CVE-2025-38162netfilter: nft_set_pipapo: prevent overflow in lookup table allocation
Updated under an hour ago ()
Does this affect you?
It affects Linux and 5 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from 3c4287f62044a90e73a561aa05fc46e62da173da before 91edc076439c9e2f34b176149f1c84a47a8ec32f; from 3c4287f62044a90e73a561aa05fc46e62da173da before a9e757473561da93c6a4136f0e59aba91ec777fc; from 3c4287f62044a90e73a561aa05fc46e62da173da before c1360ac8156c0a3f2385baef91d8d26fd9d39701; from 3c4287f62044a90e73a561aa05fc46e62da173da before 43fe1181f738295624696ae9ff611790edb65b5e; from 3c4287f62044a90e73a561aa05fc46e62da173da before 4c5c6aa9967dbe55bd017bb509885928d0f31206 | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 5.6 before 6.12.34; from 6.13 before 6.15.3 | NVD |
References
- https://git.kernel.org/stable/c/91edc076439c9e2f34b176149f1c84a47a8ec32f
- https://git.kernel.org/stable/c/a9e757473561da93c6a4136f0e59aba91ec777fcpatch
- https://git.kernel.org/stable/c/c1360ac8156c0a3f2385baef91d8d26fd9d39701patch
- https://git.kernel.org/stable/c/43fe1181f738295624696ae9ff611790edb65b5epatch
- https://git.kernel.org/stable/c/4c5c6aa9967dbe55bd017bb509885928d0f31206patch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.