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CVE-2026-31518 esp: fix skb leak with espintcp and async crypto

Description

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.

Affected products and versions

Product Affected versions Fixed in
Linux 7.0 earliest → < 7.0 7.0
Linux 6.19 earliest → < 6.19.11 6.19.11
Linux 6.18 earliest → < 6.18.21 6.18.21
Linux 6.12 earliest → < 6.12.80 6.12.80
Linux 6.6 earliest → < 6.6.131 6.6.131
Linux 6.1 earliest → < 6.1.168 6.1.168
Linux 5.15 earliest → < 5.15.203 5.15.203
Linux 5.10 earliest → < 5.10.253 5.10.253
Linux 5.6 No fix stated
Show the 3 other branches
Product Affected versions Fixed in
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1 3.1.7 → latest No fix stated
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1 3.1.7 → latest No fix stated
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1 3.1.7 → latest No fix stated

References

Timeline

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