What is CVE-2025-39793?

CVE-2025-39793 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2025-09-12.

How severe is CVE-2025-39793?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Linux

CVE-2025-39793

In the Linux kernel, the following vulnerability has been resolved: io_uring/memmap: cast nr_pages to size_t before shifting If the allocated size exceeds UINT_MAX, then it's necessary to cast the mr->nr_pages value to size_t to prevent…

EPSS: 0.001 (3.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 087f997870a948820ec366701d178f402c6a23a3, 6.14, 0
Linux Linux_kernel

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2025-39793?: CVE-2025-39793 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2025-09-12.
How severe is CVE-2025-39793?: High severity. CVSS v3 base score is 7.8 out of 10.