From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: B Horn Date: Fri, 1 Nov 2024 23:46:55 +0000 Subject: [PATCH] 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 Signed-off-by: B Horn Reviewed-by: Daniel Kiper --- 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 cad840e06..dd20e5129 100644 --- a/grub-core/normal/main.c +++ b/grub-core/normal/main.c @@ -690,7 +690,9 @@ 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); }