What’s Vulnerable › Vulnerabilities

CVE-2025-37789: net: openvswitch: fix nested key length validation in the set() action

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-01 · updated 2026-07-30

Description

In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: fix nested key length validation in the set() action It's not safe to access nla_len(ovs_key) if the data is smaller than the netlink header. Check that the attribute is OK first.

Affected products

• Debian Linux: 11.0
• Linux kernel: from 3.3 before 5.4.293; from 5.5 before 5.10.237; from 5.11 before 5.15.181; from 5.16 before 6.1.135; from 6.2 before 6.6.88; from 6.7 before 6.12.25 — fixed in 5.10.237, 5.15.181, 5.4.293, 6.1.135, 6.12.25, 6.14.4

How to fix

Upgrade to a fixed version: Linux kernel 5.10.237, 5.15.181, 5.4.293, 6.1.135. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/03d7262dd53e8c404da35cc81aaa887fd901f76b
• https://git.kernel.org/stable/c/1489c195c8eecd262aa6712761ba5288203e28ec
• https://git.kernel.org/stable/c/54c6957d1123a2032099b9eab51c314800f677ce
• https://git.kernel.org/stable/c/65d91192aa66f05710cfddf6a14b5a25ee554dba
• https://git.kernel.org/stable/c/7fcaec0b2ab8fa5fbf0b45e5512364a168f445bd
• https://git.kernel.org/stable/c/824a7c2df5127b2402b68a21a265d413e78dcad7
• https://git.kernel.org/stable/c/a27526e6b48eee9e2d82efff502c4f272f1a91d4
• https://git.kernel.org/stable/c/be80768d4f3b6fd13f421451cc3fee8778aba8bc
• https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
• https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

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