CVE-2023-52628: Linux Kernel

High severity, CVSS 7.1. EPSS: 0.7% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: exthdr: fix 4-byte stack OOB write If priv->len is a multiple of 4, then dst[len / 4] can write past the destination array which leads to stack corruption. This construct is necessary to clean the remainder of the register in case ->len is NOT a multiple of the register size, so make it conditional just like nft_payload.c does. The bug was added in 4.1 cycle and then copied/inherited when tcp/sctp and ip option support was added. Bug reported by Zero Day Initiative project (ZDI-CAN-21950, ZDI-CAN-21951, ZDI-CAN-21961).

Affected products

• Linux Linux Kernel: from 4.1, before 5.10.198 (fixed in 5.10.198); from 5.11, before 5.15.132 (fixed in 5.15.132); from 5.16, before 6.1.54 (fixed in 6.1.54); from 6.2, before 6.5.4 (fixed in 6.5.4)

Published 2024-03-28. Last modified 2026-08-04.