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CVE-2022-49698

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: netfilter: use get_random_u32 instead of prandom bh might occur while updating per-cpu rnd_state from user context, ie.

Published Feb 26, 2025EPSS 0.30%

Overview

CVE-2022-49698 is a high-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, 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:

netfilter: use get_random_u32 instead of prandom

bh might occur while updating per-cpu rnd_state from user context,

ie. local_out path.

BUG: using smp_processor_id() in preemptible [00000000] code: nginx/2725

caller is nft_ng_random_eval+0x24/0x54 [nft_numgen]

Call Trace:

check_preemption_disabled+0xde/0xe0

nft_ng_random_eval+0x24/0x54 [nft_numgen]

Use the random driver instead, this also avoids need for local prandom

state. Moreover, prandom now uses the random driver since d4150779e60f

("random32: use real rng for non-deterministic randomness").

Based on earlier patch from Pablo Neira.

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/15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783bRefgit.kernel.org/stable/c/6ce71f83f798be7e1ca68707fec449fbecb38852Refgit.kernel.org/stable/c/b1fd94e704571f98b21027340eecf821b2bdffbaRefgit.kernel.org/stable/c/d0906b0fffc9f19bc42708ca3e84e2089088386c

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49698?

CVE-2022-49698 is a high-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-49698?

This vulnerability has a CVSS 3.1 base score of 7.8, 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-2022-49698?

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-2022-49698?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49698 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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