CVE-2023-54127 in Linux
Sumário
de VulDB • 24/05/2026
No kernel do Linux, a seguinte vulnerabilidade foi resolvida:
fs/jfs: prevenir double-free em dbUnmount() após falha no jfs_remount()
O Syzkaller relatou o seguinte problema: ================================================================== BUG: KASAN: double-free em slab_free mm/slub.c:3787 [inline]
BUG: KASAN: double-free em __kmem_cache_free+0x71/0x110 mm/slub.c:3800 Read of size 8 at addr ffff888103999000 by task syz-executor.0/13352
Preallocated memory ffff888103999000 has been freed ==================================================================
CPU: 0 PID: 13352 Comm: syz-executor.0 Not tainted 6.1.0-rc5-syzkaller #0 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x57/0x80 lib/dump_stack.c:86 print_report+0x13a/0x460 mm/kasan/common.c:615 kasan_report+0xb1/0x130 mm/kasan/common.c:625 kasan_check_range+0x140/0x180 mm/kasan/common.c:553 __kasan_slab_free+0x90/0x100 mm/kasan/common.c:233 slab_free_hook mm/slub.c:1781 [inline]
slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline]
__kmem_cache_free+0x71/0x110 mm/slub.c:3800 dbUnmount+0xf4/0x110 fs/jfs/jfs_dmap.c:264 jfs_mount_rw+0x545/0x740 fs/jfs/jfs_mount.c:247 jfs_remount+0x3db/0x710 fs/jfs/super.c:454 reconfigure_super+0x3bc/0x7b0 fs/super.c:935 vfs_fsconfig_locked fs/fsopen.c:254 [inline]
__do_sys_fsconfig fs/fsopen.c:439 [inline]
__se_sys_fsconfig+0xad5/0x1060 fs/fsopen.c:314 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd
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