What is CVE-2025-38737?

CVE-2025-38737 is a critical-severity vulnerability in Linux, classified under Use of Uninitialized Resource. CVSS score: 9.8/10. Published 2025-09-05.

How severe is CVE-2025-38737?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2025-38737 known to be exploited?

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

Vulnerability in Linux

CVE-2025-38737

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix oops due to uninitialised variable Fix smb3_init_transform_rq() to initialise buffer to NULL before calling netfs_alloc_folioq_buffer() as netfs assumes it can append to the buffer it is given. Setting it to NULL means it should start a fresh buffer, but the value is currently undefined.

EPSS: 0.001 (4.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions a2906d3316fc19bf0ade84618bb73eab604c447e, 6.12, 0
Linux Linux_kernel — versions 6.17

Weakness classification (CWE)

CWE-908 — Use of Uninitialized Resource

Public proof-of-concept exploits

w4zu/Debian_

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-2025-38737?: CVE-2025-38737 is a critical-severity vulnerability in Linux, classified under Use of Uninitialized Resource. CVSS score: 9.8/10. Published 2025-09-05.
How severe is CVE-2025-38737?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2025-38737 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.