What is CVE-2023-32249?

CVE-2023-32249 is a critical-severity vulnerability in Linux. CVSS score: 9.1/10. Published 2025-08-16.

How severe is CVE-2023-32249?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2023-32249 known to be exploited?

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

Vulnerability in Linux

CVE-2023-32249

In the Linux kernel, the following vulnerability has been resolved: ksmbd: not allow guest user on multichannel This patch return STATUS_NOT_SUPPORTED if binding session is guest.

Published 2025-08-16 · last modified 2026-08-15.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (25.7th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Linux — versions 6.3.2, 5.15.112, 0626e6641f6b467447c81dd7678a69c66f7746cf
Linux Kernel

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

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

Frequently asked questions

What is CVE-2023-32249?: CVE-2023-32249 is a critical-severity vulnerability in Linux. CVSS score: 9.1/10. Published 2025-08-16.
How severe is CVE-2023-32249?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2023-32249 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.