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CVE-2025-38162

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_pipapo: prevent overflow in lookup table allocation When calculating the lookup table size, ensure the follo…

Published Jul 3, 2025EPSS 0.18%

Overview

CVE-2025-38162 is a high-severity vulnerability. It was published on July 3, 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: nft_set_pipapo: prevent overflow in lookup table allocation

When calculating the lookup table size, ensure the following

multiplication does not overflow:

- desc->field_len[] maximum value is U8_MAX multiplied by

NFT_PIPAPO_GROUPS_PER_BYTE(f) that can be 2, worst case.

- NFT_PIPAPO_BUCKETS(f->bb) is 2^8, worst case.

- sizeof(unsigned long), from sizeof(*f->lt), lt in

struct nft_pipapo_field.

Then, use check_mul_overflow() to multiply by bucket size and then use

check_add_overflow() to the alignment for avx2 (if needed). Finally, add

lt_size_check_overflow() helper and use it to consolidate this.

While at it, replace leftover allocation using the GFP_KERNEL to

GFP_KERNEL_ACCOUNT for consistency, in pipapo_resize().

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/43fe1181f738295624696ae9ff611790edb65b5eRefgit.kernel.org/stable/c/4c5c6aa9967dbe55bd017bb509885928d0f31206Refgit.kernel.org/stable/c/91edc076439c9e2f34b176149f1c84a47a8ec32fRefgit.kernel.org/stable/c/a9e757473561da93c6a4136f0e59aba91ec777fcRefgit.kernel.org/stable/c/c1360ac8156c0a3f2385baef91d8d26fd9d39701Refcert-portal.siemens.com/productcert/html/ssa-019113.htmlRefcert-portal.siemens.com/productcert/html/ssa-082556.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38162?

CVE-2025-38162 is a high-severity vulnerability. It was published on July 3, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-38162?

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-2025-38162?

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-2025-38162?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38162 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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