import UBI python3.11-3.11.13-7.el8_10

SOURCES/00480-cve-2026-4786.patch

@@ -0,0 +1,63 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Stan Ulbrych <stan@python.org>
+Date: Mon, 13 Apr 2026 22:41:51 +0100
+Subject: 00480: CVE-2026-4786
+
+Fix webbrowser `%action` substitution bypass of dash-prefix check
+---
+ Lib/test/test_webbrowser.py                               | 8 ++++++++
+ Lib/webbrowser.py                                         | 5 +++--
+ .../2026-03-31-09-15-51.gh-issue-148169.EZJzz2.rst        | 2 ++
+ 3 files changed, 13 insertions(+), 2 deletions(-)
+ create mode 100644 Misc/NEWS.d/next/Security/2026-03-31-09-15-51.gh-issue-148169.EZJzz2.rst
+
+diff --git a/Lib/test/test_webbrowser.py b/Lib/test/test_webbrowser.py
+index 0ac985f56c..d629f889db 100644
+--- a/Lib/test/test_webbrowser.py
++++ b/Lib/test/test_webbrowser.py
+@@ -99,6 +99,14 @@ def test_open_new_tab(self):
+                    options=[],
+                    arguments=[URL])
+ 
++    def test_reject_action_dash_prefixes(self):
++        browser = self.browser_class(name=CMD_NAME)
++        with self.assertRaises(ValueError):
++            browser.open('%action--incognito')
++        # new=1: action is "--new-window", so "%action" itself expands to
++        # a dash-prefixed flag even with no dash in the original URL.
++        with self.assertRaises(ValueError):
++            browser.open('%action', new=1)
+ 
+ class MozillaCommandTest(CommandTestMixin, unittest.TestCase):
+ 
+diff --git a/Lib/webbrowser.py b/Lib/webbrowser.py
+index 0fd0aeb3c1..026bdfbd7b 100755
+--- a/Lib/webbrowser.py
++++ b/Lib/webbrowser.py
+@@ -265,7 +265,6 @@ def _invoke(self, args, remote, autoraise, url=None):
+ 
+     def open(self, url, new=0, autoraise=True):
+         sys.audit("webbrowser.open", url)
+-        self._check_url(url)
+         if new == 0:
+             action = self.remote_action
+         elif new == 1:
+@@ -279,7 +278,9 @@ def open(self, url, new=0, autoraise=True):
+             raise Error("Bad 'new' parameter to open(); " +
+                         "expected 0, 1, or 2, got %s" % new)
+ 
+-        args = [arg.replace("%s", url).replace("%action", action)
++        self._check_url(url.replace("%action", action))
++
++        args = [arg.replace("%action", action).replace("%s", url)
+                 for arg in self.remote_args]
+         args = [arg for arg in args if arg]
+         success = self._invoke(args, True, autoraise, url)
+diff --git a/Misc/NEWS.d/next/Security/2026-03-31-09-15-51.gh-issue-148169.EZJzz2.rst b/Misc/NEWS.d/next/Security/2026-03-31-09-15-51.gh-issue-148169.EZJzz2.rst
+new file mode 100644
+index 0000000000..45cdeebe1b
+--- /dev/null
++++ b/Misc/NEWS.d/next/Security/2026-03-31-09-15-51.gh-issue-148169.EZJzz2.rst
+@@ -0,0 +1,2 @@
++A bypass in :mod:`webbrowser` allowed URLs prefixed with ``%action`` to pass
++the dash-prefix safety check.

SOURCES/00482-cve-2026-6100.patch

@@ -0,0 +1,48 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Stan Ulbrych <stan@python.org>
+Date: Mon, 13 Apr 2026 22:42:36 +0100
+Subject: 00482: CVE-2026-6100
+
+Fix a possible UAF in {LZMA,BZ2,_Zlib}Decompressor
+---
+ .../Security/2026-04-10-16-28-21.gh-issue-148395.kfzm0G.rst  | 5 +++++
+ Modules/_bz2module.c                                         | 1 +
+ Modules/_lzmamodule.c                                        | 1 +
+ 3 files changed, 7 insertions(+)
+ create mode 100644 Misc/NEWS.d/next/Security/2026-04-10-16-28-21.gh-issue-148395.kfzm0G.rst
+
+diff --git a/Misc/NEWS.d/next/Security/2026-04-10-16-28-21.gh-issue-148395.kfzm0G.rst b/Misc/NEWS.d/next/Security/2026-04-10-16-28-21.gh-issue-148395.kfzm0G.rst
+new file mode 100644
+index 0000000000..349d1cf3ca
+--- /dev/null
++++ b/Misc/NEWS.d/next/Security/2026-04-10-16-28-21.gh-issue-148395.kfzm0G.rst
+@@ -0,0 +1,5 @@
++Fix a dangling input pointer in :class:`lzma.LZMADecompressor`,
++and :class:`bz2.BZ2Decompressor`
++when memory allocation fails with :exc:`MemoryError`, which could let a
++subsequent :meth:`!decompress` call read or write through a stale pointer to
++the already-released caller buffer.
+diff --git a/Modules/_bz2module.c b/Modules/_bz2module.c
+index 798e9efc62..b08ac5e44e 100644
+--- a/Modules/_bz2module.c
++++ b/Modules/_bz2module.c
+@@ -595,6 +595,7 @@ decompress(BZ2Decompressor *d, char *data, size_t len, Py_ssize_t max_length)
+     return result;
+ 
+ error:
++    bzs->next_in = NULL;
+     Py_XDECREF(result);
+     return NULL;
+ }
+diff --git a/Modules/_lzmamodule.c b/Modules/_lzmamodule.c
+index 97453a2808..51106a6a07 100644
+--- a/Modules/_lzmamodule.c
++++ b/Modules/_lzmamodule.c
+@@ -1105,6 +1105,7 @@ decompress(Decompressor *d, uint8_t *data, size_t len, Py_ssize_t max_length)
+     return result;
+ 
+ error:
++    lzs->next_in = NULL;
+     Py_XDECREF(result);
+     return NULL;
+ }

SPECS/python3.11.spec

@@ -20,7 +20,7 @@ URL: https://www.python.org/
 #global prerel ...
 %global upstream_version %{general_version}%{?prerel}
 Version: %{general_version}%{?prerel:~%{prerel}}
-Release: 6%{?dist}
+Release: 7%{?dist}
 License: Python
 
 
@@ -462,6 +462,18 @@ Patch476: 00476-cve-2026-1299.patch
 # Reject leading dashes in webbrowser URLs (GH-143931) (GH-146364)
 Patch478: 00478-cve-2026-4519.patch
 
+# 00480 # 9f4b1483ecfbc8c08117133c239fba544fcb42e7
+# CVE-2026-4786
+#
+# Fix webbrowser `%%action` substitution bypass of dash-prefix check
+Patch480: 00480-cve-2026-4786.patch
+
+# 00482 # 2a21454e658935990766df8c3c48af9363e8422a
+# CVE-2026-6100
+#
+# Fix a possible UAF in {LZMA,BZ2,_Zlib}Decompressor
+Patch482: 00482-cve-2026-6100.patch
+
 # (New patches go here ^^^)
 #
 # When adding new patches to "python" and "python3" in Fedora, EL, etc.,
@@ -1919,6 +1931,10 @@ fi
 # ======================================================
 
 %changelog
+* Fri Apr 17 2026 Charalampos Stratakis <cstratak@redhat.com> - 3.11.13-7
+- Security fixes for CVE-2026-4786, CVE-2026-6100
+Resolves: RHEL-168129, RHEL-167891
+
 * Thu Mar 26 2026 Lukáš Zachar <lzachar@redhat.com> - 3.11.13-6
 - Security fix for CVE-2026-4519
 Resolves: RHEL-158028