Answer in brief
CVE-2025-38230 records a High severity (CVSS 7.8) vulnerability in jfs: validate AG parameters in dbMount() to prevent crashes. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <95ae5ee6069d9a5945772625f289422ef659221a || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a4259e72363e1ea204a97292001a9fc36c7e52fd || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c3705c82b7406a15ef38a610d03bf6baa43d6e0c || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9242ff6245527a3ebb693ddd175493b38ddca72f || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0c40fa81f850556e9aa0185fede9ef1112db7b39 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8b69608c6b6779a7ab07ce4467a56df90152cfb9 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b62a1e59d8716bbd2e73660743fe06acc97ed7d1 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <37bfb464ddca87f203071b5bd562cd91ddc0b40a | 95ae5ee6069d9a5945772625f289422ef659221a, a4259e72363e1ea204a97292001a9fc36c7e52fd, c3705c82b7406a15ef38a610d03bf6baa43d6e0c, 9242ff6245527a3ebb693ddd175493b38ddca72f, 0c40fa81f850556e9aa0185fede9ef1112db7b39, 8b69608c6b6779a7ab07ce4467a56df90152cfb9, b62a1e59d8716bbd2e73660743fe06acc97ed7d1, 37bfb464ddca87f203071b5bd562cd91ddc0b40a |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Jul 4, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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: <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.
Quoted source text, attributed separately from HOL analysis.