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CVE-2025-37924

Linux Kernel use-after-free

9.8 CRITICALEPSS 21.2%
  1. Published20 May 2025

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in kerberos authentication Setting sess->user = NULL was introduced to fix the dangling pointer created by ksmbd_free_user. However, it is possible another thread could be operating on the session and make use of sess->user after it has been passed to ksmbd_free_user but before sess->user is set to NULL.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Debian Linux11.0
Linux Kernel≥ 5.15 < 6.1.138 · ≥ 6.13 < 6.14.6 · ≥ 6.2 < 6.6.90 · ≥ 6.7 < 6.12.28

Remediation

Fixed in
Linux Kernel≥ 6.1.138

References

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Frequently asked

Is CVE-2025-37924 being actively exploited?

CVE-2025-37924 is not in the CISA KEV catalog. Its EPSS exploit probability is 21.2%.

How severe is CVE-2025-37924?

CVE-2025-37924 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 21.2% probability of exploitation.

Which products are affected by CVE-2025-37924?

Affected products include Debian Linux, Linux Kernel.

How do I fix CVE-2025-37924?

Upgrade affected software to a fixed version, for example Linux Kernel 6.1.138 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.