CVE-2025-21874
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-21874
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21874.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-21874
- Downstream
- Related
- Published
- 2025-03-27T14:57:05.496Z
- Modified
- 2025-11-20T08:04:28.830797Z
- Summary
- dm-integrity: Avoid divide by zero in table status in Inline mode
- Details
-
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: dmintegritystatus+0x2f8/0xab0 [dm_integrity] ...
- References
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfb0987682c629c1d2c476f35f6fde405a5e304a4Fixed22c6f577b3cb184857b440ae5e5916f6c9e7021d
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfb0987682c629c1d2c476f35f6fde405a5e304a4Fixed06d9895f265282e939a8933bb18de82eba2b4dda
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfb0987682c629c1d2c476f35f6fde405a5e304a4Fixed7fb39882b20c98a9a393c244c86b56ef6933cff8
Affected versions
v6.*
v6.10
v6.10-rc4
v6.10-rc5
v6.10-rc6
v6.10-rc7
v6.11
v6.11-rc1
v6.11-rc2
v6.11-rc3
v6.11-rc4
v6.11-rc5
v6.11-rc6
v6.11-rc7
v6.12
v6.12-rc1
v6.12-rc2
v6.12-rc3
v6.12-rc4
v6.12-rc5
v6.12-rc6
v6.12-rc7
v6.12.1
v6.12.10
v6.12.11
v6.12.12
v6.12.13
v6.12.14
v6.12.15
v6.12.16
v6.12.17
v6.12.2
v6.12.3
v6.12.4
v6.12.5
v6.12.6
v6.12.7
v6.12.8
v6.12.9
v6.13
v6.13-rc1
v6.13-rc2
v6.13-rc3
v6.13-rc4
v6.13-rc5
v6.13-rc6
v6.13-rc7
v6.13.1
v6.13.2
v6.13.3
v6.13.4
v6.13.5
v6.14-rc1
v6.14-rc2
v6.14-rc3
Database specific
vanir_signatures
[
{
"signature_type": "Function",
"deprecated": false,
"digest": {
"length": 4220.0,
"function_hash": "277467431219640690907589682232605333299"
},
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@06d9895f265282e939a8933bb18de82eba2b4dda",
"target": {
"file": "drivers/md/dm-integrity.c",
"function": "dm_integrity_status"
},
"id": "CVE-2025-21874-3aecbbd2"
},
{
"signature_type": "Line",
"deprecated": false,
"digest": {
"line_hashes": [
"308713468096852423892379153026048751750",
"216851023026917724919811382121637307967",
"33366720989713732204722929490141970686",
"321886388463027330063442485511478167589",
"23249630846692683988826481666460529624",
"222706648543472188919583656765426728790",
"147440551330044093064702032843972270802",
"57426014117957108704803381691784296333",
"207181574259721814608558494085236924761",
"198395002344503848355176333678340658738"
],
"threshold": 0.9
},
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@06d9895f265282e939a8933bb18de82eba2b4dda",
"target": {
"file": "drivers/md/dm-integrity.c"
},
"id": "CVE-2025-21874-43944d40"
}
]