CVE-2026-31518

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.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 2% of CVEs (scores of 2026-10-25)

CWE

CWE-401

Published

2026-04-22

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/0c0eef8ccd2413b0a10eb6bbd3442333b1e64dd2
• https://git.kernel.org/stable/c/41aafca57de4a4c026701622bd4648f112a9edcd
• https://git.kernel.org/stable/c/4820847e036ff1035b01b69ad68dfc17e7028fe9
• https://git.kernel.org/stable/c/6a3ec6efbc4f90e0ccb2e71574f07351f19996f4
• https://git.kernel.org/stable/c/6aa9841d917532d0f2d932d1ff2f3a94305aaf47

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