What’s Vulnerable › Vulnerabilities

CVE-2023-53033: netfilter: nft_payload: incorrect arithmetics when fetching VLAN header bits

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-27 · updated 2026-08-04

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_payload: incorrect arithmetics when fetching VLAN header bits If the offset + length goes over the ethernet + vlan header, then the length is adjusted to copy the bytes that are within the boundaries of the vlan_ethhdr scratchpad area. The remaining bytes beyond ethernet + vlan header are copied directly from the skbuff data area. Fix incorrect arithmetic operator: subtract, not add, the size of the vlan header in case of double-tagged packets to adjust the length accordingly to address CVE-2023-0179.

Affected products

• Linux kernel: from 5.5 before 5.10.164; from 5.11 before 5.15.89; from 5.16 before 6.1.7; 6.2-rc1, 6.2-rc2, 6.2-rc3, 6.2-rc4 — fixed in 5.10.164, 5.15.89, 6.1.7

How to fix

Upgrade to a fixed version: Linux kernel 5.10.164, 5.15.89, 6.1.7. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/550efeff989b041f3746118c0ddd863c39ddc1aa
• https://git.kernel.org/stable/c/696e1a48b1a1b01edad542a1ef293665864a4dd0
• https://git.kernel.org/stable/c/76ef74d4a379faa451003621a84e3498044e7aa3
• https://git.kernel.org/stable/c/a8acfe2c6fb99f9375a9325807a179cd8c32e6e3

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