unbound: patch CVE-2026-44687

Details:
https://nvd.nist.gov/vuln/detail/cve-2026-44687

Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
Signed-off-by: Anuj Mittal <anuj.mittal@oss.qualcomm.com>

meta-networking/recipes-support/unbound/unbound/CVE-2026-44687.patch

@@ -0,0 +1,31 @@
+From ac34bce07f66a96baf85e3f25f99623b08b6dd86 Mon Sep 17 00:00:00 2001
+From: "W.C.A. Wijngaards" <wouter@nlnetlabs.nl>
+Date: Wed, 22 Jul 2026 10:12:03 +0200
+Subject: [PATCH] - Fix CVE-2026-44687, Off-by-one error in
+ 'harden-below-nxdomain'   logic can shadow a stub/forward zone by a
+ legitimate parent's   NXDOMAIN. Thanks to Qifan Zhang, Palo Alto Networks,
+ for the report.
+
+(cherry picked from commit 1e1940383ab5ee655fe7fac0da606fe59c76ce86)
+
+CVE: CVE-2026-44687
+Upstream-Status: Backport [https://github.com/NLnetLabs/unbound/commit/1e1940383ab5ee655fe7fac0da606fe59c76ce86]
+
+Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
+---
+ services/cache/dns.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/services/cache/dns.c b/services/cache/dns.c
+index 8dae2ffcc..121870ee3 100644
+--- a/services/cache/dns.c
++++ b/services/cache/dns.c
+@@ -1019,7 +1019,7 @@ dns_cache_lookup(struct module_env* env,
+ 	if(env->cfg->harden_below_nxdomain) {
+ 		while(!dname_is_root(k.qname)) {
+ 			if(dpname && dpnamelen
+-				&& !dname_subdomain_c(k.qname, dpname))
++				&& !dname_strict_subdomain_c(k.qname, dpname))
+ 				break; /* no synth nxdomain above the stub */
+ 			dname_remove_label(&k.qname, &k.qname_len);
+ 			h = query_info_hash(&k, flags);

meta-networking/recipes-support/unbound/unbound_1.24.2.bb

@@ -27,6 +27,7 @@ SRC_URI = "git://github.com/NLnetLabs/unbound.git;protocol=https;branch=master;t
            file://CVE-2026-32665.patch \
            file://CVE-2026-42955.patch \
            file://CVE-2026-44621.patch \
+           file://CVE-2026-44687.patch \
            "
 
 SRCREV = "f6269baa605d31859f28770e01a24e3677e5f82c"