CVE-2025-38230

HIGH EPSS 5.3%
Published Jul 4, 202512mo ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
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Published Jul 4, 2025 12mo ago
Last Modified Jun 17, 2026 2w ago

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 - 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.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
5.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 13

VendorProductVersionRange
linuxlinux_kernel*≥2.6.13  –  <5.4.296
linuxlinux_kernel*≥5.5  –  <5.10.240
linuxlinux_kernel*≥5.11  –  <5.15.187
linuxlinux_kernel*≥5.16  –  <6.1.143
linuxlinux_kernel*≥6.2  –  <6.6.96
linuxlinux_kernel*≥6.7  –  <6.12.36
linuxlinux_kernel*≥6.13  –  <6.15.4
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
debiandebian_linux11.0any

References 10

  • git.kernel.org https://git.kernel.org/stable/c/0c40fa81f850556e9aa0185fede9ef1112db7b39
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/37bfb464ddca87f203071b5bd562cd91ddc0b40a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8b69608c6b6779a7ab07ce4467a56df90152cfb9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9242ff6245527a3ebb693ddd175493b38ddca72f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/95ae5ee6069d9a5945772625f289422ef659221a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a4259e72363e1ea204a97292001a9fc36c7e52fd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b62a1e59d8716bbd2e73660743fe06acc97ed7d1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c3705c82b7406a15ef38a610d03bf6baa43d6e0c
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
    Mailing ListThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Mailing ListThird Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0c40fa81f850556e9aa0185fede9ef1112db7b39
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/37bfb464ddca87f203071b5bd562cd91ddc0b40a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8b69608c6b6779a7ab07ce4467a56df90152cfb9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9242ff6245527a3ebb693ddd175493b38ddca72f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/95ae5ee6069d9a5945772625f289422ef659221a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a4259e72363e1ea204a97292001a9fc36c7e52fd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b62a1e59d8716bbd2e73660743fe06acc97ed7d1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c3705c82b7406a15ef38a610d03bf6baa43d6e0c
    Patch