diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc
index f973c0a8d1..73b2f3e607 100644
--- a/meta/recipes-devtools/qemu/qemu.inc
+++ b/meta/recipes-devtools/qemu/qemu.inc
@@ -50,6 +50,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
            file://CVE-2024-6519.patch \
            file://CVE-2025-14876_p1.patch \
            file://CVE-2025-14876_p2.patch \
+           file://CVE-2026-0665.patch \
            "
 UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"
 
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2026-0665.patch b/meta/recipes-devtools/qemu/qemu/CVE-2026-0665.patch
new file mode 100644
index 0000000000..9264ba38cc
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2026-0665.patch
@@ -0,0 +1,38 @@
+From 91e98ce0a879010ef5b5ab5778cc71c0e9e92a57 Mon Sep 17 00:00:00 2001
+From: Vulnerability Report <vr@darknavy.com>
+Date: Fri, 9 Jan 2026 10:35:48 +0800
+Subject: [PATCH] hw/i386/kvm: fix PIRQ bounds check in xen_physdev_map_pirq()
+
+Reject pirq == s->nr_pirqs in xen_physdev_map_pirq().
+
+CVE: CVE-2026-0665
+Upstream-Status: Backport [https://gitlab.com/qemu-project/qemu/-/commit/4ba877461e6b1a8637b15ff1a8c77ba97639c927]
+
+Fixes: aa98ee38a5 ("hw/xen: Implement emulated PIRQ hypercall support")
+Fixes: CVE-2026-0665
+Reported-by: DARKNAVY (@DarkNavyOrg) <vr@darknavy.com>
+Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
+Signed-off-by: Vulnerability Report <vr@darknavy.com>
+Link: https://lore.kernel.org/r/13FE03BE60EA78D6+20260109023548.4047-1-vr@darknavy.com
+Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
+(cherry picked from commit c7504ba2a560fd884557f6e5142f03b491aad0c7)
+Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
+(cherry picked from commit 4ba877461e6b1a8637b15ff1a8c77ba97639c927)
+Signed-off-by: Ashishkumar Parmar <asparmar@cisco.com>
+---
+ hw/i386/kvm/xen_evtchn.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c
+index 02b8cbf8d..5a1ad3782 100644
+--- a/hw/i386/kvm/xen_evtchn.c
++++ b/hw/i386/kvm/xen_evtchn.c
+@@ -1843,7 +1843,7 @@ int xen_physdev_map_pirq(struct physdev_map_pirq *map)
+             return pirq;
+         }
+         map->pirq = pirq;
+-    } else if (pirq > s->nr_pirqs) {
++    } else if (pirq >= s->nr_pirqs) {
+         return -EINVAL;
+     } else {
+         /*