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[meta-networking,wrynose,28/32] unbound: patch CVE-2026-55973

Message ID 20260910230932.173913-28-ankur.tyagi85@gmail.com
State Under Review
Delegated to: Anuj Mittal
Headers show
Series [meta-oe,wrynose,1/32] zabbix: ignore multiple CVEs | expand

Commit Message

Ankur Tyagi Sept. 10, 2026, 11:09 p.m. UTC 
From: Ankur Tyagi <ankur.tyagi85@gmail.com>

Details:
https://nvd.nist.gov/vuln/detail/cve-2026-55973

Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
---
 .../unbound/unbound/CVE-2026-55973.patch      | 47 +++++++++++++++++++
 .../recipes-support/unbound/unbound_1.24.2.bb |  1 +
 2 files changed, 48 insertions(+)
 create mode 100644 meta-networking/recipes-support/unbound/unbound/CVE-2026-55973.patch
diff mbox series

Patch

diff --git a/meta-networking/recipes-support/unbound/unbound/CVE-2026-55973.patch b/meta-networking/recipes-support/unbound/unbound/CVE-2026-55973.patch
new file mode 100644
index 0000000000..b463663af4
--- /dev/null
+++ b/meta-networking/recipes-support/unbound/unbound/CVE-2026-55973.patch
@@ -0,0 +1,47 @@ 
+From f7511787affcc7f1716f76dcc924c3880fc1f88a Mon Sep 17 00:00:00 2001
+From: "W.C.A. Wijngaards" <wouter@nlnetlabs.nl>
+Date: Wed, 22 Jul 2026 10:18:16 +0200
+Subject: [PATCH] - Fix CVE-2026-55973, 'dns-error-reporting: yes' leads to
+ stack buffer   overflow. Thanks to Qifan Zhang, Palo Alto Networks, for the
+ report.
+
+(cherry picked from commit 96f875552023c0ccf376ebe050519f12f3371dc9)
+
+CVE: CVE-2026-55973
+Upstream-Status: Backport [https://github.com/NLnetLabs/unbound/commit/96f875552023c0ccf376ebe050519f12f3371dc9]
+
+Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
+---
+ services/cache/dns.c | 2 ++
+ services/mesh.c      | 4 ++--
+ 2 files changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/services/cache/dns.c b/services/cache/dns.c
+index 121870ee3..cb241c6f9 100644
+--- a/services/cache/dns.c
++++ b/services/cache/dns.c
+@@ -259,6 +259,8 @@ find_closest_of_type(struct module_env* env, uint8_t* qname, size_t qnamelen,
+ 
+ 		/* snip off front label */
+ 		lablen = *qname;
++		if(lablen == 0)
++			break;
+ 		qname += lablen + 1;
+ 		qnamelen -= lablen + 1;
+ 	}
+diff --git a/services/mesh.c b/services/mesh.c
+index 191b1d488..432063c0d 100644
+--- a/services/mesh.c
++++ b/services/mesh.c
+@@ -1620,9 +1620,9 @@ static void dns_error_reporting(struct module_qstate* qstate,
+ 	opt = edns_opt_list_find(qstate->edns_opts_back_in,
+ 		LDNS_EDNS_REPORT_CHANNEL);
+ 	if(!opt) return;
+-	agent_domain_len = opt->opt_len;
+ 	agent_domain = opt->opt_data;
+-	if(dname_valid(agent_domain, agent_domain_len) < 3) {
++	agent_domain_len = dname_valid(agent_domain, opt->opt_len);
++	if(agent_domain_len < 3) {
+ 		/* The agent domain needs to be a valid dname that is not the
+ 		 * root; from RFC9567. */
+ 		return;
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 0af51973cd..b867ea9b73 100644
--- a/meta-networking/recipes-support/unbound/unbound_1.24.2.bb
+++ b/meta-networking/recipes-support/unbound/unbound_1.24.2.bb
@@ -38,6 +38,7 @@  SRC_URI = "git://github.com/NLnetLabs/unbound.git;protocol=https;branch=master;t
            file://CVE-2026-54478.patch \
            file://CVE-2026-55708.patch \
            file://CVE-2026-55717.patch \
+           file://CVE-2026-55973.patch \
            "
 
 SRCREV = "f6269baa605d31859f28770e01a24e3677e5f82c"