What is CVE-2025-38248?

CVE-2025-38248 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2025-07-09.

How severe is CVE-2025-38248?

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

Is CVE-2025-38248 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Use After Free in Linux

CVE-2025-38248

In the Linux kernel, the following vulnerability has been resolved: bridge: mcast: Fix use-after-free during router port configuration The bridge maintains a global list of ports behind which a multicast router resides. The list is consu…

Vulnerability class: Use-After-Free

EPSS: 0.002 (15.9th 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 2796d846d74a18cc6563e96eff8bf28c5e06f912, 5.15, 0
Linux Linux_kernel — versions 6.16

Weakness classification (CWE)

CWE-416 — Use After Free

Public proof-of-concept exploits

guard-wait/CVE-2025-38248_EXP

References

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

Frequently asked questions

What is CVE-2025-38248?: CVE-2025-38248 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2025-07-09.
How severe is CVE-2025-38248?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2025-38248 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.