CVE-2026-43288

Zwakheid

In the Linux kernel, the following vulnerability has been resolved: ext4: move ext4_percpu_param_init() before ext4_mb_init() When running `kvm-xfstests -c ext4/1k -C 1 generic/383` with the `DOUBLE_CHECK` macro defined, the following panic is triggered: ================================================================== EXT4-fs error (device vdc): ext4_validate_block_bitmap:423: comm mount: bg 0: bad block bitmap checksum BUG: unable to handle page fault for address: ff110000fa2cc000 PGD 3e01067 P4D 3e02067 PUD 0 Oops: Oops: 0000 [#1] SMP NOPTI CPU: 0 UID: 0 PID: 2386 Comm: mount Tainted: G W 6.18.0-gba65a4e7120a-dirty #1152 PREEMPT(none) RIP: 0010:percpu_counter_add_batch+0x13/0xa0 Call Trace: <TASK> ext4_mark_group_bitmap_corrupted+0xcb/0xe0 ext4_validate_block_bitmap+0x2a1/0x2f0 ext4_read_block_bitmap+0x33/0x50 mb_group_bb_bitmap_alloc+0x33/0x80 ext4_mb_add_groupinfo+0x190/0x250 ext4_mb_init_backend+0x87/0x290 ext4_mb_init+0x456/0x640 __ext4_fill_super+0x1072/0x1680 ext4_fill_super+0xd3/0x280 get_tree_bdev_flags+0x132/0x1d0 vfs_get_tree+0x29/0xd0 vfs_cmd_create+0x59/0xe0 __do_sys_fsconfig+0x4f6/0x6b0 do_syscall_64+0x50/0x1f0 entry_SYSCALL_64_after_hwframe+0x76/0x7e =============

Getroffen producten

• linux linux_kernel

Bronnen

• https://git.kernel.org/stable/c/0b3d80c56957862ba477ca0ce30c12cad9179c2b
• https://git.kernel.org/stable/c/0d5fcb063cdabb9aeaa8554b7fedad2092c4150e
• https://git.kernel.org/stable/c/270564513489d98b721a1e4a10017978d5213bff
• https://git.kernel.org/stable/c/9e9fb259bcddf459a0168f4a964e979e500a68a5
• https://git.kernel.org/stable/c/aec095f3cc6cf209effd93278ce35be27db81d73
• https://git.kernel.org/stable/c/bf5b609524497c195f801cd5707252384aed8149