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CVE PROGRAM SOURCE RECORDUnscored

CVE-2025-21874

dm-integrity: Avoid divide by zero in table status in Inline mode

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Status
Published
Published
Updated
Assigning organization
Linux

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] ...

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • fb0987682c629c1d2c476f35f6fde405a5e304a4 to < 22c6f577b3cb184857b440ae5e5916f6c9e7021daffected
  • fb0987682c629c1d2c476f35f6fde405a5e304a4 to < 06d9895f265282e939a8933bb18de82eba2b4ddaaffected
  • fb0987682c629c1d2c476f35f6fde405a5e304a4 to < 7fb39882b20c98a9a393c244c86b56ef6933cff8affected

Linux Linux

Default version status: affected

  • 6.11affected
  • 0 to < 6.11unaffected
  • 6.12.18 to ≤ 6.12.*unaffected
  • 6.13.6 to ≤ 6.13.*unaffected
  • 6.14 to ≤ *unaffected

References