{"schema_version":"1.7.5","id":"CVE-2025-68261","published":"2025-12-16T14:45:03.252Z","modified":"2026-07-16T03:30:59.562833717Z","related":["SUSE-SU-2026:0447-1","SUSE-SU-2026:0472-1","SUSE-SU-2026:0473-1","SUSE-SU-2026:0587-1","SUSE-SU-2026:20477-1","SUSE-SU-2026:20498-1","SUSE-SU-2026:20555-1","SUSE-SU-2026:20570-1","SUSE-SU-2026:20599-1","SUSE-SU-2026:20615-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1","openSUSE-SU-2025:15836-1","openSUSE-SU-2026:10301-1","openSUSE-SU-2026:20287-1"],"summary":"ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: add i_data_sem protection in ext4_destroy_inline_data_nolock()\n\nFix a race between inline data destruction and block mapping.\n\nThe function ext4_destroy_inline_data_nolock() changes the inode data\nlayout by clearing EXT4_INODE_INLINE_DATA and setting EXT4_INODE_EXTENTS.\nAt the same time, another thread may execute ext4_map_blocks(), which\ntests EXT4_INODE_EXTENTS to decide whether to call ext4_ext_map_blocks()\nor ext4_ind_map_blocks().\n\nWithout i_data_sem protection, ext4_ind_map_blocks() may receive inode\nwith EXT4_INODE_EXTENTS flag and triggering assert.\n\nkernel BUG at fs/ext4/indirect.c:546!\nEXT4-fs (loop2): unmounting filesystem.\ninvalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014\nRIP: 0010:ext4_ind_map_blocks.cold+0x2b/0x5a fs/ext4/indirect.c:546\n\nCall Trace:\n <TASK>\n ext4_map_blocks+0xb9b/0x16f0 fs/ext4/inode.c:681\n _ext4_get_block+0x242/0x590 fs/ext4/inode.c:822\n ext4_block_write_begin+0x48b/0x12c0 fs/ext4/inode.c:1124\n ext4_write_begin+0x598/0xef0 fs/ext4/inode.c:1255\n ext4_da_write_begin+0x21e/0x9c0 fs/ext4/inode.c:3000\n generic_perform_write+0x259/0x5d0 mm/filemap.c:3846\n ext4_buffered_write_iter+0x15b/0x470 fs/ext4/file.c:285\n ext4_file_write_iter+0x8e0/0x17f0 fs/ext4/file.c:679\n call_write_iter include/linux/fs.h:2271 [inline]\n do_iter_readv_writev+0x212/0x3c0 fs/read_write.c:735\n do_iter_write+0x186/0x710 fs/read_write.c:861\n vfs_iter_write+0x70/0xa0 fs/read_write.c:902\n iter_file_splice_write+0x73b/0xc90 fs/splice.c:685\n do_splice_from fs/splice.c:763 [inline]\n direct_splice_actor+0x10f/0x170 fs/splice.c:950\n splice_direct_to_actor+0x33a/0xa10 fs/splice.c:896\n do_splice_direct+0x1a9/0x280 fs/splice.c:1002\n do_sendfile+0xb13/0x12c0 fs/read_write.c:1255\n __do_sys_sendfile64 fs/read_write.c:1323 [inline]\n __se_sys_sendfile64 fs/read_write.c:1309 [inline]\n __x64_sys_sendfile64+0x1cf/0x210 fs/read_write.c:1309\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x35/0x80 arch/x86/entry/common.c:81\n 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