Vulnerability 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().
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.6, < 6.12.34 |
References
- https://git.kernel.org/stable/c/43fe1181f738295624696ae9ff611790edb65b5ePatch
- https://git.kernel.org/stable/c/4c5c6aa9967dbe55bd017bb509885928d0f31206Patch
- https://git.kernel.org/stable/c/91edc076439c9e2f34b176149f1c84a47a8ec32f
- https://git.kernel.org/stable/c/a9e757473561da93c6a4136f0e59aba91ec777fcPatch
- https://git.kernel.org/stable/c/c1360ac8156c0a3f2385baef91d8d26fd9d39701Patch
FAQ
What is CVE-2025-38162?
CVE-2025-38162 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 followin...
How severe is CVE-2025-38162?
CVE-2025-38162 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-38162?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.