On Wed Mar 25, 2026 at 8:23 AM CET, Vijay Anusuri via lists.openembedded.org wrote: > Pick patch mentioned in NVD > > [1] https://nvd.nist.gov/vuln/detail/CVE-2026-27448 > [2] https://ubuntu.com/security/CVE-2026-27448 > > Signed-off-by: Vijay Anusuri <[email protected]> > ---
Hello, As far as I can tell, this CVE also applies to whinlatter. You need to send the fix there before I can take it for scarthgap and kirkstone. That also applies to the 2/2 patch. Regards, > .../python3-pyopenssl/CVE-2026-27448.patch | 124 ++++++++++++++++++ > .../python/python3-pyopenssl_24.0.0.bb | 4 + > 2 files changed, 128 insertions(+) > create mode 100644 > meta/recipes-devtools/python/python3-pyopenssl/CVE-2026-27448.patch > > diff --git > a/meta/recipes-devtools/python/python3-pyopenssl/CVE-2026-27448.patch > b/meta/recipes-devtools/python/python3-pyopenssl/CVE-2026-27448.patch > new file mode 100644 > index 0000000000..87f46b4cb0 > --- /dev/null > +++ b/meta/recipes-devtools/python/python3-pyopenssl/CVE-2026-27448.patch > @@ -0,0 +1,124 @@ > +From d41a814759a9fb49584ca8ab3f7295de49a85aa0 Mon Sep 17 00:00:00 2001 > +From: Alex Gaynor <[email protected]> > +Date: Mon, 16 Feb 2026 21:04:37 -0500 > +Subject: [PATCH] Handle exceptions in set_tlsext_servername_callback > callbacks > + (#1478) > + > +When the servername callback raises an exception, call sys.excepthook > +with the exception info and return SSL_TLSEXT_ERR_ALERT_FATAL to abort > +the handshake. Previously, exceptions would propagate uncaught through > +the CFFI callback boundary. > + > +https://claude.ai/code/session_01P7y1XmWkdtC5UcmZwGDvGi > + > +Co-authored-by: Claude <[email protected]> > + > +Upstream-Status: Backport > [https://github.com/pyca/pyopenssl/commit/d41a814759a9fb49584ca8ab3f7295de49a85aa0] > +CVE: CVE-2026-27448 > +Signed-off-by: Vijay Anusuri <[email protected]> > +--- > + CHANGELOG.rst | 1 + > + src/OpenSSL/SSL.py | 7 ++++++- > + tests/test_ssl.py | 50 ++++++++++++++++++++++++++++++++++++++++++++++ > + 3 files changed, 57 insertions(+), 1 deletion(-) > + > +diff --git a/CHANGELOG.rst b/CHANGELOG.rst > +index 6e23770..12e60e4 100644 > +--- a/CHANGELOG.rst > ++++ b/CHANGELOG.rst > +@@ -18,6 +18,7 @@ Changes: > + > + - Added ``OpenSSL.SSL.Connection.get_selected_srtp_profile`` to determine > which SRTP profile was negotiated. > + `#1279 <https://github.com/pyca/pyopenssl/pull/1279>`_. > ++- ``Context.set_tlsext_servername_callback`` now handles exceptions raised > in the callback by calling ``sys.excepthook`` and returning a fatal TLS > alert. Previously, exceptions were silently swallowed and the handshake would > proceed as if the callback had succeeded. > + > + 23.3.0 (2023-10-25) > + ------------------- > +diff --git a/src/OpenSSL/SSL.py b/src/OpenSSL/SSL.py > +index 4db5240..a6263c4 100644 > +--- a/src/OpenSSL/SSL.py > ++++ b/src/OpenSSL/SSL.py > +@@ -1,5 +1,6 @@ > + import os > + import socket > ++import sys > + import typing > + from errno import errorcode > + from functools import partial, wraps > +@@ -1567,7 +1568,11 @@ class Context: > + > + @wraps(callback) > + def wrapper(ssl, alert, arg): > +- callback(Connection._reverse_mapping[ssl]) > ++ try: > ++ callback(Connection._reverse_mapping[ssl]) > ++ except Exception: > ++ sys.excepthook(*sys.exc_info()) > ++ return _lib.SSL_TLSEXT_ERR_ALERT_FATAL > + return 0 > + > + self._tlsext_servername_callback = _ffi.callback( > +diff --git a/tests/test_ssl.py b/tests/test_ssl.py > +index ca5bf83..55489b9 100644 > +--- a/tests/test_ssl.py > ++++ b/tests/test_ssl.py > +@@ -1855,6 +1855,56 @@ class TestServerNameCallback: > + > + assert args == [(server, b"foo1.example.com")] > + > ++ def test_servername_callback_exception( > ++ self, monkeypatch: pytest.MonkeyPatch > ++ ) -> None: > ++ """ > ++ When the callback passed to `Context.set_tlsext_servername_callback` > ++ raises an exception, ``sys.excepthook`` is called with the exception > ++ and the handshake fails with an ``Error``. > ++ """ > ++ exc = TypeError("server name callback failed") > ++ > ++ def servername(conn: Connection) -> None: > ++ raise exc > ++ > ++ excepthook_calls: list[ > ++ tuple[type[BaseException], BaseException, object] > ++ ] = [] > ++ > ++ def custom_excepthook( > ++ exc_type: type[BaseException], > ++ exc_value: BaseException, > ++ exc_tb: object, > ++ ) -> None: > ++ excepthook_calls.append((exc_type, exc_value, exc_tb)) > ++ > ++ context = Context(SSLv23_METHOD) > ++ context.set_tlsext_servername_callback(servername) > ++ > ++ # Necessary to actually accept the connection > ++ context.use_privatekey(load_privatekey(FILETYPE_PEM, > server_key_pem)) > ++ context.use_certificate( > ++ load_certificate(FILETYPE_PEM, server_cert_pem) > ++ ) > ++ > ++ # Do a little connection to trigger the logic > ++ server = Connection(context, None) > ++ server.set_accept_state() > ++ > ++ client = Connection(Context(SSLv23_METHOD), None) > ++ client.set_connect_state() > ++ client.set_tlsext_host_name(b"foo1.example.com") > ++ > ++ monkeypatch.setattr(sys, "excepthook", custom_excepthook) > ++ with pytest.raises(Error): > ++ interact_in_memory(server, client) > ++ > ++ assert len(excepthook_calls) == 1 > ++ assert excepthook_calls[0][0] is TypeError > ++ assert excepthook_calls[0][1] is exc > ++ assert excepthook_calls[0][2] is not None > ++ > + > + class TestApplicationLayerProtoNegotiation: > + """ > +-- > +2.43.0 > + > diff --git a/meta/recipes-devtools/python/python3-pyopenssl_24.0.0.bb > b/meta/recipes-devtools/python/python3-pyopenssl_24.0.0.bb > index 116f214bfa..bc0b568a46 100644 > --- a/meta/recipes-devtools/python/python3-pyopenssl_24.0.0.bb > +++ b/meta/recipes-devtools/python/python3-pyopenssl_24.0.0.bb > @@ -10,6 +10,10 @@ SRC_URI[sha256sum] = > "6aa33039a93fffa4563e655b61d11364d01264be8ccb49906101e02a33 > PYPI_PACKAGE = "pyOpenSSL" > inherit pypi setuptools3 > > +SRC_URI += " \ > + file://CVE-2026-27448.patch \ > +" > + > PACKAGES =+ "${PN}-tests" > FILES:${PN}-tests = "${libdir}/${PYTHON_DIR}/site-packages/OpenSSL/test" > -- Yoann Congal Smile ECS
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