grub: patch CVE-2025-0622

Cherry-pick patch mentioning this CVE.

(From OE-Core rev: 13fafdaa6958bd4cf1ff350caf355c8c41a80e47)

Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

4 files changed, 117 insertions, 0 deletions

diff --git a/meta/recipes-bsp/grub/files/CVE-2025-0622-01.patch b/meta/recipes-bsp/grub/files/CVE-2025-0622-01.patch
new file mode 100644
index 0000000000..09dbfce5f8
--- /dev/null
+++ b/meta/recipes-bsp/grub/files/CVE-2025-0622-01.patch
@@ -0,0 +1,35 @@
+From 2123c5bca7e21fbeb0263df4597ddd7054700726 Mon Sep 17 00:00:00 2001
+From: B Horn <b@horn.uk>
+Date: Fri, 1 Nov 2024 19:24:29 +0000
+Subject: [PATCH 1/3] commands/pgp: Unregister the "check_signatures" hooks on
+ module unload
+
+If the hooks are not removed they can be called after the module has
+been unloaded leading to an use-after-free.
+
+Fixes: CVE-2025-0622
+
+Reported-by: B Horn <b@horn.uk>
+Signed-off-by: B Horn <b@horn.uk>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+
+CVE: CVE-2025-0622
+Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=2123c5bca7e21fbeb0263df4597ddd7054700726]
+Signed-off-by: Peter Marko <peter.marko@siemens.com>
+---
+ grub-core/commands/pgp.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/grub-core/commands/pgp.c b/grub-core/commands/pgp.c
+index c6766f044..5fadc33c4 100644
+--- a/grub-core/commands/pgp.c
++++ b/grub-core/commands/pgp.c
+@@ -1010,6 +1010,8 @@ GRUB_MOD_INIT(pgp)
+ 
+ GRUB_MOD_FINI(pgp)
+ {
++  grub_register_variable_hook ("check_signatures", NULL, NULL);
++  grub_env_unset ("check_signatures");
+   grub_verifier_unregister (&grub_pubkey_verifier);
+   grub_unregister_extcmd (cmd);
+   grub_unregister_extcmd (cmd_trust);
diff --git a/meta/recipes-bsp/grub/files/CVE-2025-0622-02.patch b/meta/recipes-bsp/grub/files/CVE-2025-0622-02.patch
new file mode 100644
index 0000000000..be01da3355
--- /dev/null
+++ b/meta/recipes-bsp/grub/files/CVE-2025-0622-02.patch
@@ -0,0 +1,41 @@
+From 9c16197734ada8d0838407eebe081117799bfe67 Mon Sep 17 00:00:00 2001
+From: B Horn <b@horn.uk>
+Date: Fri, 1 Nov 2024 23:46:55 +0000
+Subject: [PATCH 2/3] normal: Remove variables hooks on module unload
+
+The normal module does not entirely cleanup after itself in
+its GRUB_MOD_FINI() leaving a few variables hooks in place.
+It is not possible to unload normal module now but fix the
+issues for completeness.
+
+On the occasion replace 0s with NULLs for "pager" variable
+hooks unregister.
+
+Fixes: CVE-2025-0622
+
+Reported-by: B Horn <b@horn.uk>
+Signed-off-by: B Horn <b@horn.uk>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+
+CVE: CVE-2025-0622
+Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=9c16197734ada8d0838407eebe081117799bfe67]
+Signed-off-by: Peter Marko <peter.marko@siemens.com>
+---
+ grub-core/normal/main.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/grub-core/normal/main.c b/grub-core/normal/main.c
+index 838f57fa5..04d058f55 100644
+--- a/grub-core/normal/main.c
++++ b/grub-core/normal/main.c
+@@ -582,7 +582,9 @@ GRUB_MOD_FINI(normal)
+   grub_xputs = grub_xputs_saved;
+ 
+   grub_set_history (0);
+-  grub_register_variable_hook ("pager", 0, 0);
++  grub_register_variable_hook ("pager", NULL, NULL);
++  grub_register_variable_hook ("color_normal", NULL, NULL);
++  grub_register_variable_hook ("color_highlight", NULL, NULL);
+   grub_fs_autoload_hook = 0;
+   grub_unregister_command (cmd_clear);
+ }
diff --git a/meta/recipes-bsp/grub/files/CVE-2025-0622-03.patch b/meta/recipes-bsp/grub/files/CVE-2025-0622-03.patch
new file mode 100644
index 0000000000..79078a4350
--- /dev/null
+++ b/meta/recipes-bsp/grub/files/CVE-2025-0622-03.patch
@@ -0,0 +1,38 @@
+From 7580addfc8c94cedb0cdfd7a1fd65b539215e637 Mon Sep 17 00:00:00 2001
+From: B Horn <b@horn.uk>
+Date: Fri, 1 Nov 2024 23:52:06 +0000
+Subject: [PATCH 3/3] gettext: Remove variables hooks on module unload
+
+The gettext module does not entirely cleanup after itself in
+its GRUB_MOD_FINI() leaving a few variables hooks in place.
+It is not possible to unload gettext module because normal
+module depends on it. Though fix the issues for completeness.
+
+Fixes: CVE-2025-0622
+
+Reported-by: B Horn <b@horn.uk>
+Signed-off-by: B Horn <b@horn.uk>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+
+CVE: CVE-2025-0622
+Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=7580addfc8c94cedb0cdfd7a1fd65b539215e637]
+Signed-off-by: Peter Marko <peter.marko@siemens.com>
+---
+ grub-core/gettext/gettext.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/grub-core/gettext/gettext.c b/grub-core/gettext/gettext.c
+index 7a1c14e4f..e4f4f8ee6 100644
+--- a/grub-core/gettext/gettext.c
++++ b/grub-core/gettext/gettext.c
+@@ -535,6 +535,10 @@ GRUB_MOD_INIT (gettext)
+ 
+ GRUB_MOD_FINI (gettext)
+ {
++  grub_register_variable_hook ("locale_dir", NULL, NULL);
++  grub_register_variable_hook ("secondary_locale_dir", NULL, NULL);
++  grub_register_variable_hook ("lang", NULL, NULL);
++
+   grub_gettext_delete_list (&main_context);
+   grub_gettext_delete_list (&secondary_context);
+ 
diff --git a/meta/recipes-bsp/grub/grub2.inc b/meta/recipes-bsp/grub/grub2.inc
index 0ad5ba7fc0..99174a4f33 100644
--- a/meta/recipes-bsp/grub/grub2.inc
+++ b/meta/recipes-bsp/grub/grub2.inc
@@ -26,6 +26,9 @@ SRC_URI = "${GNU_MIRROR}/grub/grub-${PV}.tar.gz \
            file://CVE-2025-0624.patch \
            file://CVE-2024-45774.patch \
            file://CVE-2024-45775.patch \
+           file://CVE-2025-0622-01.patch \
+           file://CVE-2025-0622-02.patch \
+           file://CVE-2025-0622-03.patch \
 "
 
 SRC_URI[sha256sum] = "b30919fa5be280417c17ac561bb1650f60cfb80cc6237fa1e2b6f56154cb9c91"