diff --git a/meta-oe/recipes-support/hdf5/files/CVE-2025-2309.patch b/meta-oe/recipes-support/hdf5/files/CVE-2025-2309.patch
new file mode 100644
index 0000000000..d14cb2589f
--- /dev/null
+++ b/meta-oe/recipes-support/hdf5/files/CVE-2025-2309.patch
@@ -0,0 +1,41 @@
+From 6b24925c5fae3e2d7f47e9e7c879816673a48cd5 Mon Sep 17 00:00:00 2001
+From: Libo Chen <libo.chen.cn@windriver.com>
+Date: Fri, 30 Jan 2026 15:04:26 +0800
+Subject: [PATCH] Fix CVE-2025-2309
+
+A malformed file can trigger bit field type conversions that can (due to missing boundary checks in the conversion step) cause a heap buffer overflow. This PR adds a check on the defined conversion to ensure it does not read beyond the size of a single bit field element. Thus, H5T__bit_copy does not result in a buffer overflow. There are several other calls to H5T__bit_copy which might be subject to a similar issue.
+
+This PR fixes CVE-2025-2309.
+
+CVE: CVE-2025-2309
+
+Upstream-Status: Backport [https://github.com/HDFGroup/hdf5/commit/9d90b21ef5c5373978014f1a711795aa653bd9a1]
+
+Signed-off-by: Libo Chen <libo.chen.cn@windriver.com>
+---
+ src/H5Odtype.c | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+diff --git a/src/H5Odtype.c b/src/H5Odtype.c
+index 24671b0..085ce24 100644
+--- a/src/H5Odtype.c
++++ b/src/H5Odtype.c
+@@ -307,6 +307,15 @@ H5O__dtype_decode_helper(unsigned *ioflags /*in,out*/, const uint8_t **pp, H5T_t
+                 HGOTO_ERROR(H5E_OHDR, H5E_OVERFLOW, FAIL, "ran off end of input buffer while decoding");
+             UINT16DECODE(*pp, dt->shared->u.atomic.offset);
+             UINT16DECODE(*pp, dt->shared->u.atomic.prec);
++
++            /* Sanity checks */
++            if (dt->shared->u.atomic.offset >= (dt->shared->size * 8))
++                HGOTO_ERROR(H5E_DATATYPE, H5E_BADRANGE, FAIL, "bitfield offset out of bounds");
++            if (0 == dt->shared->u.atomic.prec)
++                HGOTO_ERROR(H5E_DATATYPE, H5E_BADVALUE, FAIL, "bitfield precision is zero");
++            if (((dt->shared->u.atomic.offset + dt->shared->u.atomic.prec) - 1) >= (dt->shared->size * 8))
++                HGOTO_ERROR(H5E_DATATYPE, H5E_BADRANGE, FAIL, "bitfield offset+precision out of bounds");
++
+             break;
+ 
+         case H5T_OPAQUE: {
+-- 
+2.34.1
+
diff --git a/meta-oe/recipes-support/hdf5/hdf5_1.14.4-3.bb b/meta-oe/recipes-support/hdf5/hdf5_1.14.4-3.bb
index 5a834bd4e3..ca1e8d7076 100644
--- a/meta-oe/recipes-support/hdf5/hdf5_1.14.4-3.bb
+++ b/meta-oe/recipes-support/hdf5/hdf5_1.14.4-3.bb
@@ -27,6 +27,7 @@ SRC_URI = " \
     file://CVE-2025-2153.patch \
     file://CVE-2025-2310.patch \
     file://CVE-2025-44905.patch \
+    file://CVE-2025-2309.patch \
 "
 SRC_URI[sha256sum] = "019ac451d9e1cf89c0482ba2a06f07a46166caf23f60fea5ef3c37724a318e03"