Linux Kernel Vulnerability copy.fail - CVE-2026-31431 Fortinet PSIRT Advisories Fortinet PSIRT Contact: Website: https://fortiguard.fortinet.com/faq/psirt-contact FG-IR-26-139 Final 1 1 2026-05-13T00:00:00 Current version 2026-05-13T00:00:00 2026-05-13T00:00:00 CVE-2026-31431In 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. None Escalation of privilege None https://fortiguard.fortinet.com/psirt/FG-IR-26-139 Linux Kernel Vulnerability copy.fail - CVE-2026-31431 https://nvd.nist.gov/vuln/detail/CVE-2026-31431 https://nvd.nist.gov/vuln/detail/CVE-2026-31431 CVE-2026-31431 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X https://fortiguard.fortinet.com/psirt/FG-IR-26-139 Linux Kernel Vulnerability copy.fail - CVE-2026-31431 Reference> https://nvd.nist.gov/vuln/detail/CVE-2026-31431 https://nvd.nist.gov/vuln/detail/CVE-2026-31431