Integer overflow in Linux
CVE-2025-39940
In the Linux kernel, the following vulnerability has been resolved: dm-stripe: fix a possible integer overflow There's a possible integer overflow in stripe_io_hints if we have too large chunk size. Test if the overflow happened, and if it did, don't set limits->io_min and limits->io_opt;
Vulnerability class: Integer Overflow
EPSS: 0.001 (3.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Linux — versions 40bea431274c247425e7f5970d796ff7b37a2b22, 2.6.31, 0
- Linux Linux_kernel — versions 2.6.31, 6.17
Weakness classification (CWE)
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2025-39940?
- CVE-2025-39940 is a medium-severity vulnerability in Linux, classified under Integer Overflow or Wraparound. CVSS score: 5.5/10. Published 2025-10-04.
- How severe is CVE-2025-39940?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2025-39940 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.