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Integer Overflow or Wraparound The advisory has been revoked - it doesn't affect any version of package kernel-headers  (opens in a new tab)

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  • Snyk IDSNYK-RHEL10-KERNELHEADERS-11208931
  • published30 Jul 2025
  • disclosed3 Jul 2025
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Introduced: 3 Jul 2025

CVE-2025-38162  (opens in a new tab)
CWE-190  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:10.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-headers package and not the kernel-headers package as distributed by RHEL.

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().