CVE-2025-38162

Description

In the Linux kernel, the following vulnerability has been resolved:netfilter: nft_set_pipapo: prevent overflow in lookup table allocationWhen calculating the lookup table size, ensure the followingmultiplication 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 usecheck_add_overflow() to the alignment for avx2 (if needed). Finally, addlt_size_check_overflow() helper and use it to consolidate this.While at it, replace leftover allocation using the GFP_KERNEL toGFP_KERNEL_ACCOUNT for consistency, in pipapo_resize().

Risk Information

Associated Vulnerability

Patch Details

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234