CVE-2026-31431
crypto: algif_aead - Revert to operating out-of-place
- Published
- Apr 22, 2026
- Updated
- Oct 15, 2026
- Assigning CNA
- Linux
- Evidence observed
- May 1, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 88.8%
- Model date
- Oct 17, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
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.
Sources
modules/exploits/linux/local/cve_2026_31431_copy_fail.rb
Metasploit Framework modulesDeclared conditions
- platform: Linux,Unix($.exploit_linux/local/cve_2026_31431_copy_fail.platform)
- verification: check_declared($.exploit_linux/local/cve_2026_31431_copy_fail.check)
- CVE-2026-31431-CopyFailExploit
Proof-of-concept exploit for CVE-2026-31431 (Copy Fail), a Linux kernel LPE via algif_aead page-cache corruption, with detection, lab, and mitigation guidance.
Responsible use
Use vulnerability information only on systems you own or are authorized to test. Kitploit links to public research metadata and does not store exploit code or malicious payloads.