What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-29 · updated 2026-10-15

Description

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.

Affected products

• Debian Linux: 11.0
• Linux kernel: from 3.3 before 5.4.294; from 5.5 before 5.10.238; from 5.11 before 5.15.183; from 5.16 before 6.1.139; from 6.2 before 6.6.91; from 6.7 before 6.12.29 — fixed in 5.10.238, 5.15.183, 5.4.294, 6.1.139, 6.12.29, 6.14.7

How to fix

Upgrade to a fixed version: Linux kernel 5.10.238, 5.15.183, 5.4.294, 6.1.139. Check the vendor advisory for mitigations.

References

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

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