cbcvebase.
CVE-2022-50638
published 2025-12-09

CVE-2022-50638: In the Linux kernel, the following vulnerability has been resolved: ext4: fix bug_on in __es_tree_search caused by bad boot loader inode We got a issue as…

PriorityP423medium7
EPSS
0.22%
12.3th percentile
In the Linux kernel, the following vulnerability has been resolved: ext4: fix bug_on in __es_tree_search caused by bad boot loader inode We got a issue as fllows: kernel BUG at fs/ext4/extents_status.c:203! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 1 PID: 945 Comm: cat Not tainted 6.0.0-next-20221007-dirty #349 RIP: 0010:ext4_es_end.isra.0+0x34/0x42 RSP: 0018:ffffc9000143b768 EFLAGS: 00010203 RAX: 0000000000000000 RBX: ffff8881769cd0b8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8fc27cf7 RDI: 00000000ffffffff RBP: ffff8881769cd0bc R08: 0000000000000000 R09: ffffc9000143b5f8 R10: 0000000000000001 R11: 0000000000000001 R12: ffff8881769cd0a0 R13: ffff8881768e5668 R14: 00000000768e52f0 R15: 0000000000000000 FS: 00007f359f7f05c0(0000)GS:ffff88842fd00000(0000)knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f359f5a2000 CR3: 000000017130c000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __es_tree_search.isra.0+0x6d/0xf5 ext4_es_cache_extent+0xfa/0x230 ext4_cache_extents+0xd2/0x110 ext4_find_extent+0x5d5/0x8c0 ext4_ext_map_blocks+0x9c/0x1d30 ext4_map_blocks+0x431/0xa50 ext4_mpage_readpages+0x48e/0xe40 ext4_readahead+0x47/0x50 read_pages+0x82/0x530 page_cache_ra_unbounded+0x199/0x2a0 do_page_cache_ra+0x47/0x70 page_cache_ra_order+0x242/0x400 ondemand_readahead+0x1e8/0x4b0 page_cache_sync_ra+0xf4/0x110 filemap_get_pages+0x131/0xb20 filemap_read+0xda/0x4b0 generic_file_read_iter+0x13a/0x250 ext4_file_read_iter+0x59/0x1d0 vfs_read+0x28f/0x460 ksys_read+0x73/0x160 __x64_sys_read+0x1e/0x30 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd In the above issue, ioctl invokes the swap_inode_boot_loader function to swap inode and inode. However, inode contain incorrect imode and disordered extents, and i_nlink is set to 1. The extents check for inode in the ext4_iget function can be bypassed bacause 5

Affected

23 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.4-1 (bookworm)linux 6.1.4-1 (bookworm)
linuxlinux——
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < e76ede9d2c9e0af4573342b56d7cdbf757c18084e76ede9d2c9e0af4573342b56d7cdbf757c18084
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < a95ba369255ddcdc5e43d38bc5203537bdf3a518a95ba369255ddcdc5e43d38bc5203537bdf3a518
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < 5f8d36abd2059bf1bd016b17d1fe78d8613deddd5f8d36abd2059bf1bd016b17d1fe78d8613deddd
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < 78e335fb573e6a85718c4c24d5a052718a99a9ed78e335fb573e6a85718c4c24d5a052718a99a9ed
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < 71e99ec1315fe98d322b17b9a28f204aaf15ffee71e99ec1315fe98d322b17b9a28f204aaf15ffee
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < d480a49c15c465cb9a16db1379f4996e9b5bb9ccd480a49c15c465cb9a16db1379f4996e9b5bb9cc
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < feec0ea94c5ef4aa118750284c8a921698733ef2feec0ea94c5ef4aa118750284c8a921698733ef2
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < a125c8806b7d3c3815b6f9f59d395b9d7527b0efa125c8806b7d3c3815b6f9f59d395b9d7527b0ef
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < 991ed014de0840c5dc405b679168924afb2952ac991ed014de0840c5dc405b679168924afb2952ac
linuxlinux_kernel>= 0 < 5.10.178-15.10.178-1
linuxlinux_kernel>= 0 < 6.1.4-16.1.4-1
linuxlinux_kernel>= 0 < 6.1.4-16.1.4-1
linuxlinux_kernel>= 0 < 6.1.4-16.1.4-1
linuxlinux_kernel>= 3.10.0 < 4.9.3374.9.337
linuxlinux_kernel>= 4.10.0 < 4.14.3034.14.303
linuxlinux_kernel>= 4.15.0 < 4.19.2704.19.270
linuxlinux_kernel>= 4.20.0 < 5.4.2295.4.229
linuxlinux_kernel>= 5.11.0 < 5.15.875.15.87
linuxlinux_kernel>= 5.16.0 < 6.0.186.0.18
linuxlinux_kernel>= 5.5.0 < 5.10.1635.10.163
linuxlinux_kernel>= 6.1.0 < 6.1.46.1.4
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