CVE-2026-31518
Medium
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.
SeverityMedium
CVSS5.5
Exploit probability3. percentile0.1%
Product
Linux Kernel
PublishedApr 22, 2026
First seenApr 22, 2026
Weakness typeCWE-401CWE-401
How to fix
Update
- linux linux_kernel5.10.253, 5.15.203, 6.1.168, 6.6.131, 6.12.80, 6.18.21, 6.19.11 or later
Patches
- git.kernel.org/stable/c/0c0eef8ccd2413b0a10eb6bbd3442333b1e64dd2
- git.kernel.org/stable/c/41aafca57de4a4c026701622bd4648f112a9edcd
- git.kernel.org/stable/c/4820847e036ff1035b01b69ad68dfc17e7028fe9
- git.kernel.org/stable/c/6a3ec6efbc4f90e0ccb2e71574f07351f19996f4
- git.kernel.org/stable/c/6aa9841d917532d0f2d932d1ff2f3a94305aaf47
- git.kernel.org/stable/c/88d386243ed374ac969dabd3bbc1409a31d81818
- git.kernel.org/stable/c/aca3ad0c262f54a5b5c95dda80a48365997d1224
- git.kernel.org/stable/c/df6f995358dc1f3c42484f5cfe241d7bd3e1cd15
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.6 ≤ v < 5.10.253, 5.11 ≤ v < 5.15.203, 5.16 ≤ v < 6.1.168, 6.2 ≤ v < 6.6.131, 6.7 ≤ v < 6.12.80, 6.13 ≤ v < 6.18.21, 6.19 ≤ v < 6.19.11, 7.0 | 5.10.253, 5.15.203, 6.1.168, 6.6.131, 6.12.80, 6.18.21, 6.19.11 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.