netfilter: nft_set_pipapo: prevent overflow in lookup table allocation (Linux Linux)

CVE-2025-38162
HIGH 7.8

At a glance

Source
NVD
EPSS
EPSS 0.18 % · percentile 8 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

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().

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected 3c4287f62044a90e73a561aa05fc46e62da173da < 91edc076439c9e2f34b176149f1c84a47a8ec32f ; affected 3c4287f62044a90e73a561aa05fc46e62da173da < a9e757473561da93c6a4136f0e59aba91ec777fc ; affected 3c4287f62044a90e73a561aa05fc46e62da173da < c1360ac8156c0a3f2385baef91d8d26fd9d39701 ; affected 3c4287f62044a90e73a561aa05fc46e62da173da < 43fe1181f738295624696ae9ff611790edb65b5e ; affected 3c4287f62044a90e73a561aa05fc46e62da173da < 4c5c6aa9967dbe55bd017bb509885928d0f31206
Linux · Linuxaffected 5.6 ; unaffected 0 < 5.6 ; unaffected 6.1.167 ≤ 6.1.* ; unaffected 6.6.125 ≤ 6.6.* ; unaffected 6.12.34 ≤ 6.12.* ; unaffected 6.15.3 ≤ 6.15.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD