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([203.211.104.195]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39d98e602d8sm1265496a91.3.2026.09.10.16.11.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Sep 2026 16:11:08 -0700 (PDT) From: ankur.tyagi85@gmail.com To: openembedded-devel@lists.openembedded.org Cc: Ankur Tyagi Subject: [oe][meta-networking][wrynose][PATCH 31/32] unbound: patch CVE-2026-56416 Date: Fri, 11 Sep 2026 11:09:30 +1200 Message-ID: <20260910230932.173913-31-ankur.tyagi85@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260910230932.173913-1-ankur.tyagi85@gmail.com> References: <20260910230932.173913-1-ankur.tyagi85@gmail.com> MIME-Version: 1.0 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 ; Thu, 10 Sep 2026 23:11:18 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-devel/message/129949 From: Ankur Tyagi Details: https://nvd.nist.gov/vuln/detail/cve-2026-56416 Signed-off-by: Ankur Tyagi --- .../unbound/unbound/CVE-2026-56416.patch | 68 +++++++++++++++++++ .../recipes-support/unbound/unbound_1.24.2.bb | 1 + 2 files changed, 69 insertions(+) create mode 100644 meta-networking/recipes-support/unbound/unbound/CVE-2026-56416.patch diff --git a/meta-networking/recipes-support/unbound/unbound/CVE-2026-56416.patch b/meta-networking/recipes-support/unbound/unbound/CVE-2026-56416.patch new file mode 100644 index 0000000000..6002c44924 --- /dev/null +++ b/meta-networking/recipes-support/unbound/unbound/CVE-2026-56416.patch @@ -0,0 +1,68 @@ +From 984cbdd8761685087f1e20d6e9d9da12d7412916 Mon Sep 17 00:00:00 2001 +From: "W.C.A. Wijngaards" +Date: Wed, 22 Jul 2026 10:19:28 +0200 +Subject: [PATCH] - Fix CVE-2026-56416, Possible heap buffer overflow when + validator canonicalizes RDATA that contains domain name. Thanks to Qifan + Zhang, Palo Alto Networks, for the report. + +(cherry picked from commit 4b1635e19406fd8040806f0fa4a4488c003b5d0d) + +CVE: CVE-2026-56416 +Upstream-Status: Backport [https://github.com/NLnetLabs/unbound/commit/4b1635e19406fd8040806f0fa4a4488c003b5d0d] + +Signed-off-by: Ankur Tyagi +--- + util/data/msgparse.c | 3 +++ + validator/val_sigcrypt.c | 11 +++++++---- + 2 files changed, 10 insertions(+), 4 deletions(-) + +diff --git a/util/data/msgparse.c b/util/data/msgparse.c +index 3dc2e1264..9d3ddda7a 100644 +--- a/util/data/msgparse.c ++++ b/util/data/msgparse.c +@@ -687,6 +687,9 @@ calc_size(sldns_buffer* pkt, uint16_t type, struct rr_parse* rr) + } + rdf++; + } ++ /* rdata ended before all _dname_count names were seen */ ++ if(count != 0) ++ return 0; /* the rdata is too short. */ + } + /* remaining rdata */ + rr->size += pkt_len; +diff --git a/validator/val_sigcrypt.c b/validator/val_sigcrypt.c +index 86de6fb8e..cde281870 100644 +--- a/validator/val_sigcrypt.c ++++ b/validator/val_sigcrypt.c +@@ -1094,6 +1094,7 @@ canonicalize_rdata(sldns_buffer* buf, struct ub_packed_rrset_key* rrset, + size_t len) + { + uint8_t* datstart = sldns_buffer_current(buf)-len+2; ++ size_t firstlen; + switch(ntohs(rrset->rk.type)) { + case LDNS_RR_TYPE_NXT: + case LDNS_RR_TYPE_NS: +@@ -1113,8 +1114,9 @@ canonicalize_rdata(sldns_buffer* buf, struct ub_packed_rrset_key* rrset, + case LDNS_RR_TYPE_SOA: + /* two names after another */ + query_dname_tolower(datstart); +- query_dname_tolower(datstart + +- dname_valid(datstart, len-2)); ++ firstlen = dname_valid(datstart, len-2); ++ if(firstlen && firstlen < len-2) ++ query_dname_tolower(datstart + firstlen); + return; + case LDNS_RR_TYPE_RT: + case LDNS_RR_TYPE_AFSDB: +@@ -1141,8 +1143,9 @@ canonicalize_rdata(sldns_buffer* buf, struct ub_packed_rrset_key* rrset, + return; + datstart += 2; + query_dname_tolower(datstart); +- query_dname_tolower(datstart + +- dname_valid(datstart, len-2-2)); ++ firstlen = dname_valid(datstart, len-2-2); ++ if(firstlen && firstlen < len-2-2) ++ query_dname_tolower(datstart + firstlen); + return; + case LDNS_RR_TYPE_NAPTR: + if(len < 2+4) diff --git a/meta-networking/recipes-support/unbound/unbound_1.24.2.bb b/meta-networking/recipes-support/unbound/unbound_1.24.2.bb index af848988aa..516ea20654 100644 --- a/meta-networking/recipes-support/unbound/unbound_1.24.2.bb +++ b/meta-networking/recipes-support/unbound/unbound_1.24.2.bb @@ -41,6 +41,7 @@ SRC_URI = "git://github.com/NLnetLabs/unbound.git;protocol=https;branch=master;t file://CVE-2026-55973.patch \ file://CVE-2026-55990.patch \ file://CVE-2026-55991.patch \ + file://CVE-2026-56416.patch \ " SRCREV = "f6269baa605d31859f28770e01a24e3677e5f82c"