CVE - CVE-2025-38230

CVE-ID
CVE-2025-38230	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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 - 2agheight) >= 0. - agwidth: 1 to min(LPERCTL/MAXAG, 2^(L2LPERCTL - 2agheight)) 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 - 2agheight) 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: <TASK> __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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0c40fa81f850556e9aa0185fede9ef1112db7b39 URL:https://git.kernel.org/stable/c/0c40fa81f850556e9aa0185fede9ef1112db7b39 MISC:https://git.kernel.org/stable/c/37bfb464ddca87f203071b5bd562cd91ddc0b40a URL:https://git.kernel.org/stable/c/37bfb464ddca87f203071b5bd562cd91ddc0b40a MISC:https://git.kernel.org/stable/c/8b69608c6b6779a7ab07ce4467a56df90152cfb9 URL:https://git.kernel.org/stable/c/8b69608c6b6779a7ab07ce4467a56df90152cfb9 MISC:https://git.kernel.org/stable/c/9242ff6245527a3ebb693ddd175493b38ddca72f URL:https://git.kernel.org/stable/c/9242ff6245527a3ebb693ddd175493b38ddca72f MISC:https://git.kernel.org/stable/c/b62a1e59d8716bbd2e73660743fe06acc97ed7d1 URL:https://git.kernel.org/stable/c/b62a1e59d8716bbd2e73660743fe06acc97ed7d1 MISC:https://git.kernel.org/stable/c/c3705c82b7406a15ef38a610d03bf6baa43d6e0c URL:https://git.kernel.org/stable/c/c3705c82b7406a15ef38a610d03bf6baa43d6e0c
Assigning CNA
kernel.org
Date Record Created
20250416	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250416)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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