CVE-2025-21874
Full vulnerability record from the local CVENow database.
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] ...
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-03-27 15:15:55.203000
Last modified
2026-11-05 21:17:44.630000
View original CVE JSON
{
"id": "CVE-2025-21874",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-03-27T15:15:55.203",
"lastModified": "2026-11-05T21:17:44.630",
"vulnStatus": "Analyzed",
"cveTags": [],
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-integrity: Avoid divide by zero in table status in Inline mode\n\nIn Inline mode, the journal is unused, and journal_sectors is zero.\n\nCalculating the journal watermark requires dividing by journal_sectors,\nwhich should be done only if the journal is configured.\n\nOtherwise, a simple table query (dmsetup table) can cause OOPS.\n\nThis bug did not show on some systems, perhaps only due to\ncompiler optimization.\n\nOn my 32-bit testing machine, this reliably crashes with the following:\n\n : Oops: divide error: 0000 [#1] PREEMPT SMP\n : CPU: 0 UID: 0 PID: 2450 Comm: dmsetup Not tainted 6.14.0-rc2+ #959\n : EIP: dm_integrity_status+0x2f8/0xab0 [dm_integrity]\n ..."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dm-integrity: Evitar la división por cero en el estado de la tabla en modo en línea. En modo en línea, el diario no se utiliza y journal_sectors es cero. Calcular la marca de agua del diario requiere dividir por journal_sectors, lo cual solo debe hacerse si el diario está configurado. De lo contrario, una simple consulta de tabla (dmsetup table) puede causar un error OOPS. Este error no se presentó en algunos sistemas, quizás solo debido a la optimización del compilador. En mi equipo de pruebas de 32 bits, esto falla de forma fiable con el siguiente error: : 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] ..."
}
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"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
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