CVE-2026-31431: listed in the CISA KEV catalog

CVE-2026-31431 · CVSS 7.8 HIGH · EPSS 99.9% · KEV 2026-05-01 · patch available

In the Linux kernel, the following vulnerability has been resolved: crypto: algif_aead - Revert to operating out-of-place This mostly reverts commit 72548b093ee3 except for the copying of the associated data. There is no benefit in operating in-place in algif_aead since the source and destination come from different mappings. Get rid of all the complexity added for in-place operation and just copy the AD directly.

Is CVE-2026-31431 exploited?

• Listed in the CISA KEV catalog on 2026-05-01.
• Federal remediation due 2026-05-15.
• Past that date by 92 days.
• EPSS puts exploitation in the next 30 days at 99.9%.
• Public exploit code: packaged in a public tool.

Which products and versions are affected?

No affected package list recorded here yet.

Is there a patch?

• CBL-Mariner Releases

What PlainSec published about CVE-2026-31431

• COS Kernel Flaws Let Containers Reach the Host (2026-05-02)

Primary sources

• NVD record
• CISA KEV catalog
• Metasploit: exploit/linux/local/cve_2026_31431_copy_fail

What this record does not say

• No affected package data.

KEV and EPSS are re-checked daily. Record last updated 2026-08-11.