diff --git a/meta/recipes-devtools/python/python3/CVE-2026-9669.patch b/meta/recipes-devtools/python/python3/CVE-2026-9669.patch
new file mode 100644
index 000000000000..933d6f410ee1
--- /dev/null
+++ b/meta/recipes-devtools/python/python3/CVE-2026-9669.patch
@@ -0,0 +1,97 @@
+From 5b412e1f7bdb3e0667b2bc8b216ad216d59d8373 Mon Sep 17 00:00:00 2001
+From: "Miss Islington (bot)"
+ <31488909+miss-islington@users.noreply.github.com>
+Date: Mon, 8 Jun 2026 11:55:32 +0200
+Subject: [PATCH] gh-150599: Prevent bz2 decompressor reuse after errors
+ (GH-150600)
+
+CVE: CVE-2026-9669
+Upstream-Status: Backport [https://github.com/python/cpython/commit/5755d0f083949ff3c5bf3a37e673e24e306b036e]
+
+Signed-off-by: Benjamin Robin <benjamin.robin@bootlin.com>
+---
+ Lib/test/test_bz2.py | 15 +++++++++++++++
+ Modules/_bz2module.c | 18 +++++++++++++++---
+ 2 files changed, 30 insertions(+), 3 deletions(-)
+
+diff --git a/Lib/test/test_bz2.py b/Lib/test/test_bz2.py
+index cb730a1a46e2..dcbf6a298264 100644
+--- a/Lib/test/test_bz2.py
++++ b/Lib/test/test_bz2.py
+@@ -958,6 +958,21 @@ def test_failure(self):
+         # Previously, a second call could crash due to internal inconsistency
+         self.assertRaises(Exception, bzd.decompress, self.BAD_DATA * 30)
+
++    def test_decompress_after_data_error(self):
++        data = bytes.fromhex(
++            "425a6839314159265359000000000000007fffff000000000000000000000000"
++            "00000000000000000000000000000000000000e0370000000000000000000000"
++            "000000000000000000000000000000000000000000000000000083f3"
++        )
++        bzd = BZ2Decompressor()
++        with self.assertRaisesRegex(OSError, "Invalid data stream"):
++            bzd.decompress(data)
++        # Previously, a second call could crash due to internal inconsistency
++        self.assertFalse(bzd.needs_input)
++        self.assertFalse(bzd.eof)
++        with self.assertRaisesRegex(ValueError, "previous error"):
++            bzd.decompress(b'\x00' * 18)
++
+     @support.refcount_test
+     def test_refleaks_in___init__(self):
+         gettotalrefcount = support.get_attribute(sys, 'gettotalrefcount')
+diff --git a/Modules/_bz2module.c b/Modules/_bz2module.c
+index 97bd44b4ac96..0b0916142f57 100644
+--- a/Modules/_bz2module.c
++++ b/Modules/_bz2module.c
+@@ -114,6 +114,7 @@ typedef struct {
+ typedef struct {
+     PyObject_HEAD
+     bz_stream bzs;
++    int bzerror;
+     char eof;           /* T_BOOL expects a char */
+     PyObject *unused_data;
+     char needs_input;
+@@ -453,8 +454,11 @@ decompress_buf(BZ2Decompressor *d, Py_ssize_t max_length)
+
+         d->bzs_avail_in_real += bzs->avail_in;
+
+-        if (catch_bz2_error(bzret))
++        if (catch_bz2_error(bzret)) {
++            d->bzerror = bzret;
++            d->needs_input = 0;
+             goto error;
++        }
+         if (bzret == BZ_STREAM_END) {
+             d->eof = 1;
+             break;
+@@ -621,10 +625,17 @@ _bz2_BZ2Decompressor_decompress_impl(BZ2Decompressor *self, Py_buffer *data,
+     PyObject *result = NULL;
+
+     ACQUIRE_LOCK(self);
+-    if (self->eof)
++    if (self->eof) {
+         PyErr_SetString(PyExc_EOFError, "End of stream already reached");
+-    else
++    }
++    else if (self->bzerror) {
++        // Re-entering BZ2_bzDecompress() after an error can write out of bounds.
++        PyErr_SetString(PyExc_ValueError,
++                        "Decompressor is unusable after a previous error");
++    }
++    else {
+         result = decompress(self, data->buf, data->len, max_length);
++    }
+     RELEASE_LOCK(self);
+     return result;
+ }
+@@ -658,6 +669,7 @@ _bz2_BZ2Decompressor_impl(PyTypeObject *type)
+         return NULL;
+     }
+
++    self->bzerror = 0;
+     self->needs_input = 1;
+     self->bzs_avail_in_real = 0;
+     self->input_buffer = NULL;
+--
+2.54.0
diff --git a/meta/recipes-devtools/python/python3_3.12.13.bb b/meta/recipes-devtools/python/python3_3.12.13.bb
index 24ceeb30a416..fc9764b9f641 100644
--- a/meta/recipes-devtools/python/python3_3.12.13.bb
+++ b/meta/recipes-devtools/python/python3_3.12.13.bb
@@ -46,6 +46,7 @@ SRC_URI = "http://www.python.org/ftp/python/${PV}/Python-${PV}.tar.xz \
            file://CVE-2026-4224.patch \
            file://CVE-2026-11940.patch \
            file://CVE-2026-11972.patch \
+           file://CVE-2026-9669.patch \
            "
 
 SRC_URI:append:class-native = " \