CVE-2025-37998 | openvswitch: Fix unsafe attribute parsing in output_userspace()

In the Linux kernel, the following vulnerability has been resolved: openvswitch: Fix unsafe attribute parsing in output_userspace() This patch replaces the manual Netlink attribute iteration in output_userspace() with nla_for_each_nested(), which ensures that only well-formed attributes are processed.

Published: 2025-05-29 Last update: 2025-12-16 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-2025-37998 is rated Low Risk (24/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.16%). 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-2025-37998

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 2026-06-15 0.11% 0.16% +0.05%
2 2026-03-25 0.03% 0.11% +0.09%
3 2025-12-17 — 0.03% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-37998

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-2025-37998

OS Trackers for CVE-2025-37998

vendor priority summary link
debian not yet assigned CVE-2025-37998 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-2025-37998
redhat medium — https://access.redhat.com/security/cve/CVE-2025-37998
suse low CVE-2025-37998 severity low: SUSE including 426 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, …), 748 product×package rows across 141 product lines (Container suse/hpc/warewulf4-x86_64/sle-hpc-node, Container suse/sl-micro/6.0/rt-os-container, … (141 product lines)): Fixed 511, Known Affected 231, Known Not Affected 6. https://www.suse.com/security/cve/CVE-2025-37998/
ubuntu medium CVE-2025-37998 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 168, released 168, needed 44, not-affected 23, needs-triage 2, pending 1. https://ubuntu.com/security/CVE-2025-37998

Affected software / configurations for CVE-2025-37998

Vendor Product Version Raw CPE
linux linux_kernel >= 3.3, < 5.4.294 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 5.5, < 5.10.238 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 5.11, < 5.15.183 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 5.16, < 6.1.139 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.2, < 6.6.91 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.7, < 6.12.29 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.13, < 6.14.7 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel 6.15 cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*
linux linux_kernel 6.15 cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*
linux linux_kernel 6.15 cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*
linux linux_kernel 6.15 cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*
linux linux_kernel 6.15 cpe:2.3:o:linux:linux_kernel:6.15:rc5:*:*:*:*:*:*
debian debian_linux 11.0 cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

References for CVE-2025-37998

URL Tags
https://git.kernel.org/stable/c/0236742bd959332181c1fcc41a05b7b709180501 Patch
https://git.kernel.org/stable/c/06b4f110c79716c181a8c5da007c259807840232 Patch
https://git.kernel.org/stable/c/47f7f00cf2fa3137d5c0416ef1a71bdf77901395 Patch
https://git.kernel.org/stable/c/4fa672cbce9c86c3efb8621df1ae580d47813430 Patch
https://git.kernel.org/stable/c/6712dc21506738f5f22b4f68b7c0d9e0df819dbd Patch
https://git.kernel.org/stable/c/6beb6835c1fbb3f676aebb51a5fee6b77fed9308 Patch
https://git.kernel.org/stable/c/bca8df998cce1fead8cbc69144862eadc2e34c87 Patch
https://git.kernel.org/stable/c/ec334aaab74705cc515205e1da3cb369fdfd93cd Patch
https://www.zerodayinitiative.com/advisories/ZDI-25-307/ Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html Third Party Advisory
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