CVE-2026-31472: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: xfrm: iptfs: validate inner IPv4 header length in IPTFS payload Add validation of the inner IPv4 packet tot_len and ihl fields parsed from decrypted IPTFS payloads in __input_process_payload(). A crafted ESP packet containing an inner IPv4 header with tot_len=0 causes an infinite loop: iplen=0 leads to capturelen=min(0, remaining)=0, so the data offset never advances and the while(data < tail) loop never terminates, spinning forever in softirq context. Reject inner IPv4 packets where tot_len < ihl*4 or ihl*4 < sizeof(struct iphdr), which catches both the tot_len=0 case and malformed ihl values. The normal IP stack performs this validation in ip_rcv_core(), but IPTFS extracts and processes inner packets before they reach that layer.

Засегнати продукти

• Linux Linux: 6c82d2433671819a550227bf65bfb6043e3d3305 преди de6d8e8ce5187f7402c9859b443355e7120c5f09; 6c82d2433671819a550227bf65bfb6043e3d3305 преди 3db7d4f777a00164582061ccaa99569cd85011a3; 6c82d2433671819a550227bf65bfb6043e3d3305 преди 0d10393d5eac33cbd92f7a41fddca12c41d3cb7e
• Linux Linux: 6.14; преди 6.14; 6.18.21 до 6.18.*; 6.19.11 до 6.19.*; 7.0 до *

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-31472
• https://nvd.nist.gov/vuln/detail/CVE-2026-31472
• https://git.kernel.org/stable/c/de6d8e8ce5187f7402c9859b443355e7120c5f09
• https://git.kernel.org/stable/c/3db7d4f777a00164582061ccaa99569cd85011a3
• https://git.kernel.org/stable/c/0d10393d5eac33cbd92f7a41fddca12c41d3cb7e