Buffer overflow in Linux

CVE-2025-37803

In the Linux kernel, the following vulnerability has been resolved: udmabuf: fix a buf size overflow issue during udmabuf creation by casting size_limit_mb to u64 when calculate pglimit.

Vulnerability class: Buffer Overflow

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.002 (13.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-37803: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

  • Linux — versions fbb0de795078190a9834b3409e4b009cfb18a6d4, 4.20, 0
  • Linux Kernel — versions 6.15

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-37803?
CVE-2025-37803 is a high-severity vulnerability in Linux, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2025-05-08.
How severe is CVE-2025-37803?
High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2025-37803 known to be exploited?
3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.