CVE-2025-37844 | cifs: avoid NULL pointer dereference in dbg call

In the Linux kernel, the following vulnerability has been resolved: cifs: avoid NULL pointer dereference in dbg call cifs_server_dbg() implies server to be non-NULL so move call under condition to avoid NULL pointer dereference. Found by Linux Verification Center (linuxtesting.org) with SVACE.

Published: 2025-05-09 Last update: 2025-11-17 Assigner: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-37844 is rated Low Risk (29.2/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.07%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-37844

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-05 0.01% 0.07% +0.05%
2 2025-11-18 0.06% 0.01% -0.05%
3 2025-11-04 — 0.06% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-37844

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 [email protected]

Weakness enumeration for CVE-2025-37844

OS Trackers for CVE-2025-37844

vendor priority summary link
debian not yet assigned CVE-2025-37844 not yet assigned priority: Debian including 2 source packages (linux, linux-6.1), 6 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 6. https://security-tracker.debian.org/tracker/CVE-2025-37844
redhat medium — https://access.redhat.com/security/cve/CVE-2025-37844
suse medium CVE-2025-37844 severity moderate: SUSE including 423 source package names (15.7.20.5.1:kernel-default-6.4.0-150700.53.6.1, 2.1.3-7.43:kernel-rt-6.4.0-33.1, …), 758 product×package rows across 143 product lines (Container suse/hpc/warewulf4-x86_64/sle-hpc-node, Container suse/sl-micro/6.0/rt-os-container, … (143 product lines)): Fixed 504, Known Affected 231, Known Not Affected 23. https://www.suse.com/security/cve/CVE-2025-37844/
ubuntu medium CVE-2025-37844 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1551 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1145, ignored 164, released 162, not-affected 74, needed 3, needs-triage 2, pending 1. https://ubuntu.com/security/CVE-2025-37844

Affected software / configurations for CVE-2025-37844

Vendor Product Version Raw CPE
linux linux_kernel >= 5.6.7, < 5.10.237 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 5.11, < 5.15.181 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 5.16, < 6.1.135 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.2, < 6.6.88 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.7, < 6.12.24 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.13, < 6.13.12 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.14, < 6.14.3 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
debian debian_linux 11.0 cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

References for CVE-2025-37844

URL Tags
https://git.kernel.org/stable/c/20048e658652e731f5cadf4a695925e570ca0ff9 Patch
https://git.kernel.org/stable/c/6c14ee6af8f1f188b668afd6d003f7516a507b08 Patch
https://git.kernel.org/stable/c/864ba5c651b03830f36f0906c21af05b15c1aaa6 Patch
https://git.kernel.org/stable/c/9c9000cb91b986eb7f75835340c67857ab97c09b Patch
https://git.kernel.org/stable/c/b2a1833e1c63e2585867ebeaf4dd41494dcede4b Patch
https://git.kernel.org/stable/c/b4885bd5935bb26f0a414ad55679a372e53f9b9b Patch
https://git.kernel.org/stable/c/ba3ce6c60cd5db258687dfeba9fc608f5e7cadf3 Patch
https://git.kernel.org/stable/c/e0717385f5c51e290c2cd2ad4699a778316b5132 Patch
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html Mailing List
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html Mailing List
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