CVE-2025-38230
published 2025-07-04CVE-2025-38230: In the Linux kernel, the following vulnerability has been resolved: jfs: validate AG parameters in dbMount() to prevent crashes Validate db_agheight…
high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
In the Linux kernel, the following vulnerability has been resolved:
jfs: validate AG parameters in dbMount() to prevent crashes
Validate db_agheight, db_agwidth, and db_agstart in dbMount to catch
corrupted metadata early and avoid undefined behavior in dbAllocAG.
Limits are derived from L2LPERCTL, LPERCTL/MAXAG, and CTLTREESIZE:
- agheight: 0 to L2LPERCTL/2 (0 to 5) ensures shift
(L2LPERCTL - 2*agheight) >= 0.
- agwidth: 1 to min(LPERCTL/MAXAG, 2^(L2LPERCTL - 2*agheight))
ensures agperlev >= 1.
- Ranges: 1-8 (agheight 0-3), 1-4 (agheight 4), 1 (agheight 5).
- LPERCTL/MAXAG = 1024/128 = 8 limits leaves per AG;
2^(10 - 2*agheight) prevents division to 0.
- agstart: 0 to CTLTREESIZE-1 - agwidth*(MAXAG-1) keeps ti within
stree (size 1365).
- Ranges: 0-1237 (agwidth 1), 0-348 (agwidth 8).
UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:1400:9
shift exponent -335544310 is negative
CPU: 0 UID: 0 PID: 5822 Comm: syz-executor130 Not tainted 6.14.0-rc5-syzkaller #0
Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
ubsan_epilogue lib/ubsan.c:231 [inline]
__ubsan_handle_shift_out_of_bounds+0x3c8/0x420 lib/ubsan.c:468
dbAllocAG+0x1087/0x10b0 fs/jfs/jfs_dmap.c:1400
dbDiscardAG+0x352/0xa20 fs/jfs/jfs_dmap.c:1613
jfs_ioc_trim+0x45a/0x6b0 fs/jfs/jfs_discard.c:105
jfs_ioctl+0x2cd/0x3e0 fs/jfs/ioctl.c:131
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Affected
36 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | linux | < linux 6.1.147-1 (bookworm) | linux 6.1.147-1 (bookworm) |
| debian | linux-6.1 | < linux 6.1.147-1 (bookworm) | linux 6.1.147-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 95ae5ee6069d9a5945772625f289422ef659221a | 95ae5ee6069d9a5945772625f289422ef659221a |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a4259e72363e1ea204a97292001a9fc36c7e52fd | a4259e72363e1ea204a97292001a9fc36c7e52fd |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c3705c82b7406a15ef38a610d03bf6baa43d6e0c | c3705c82b7406a15ef38a610d03bf6baa43d6e0c |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9242ff6245527a3ebb693ddd175493b38ddca72f | 9242ff6245527a3ebb693ddd175493b38ddca72f |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0c40fa81f850556e9aa0185fede9ef1112db7b39 | 0c40fa81f850556e9aa0185fede9ef1112db7b39 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8b69608c6b6779a7ab07ce4467a56df90152cfb9 | 8b69608c6b6779a7ab07ce4467a56df90152cfb9 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b62a1e59d8716bbd2e73660743fe06acc97ed7d1 | b62a1e59d8716bbd2e73660743fe06acc97ed7d1 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 37bfb464ddca87f203071b5bd562cd91ddc0b40a | 37bfb464ddca87f203071b5bd562cd91ddc0b40a |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.244-1 | 5.10.244-1 |
| linux | linux_kernel | >= 0 < 6.1.147-1 | 6.1.147-1 |
| linux | linux_kernel | >= 0 < 6.12.37-1 | 6.12.37-1 |
| linux | linux_kernel | >= 0 < 6.12.37-1 | 6.12.37-1 |
| linux | linux_kernel | >= 0 < 6.8.0-100.100 | 6.8.0-100.100 |
| linux | linux_kernel | >= 2.6.13 < 5.4.296 | 5.4.296 |
| linux | linux_kernel | >= 5.11 < 5.15.187 | 5.15.187 |
| linux | linux_kernel | >= 5.16 < 6.1.143 | 6.1.143 |
| linux | linux_kernel | >= 5.5 < 5.10.240 | 5.10.240 |
| linux | linux_kernel | >= 6.13 < 6.15.4 | 6.15.4 |
| linux | linux_kernel | >= 6.2 < 6.6.96 | 6.6.96 |
| linux | linux_kernel | >= 6.7 < 6.12.36 | 6.12.36 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH