CVE-2025-21874
MEDIUM EPSS 8.4%
Published Mar 27, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Published Mar 27, 2025 1y ago
Last Modified Jun 17, 2026 2w ago
Description
In the Linux kernel, the following vulnerability has been resolved: dm-integrity: Avoid divide by zero in table status in Inline mode In Inline mode, the journal is unused, and journal_sectors is zero. Calculating the journal watermark requires dividing by journal_sectors, which should be done only if the journal is configured. Otherwise, a simple table query (dmsetup table) can cause OOPS. This bug did not show on some systems, perhaps only due to compiler optimization. On my 32-bit testing machine, this reliably crashes with the following: : Oops: divide error: 0000 [#1] PREEMPT SMP : CPU: 0 UID: 0 PID: 2450 Comm: dmsetup Not tainted 6.14.0-rc2+ #959 : EIP: dm_integrity_status+0x2f8/0xab0 [dm_integrity] ...
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High
Threat Intelligence
EPSS Exploit Probability
8.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available
Weaknesses 1
CWE-369
Affected Products 6
References 3
- git.kernel.org https://git.kernel.org/stable/c/06d9895f265282e939a8933bb18de82eba2b4dda
- git.kernel.org https://git.kernel.org/stable/c/22c6f577b3cb184857b440ae5e5916f6c9e7021d
- git.kernel.org https://git.kernel.org/stable/c/7fb39882b20c98a9a393c244c86b56ef6933cff8
Remediation
- git.kernel.org https://git.kernel.org/stable/c/06d9895f265282e939a8933bb18de82eba2b4dda
- git.kernel.org https://git.kernel.org/stable/c/22c6f577b3cb184857b440ae5e5916f6c9e7021d
- git.kernel.org https://git.kernel.org/stable/c/7fb39882b20c98a9a393c244c86b56ef6933cff8