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CVE-2026-98029

7.0 · HIGH

In the Linux kernel, the following vulnerability has been resolved: eth: nfp: bound the ntuple rule dump by the caller's buffer size nfp_net_get_fs_loc() dumps every entry of nn->fs.list into rul…

Published Sep 25, 2026EPSS 0.12%

Overview

CVE-2026-98029 is a high-severity vulnerability. It was published on September 25, 2026 and has a CVSS 3.1 base score of 7.0 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

eth: nfp: bound the ntuple rule dump by the caller's buffer size

nfp_net_get_fs_loc() dumps every entry of nn->fs.list into rule_locs[]

without consulting cmd->rule_cnt, which is how many entries the caller

had room for. ETHTOOL_GRXCLSRLALL requires no CAP_NET_ADMIN and the

ioctl sizes the buffer from the rule_cnt userspace passes in, so once an

admin has installed flow steering rules any user can ask for fewer slots

than there are rules and run off the end of the allocation. A rule_cnt

of 0 leaves the buffer pointer NULL and the walk dereferences it.

Bail out with -EMSGSIZE when the buffer fills up, the way the other

ntuple capable drivers do, and report how many locations were filled so

a shrinking rule list does not leave the caller reading stale slots.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/82812583b9c69c241da6da4186f14e9df2516488Refgit.kernel.org/stable/c/a7e023c63e855761c1426cee8d17c2bca32aa339Refgit.kernel.org/stable/c/ecebfdaab72a504c10f4907bd00fc3b705ec3b12Refgit.kernel.org/stable/c/f1986bf87b0709c95126fe196cf39e5b8c8453a1

How CyberStrike helps

Frequently asked questions

What is CVE-2026-98029?

CVE-2026-98029 is a high-severity vulnerability. It was published on September 25, 2026 and has a CVSS 3.1 base score of 7.0 (HIGH).

How severe is CVE-2026-98029?

This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-98029?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-98029?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-98029 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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