netfilter: nft_set_pipapo: prevent overflow in lookup table allocation
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().
CVE-2025-38162
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-38162
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3c4287f62044a90e73a561aa05fc46e62da173da",
"lessThan": "91edc076439c9e2f34b176149f1c84a47a8ec32f",
"versionType": "git"
},
{
"status": "affected",
"version": "3c4287f62044a90e73a561aa05fc46e62da173da",
"lessThan": "a9e757473561da93c6a4136f0e59aba91ec777fc",
"versionType": "git"
},
{
"status": "affected",
"version": "3c4287f62044a90e73a561aa05fc46e62da173da",
"lessThan": "c1360ac8156c0a3f2385baef91d8d26fd9d39701",
"versionType": "git"
},
{
"status": "affected",
"version": "3c4287f62044a90e73a561aa05fc46e62da173da",
"lessThan": "43fe1181f738295624696ae9ff611790edb65b5e",
"versionType": "git"
},
{
"status": "affected",
"version": "3c4287f62044a90e73a561aa05fc46e62da173da",
"lessThan": "4c5c6aa9967dbe55bd017bb509885928d0f31206",
"versionType": "git"
}
],
"programFiles": [
"net/netfilter/nft_set_pipapo.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.167",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.125",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.34",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.15.3",
"versionType": "semver",
"lessThanOrEqual": "6.15.*"
},
{
"status": "unaffected",
"version": "6.16",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/netfilter/nft_set_pipapo.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-38162
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30532 · Revision 1
- Added to Heist Feed
- Publisher date