https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-09-30T19:12:03.441971+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2026-31518 CVE-2026-31518 — esp: fix skb leak with espintcp and async crypto 2026-09-30T19:12:03.792220+00:00

Affected: Linux, Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

In the Linux kernel, the following vulnerability has been resolved:

esp: fix skb leak with espintcp and async crypto

When the TX queue for espintcp is full, esp_output_tail_tcp will return an error and not free the skb, because with synchronous crypto, the common xfrm output code will drop the packet for us.

With async crypto (esp_output_done), we need to drop the skb when esp_output_tail_tcp returns an error.