https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Wed, 30 Sep 2026 16:16:09 +0000 https://vulnerability.circl.lu/vuln/cve-2026-31472 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>xfrm: iptfs: validate inner IPv4 header length in IPTFS payload</p> <p>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 &lt; tail) loop never terminates, spinning forever in softirq context.</p> <p>Reject inner IPv4 packets where tot_len &lt; ihl*4 or ihl*4 &lt; 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.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>xfrm: iptfs: validate inner IPv4 header length in IPTFS payload</p> <p>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 &lt; tail) loop never terminates, spinning forever in softirq context.</p> <p>Reject inner IPv4 packets where tot_len &lt; ihl*4 or ihl*4 &lt; 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.</p> https://vulnerability.circl.lu/vuln/cve-2026-31472