CVE-2025-21874

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] ...

Reserved 2024-12-29 | Published 2025-03-27 | Updated 2025-05-04 | Assigner Linux

Product status

Default status
unaffected

fb0987682c629c1d2c476f35f6fde405a5e304a4 before 22c6f577b3cb184857b440ae5e5916f6c9e7021d
affected

fb0987682c629c1d2c476f35f6fde405a5e304a4 before 06d9895f265282e939a8933bb18de82eba2b4dda
affected

fb0987682c629c1d2c476f35f6fde405a5e304a4 before 7fb39882b20c98a9a393c244c86b56ef6933cff8
affected

Default status
affected

6.11
affected

Any version before 6.11
unaffected

6.12.18
unaffected

6.13.6
unaffected

6.14
unaffected

References

git.kernel.org/...c/22c6f577b3cb184857b440ae5e5916f6c9e7021d

git.kernel.org/...c/06d9895f265282e939a8933bb18de82eba2b4dda

git.kernel.org/...c/7fb39882b20c98a9a393c244c86b56ef6933cff8

cve.org (CVE-2025-21874)

nvd.nist.gov (CVE-2025-21874)

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