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VulnerabilityPublished Updated

CVE-2025-38519: Linux kernel · mm/damon: fix divide by zero in damon_get_intervals_score()

Source GCVE Database

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Not known to be exploited · CVSS 5.5 Medium.

Data as of 13 Nov 2026, 20:18 UTC

CVSS 3.1 base score
5.5Medium
How severe the flaw is on the 0–10 CVSS scale.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Aug 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

What to do

AI-suggested

A patch has been released that fixes the divide-by-zero error in damon_get_intervals_score(). Users should apply the official kernel updates containing this fix. Since the patch maintains backward compatibility by allowing zero-size regions, no additional configuration changes are required.

Description

CVE-2025-38519 is a vulnerability in the Linux kernel's mm/damon subsystem where a divide-by-zero error occurs in the damon_get_intervals_score() function. This happens when the region size is zero or when intervals_goal.access_bp is zero, causing a kernel crash (Oops). The issue is fixed by a patch that prevents the divide-by-zero without disallowing zero-size regions to maintain backward compatibility.

References

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