6.bb @@ -56,8 +56,25 @@ ALTERNATIVE_LINK_NAME[hello] = "${bindir}/hello" BBCLASSEXTEND = "native nativesdk" +MBEDTLS_CVE_2025_66442_FLAGS = "${CFLAGS} ${CXXFLAGS} ${CPPFLAGS} ${TOOLCHAIN_OPTIONS}" +MBEDTLS_CVE_2025_66442_FLAGS:append:class-native = " ${BUILD_CFLAGS} ${BUILD_CXXFLAGS} ${BUILD_CPPFLAGS}" +MBEDTLS_CVE_2025_66442_FLAGS:append:class-nativesdk = " ${BUILDSDK_CFLAGS} ${BUILDSDK_CXXFLAGS} ${BUILDSDK_CPPFLAGS}" +MBEDTLS_CVE_2025_66442_ARCH = "${TARGET_ARCH}" +MBEDTLS_CVE_2025_66442_ARCH:class-native = "${BUILD_ARCH}" + CVE_PRODUCT = "mbed_tls" +CVE_STATUS[CVE-2025-66442] = "${@ \ + 'unpatched' if ( \ + ((('-mllvm' in d.getVar('MBEDTLS_CVE_2025_66442_FLAGS').split() and \ + ('--disable-select-optimize=false' in d.getVar('MBEDTLS_CVE_2025_66442_FLAGS').split() or \ + '-disable-select-optimize=false' in d.getVar('MBEDTLS_CVE_2025_66442_FLAGS').split())) or \ + '-mllvm=--disable-select-optimize=false' in d.getVar('MBEDTLS_CVE_2025_66442_FLAGS').split() or \ + '-mllvm=-disable-select-optimize=false' in d.getVar('MBEDTLS_CVE_2025_66442_FLAGS').split()) and \ + d.getVar('MBEDTLS_CVE_2025_66442_ARCH') not in ('aarch64', 'aarch64_be', 'arm', 'armeb', 'i586', 'i686', 'x86_64'))) \ + else 'not-applicable-config: CVE applies only when LLVM select-optimize is enabled and the Arm/x86 MBEDTLS_HAVE_ASM carve-out does not apply; current mbedtls build configuration does not meet those conditions' \ +}" + # Strip host paths from autogenerated test files do_compile:append() { sed -i 's+${S}/++g' ${B}/tests/*.c 2>/dev/null || :