diff --git a/meta/recipes-multimedia/alsa/alsa-lib/CVE-2026-90781.patch b/meta/recipes-multimedia/alsa/alsa-lib/CVE-2026-90781.patch
new file mode 100644
index 0000000000..b2b2ce84cf
--- /dev/null
+++ b/meta/recipes-multimedia/alsa/alsa-lib/CVE-2026-90781.patch
@@ -0,0 +1,41 @@
+From f84cd4ced7b36fddb8e4ee24404cf7c091d27020 Mon Sep 17 00:00:00 2001
+From: Jaroslav Kysela <perex@perex.cz>
+Date: Sun, 30 Aug 2026 20:20:30 +0200
+Subject: [PATCH] control: ctlparse - another fix for one-byte overrrun in
+ __snd_ctl_ascii_elem_id_parse
+
+Follows 1e27d63ef6d1dcf7d1f1a1e1eca3ea779e7de377 .
+
+Link: https://lore.kernel.org/alsa-devel/CACBQ=P2FhO3M6dkv3cWuKb6Qhs92ouV+FJ3SJZ_PVBSSdJWRAQ@mail.gmail.com/
+Reported-by: Harsh Raj Singhania <raj.harshraut@gmail.com>
+Signed-off-by: Jaroslav Kysela <perex@perex.cz>
+
+CVE: CVE-2026-90781
+Upstream-Status: Backport [https://github.com/alsa-project/alsa-lib/commit/f84cd4ced7b36fddb8e4ee24404cf7c091d27020]
+Signed-off-by: Peter Marko <peter.marko@siemens.com>
+---
+ src/control/ctlparse.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/control/ctlparse.c b/src/control/ctlparse.c
+index c40de2bd..7132210e 100644
+--- a/src/control/ctlparse.c
++++ b/src/control/ctlparse.c
+@@ -207,7 +207,7 @@ int __snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str,
+ 			if (*str == '\'' || *str == '\"') {
+ 				c = *str++;
+ 				while (*str && *str != c) {
+-					if (size < (int)sizeof(buf)) {
++					if (size < (int)sizeof(buf) - 1) {
+ 						*ptr++ = *str;
+ 						size++;
+ 					}
+@@ -217,7 +217,7 @@ int __snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str,
+ 					str++;
+ 			} else {
+ 				while (*str && *str != ',') {
+-					if (size < (int)sizeof(buf)) {
++					if (size < (int)sizeof(buf) - 1) {
+ 						*ptr++ = *str;
+ 						size++;
+ 					}
diff --git a/meta/recipes-multimedia/alsa/alsa-lib_1.2.15.3.bb b/meta/recipes-multimedia/alsa/alsa-lib_1.2.15.3.bb
index 04976f3bf7..3081a522cb 100644
--- a/meta/recipes-multimedia/alsa/alsa-lib_1.2.15.3.bb
+++ b/meta/recipes-multimedia/alsa/alsa-lib_1.2.15.3.bb
@@ -12,6 +12,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=a916467b91076e631dd8edb7424769c7 \
 SRC_URI = "https://www.alsa-project.org/files/pub/lib/${BP}.tar.bz2"
 SRC_URI += "file://CVE-2026-25068.patch"
 SRC_URI += "file://CVE-2026-56109.patch"
+SRC_URI += "file://CVE-2026-90781.patch"
 SRC_URI[sha256sum] = "7b079d614d582cade7ab8db2364e65271d0877a37df8757ac4ac0c8970be861e"
 
 inherit autotools pkgconfig