Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-05-01), indicating real-world exploitation has been confirmed by US federal agencies. A secondary CVSS source baseline 7.8 retained for reference (NVD's own analysis pending). Confidence: HIGH.
A fix is available — apply it.
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.
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
CISA SSVCTrack at low, Attend at medium and Act at high mission impact.
A fix is available. Apply it within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact.
Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
April 22, 2026
September 8, 2026
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Red Hat Security Advisory: kernel security, bug fix, and enhancement update
crypto: algif_aead - Revert to operating out-of-place
GCP-2026-028 — Published: 2026-05-05Updated: 2026-05-27Description Description Severity Notes CVE-2026-31431, also known as "Copy Fail," is a…
GCP-2026-026 — Published: 2026-04-30Updated: 2026-05-04Description Description Severity Notes 2026-05-04 Update: Added patch versions for GKE. A…
Red Hat Security Advisory: kernel security update
Red Hat Security Advisory: kernel security update
Red Hat Security Advisory: OpenShift Container Platform 4.15.64 bug fix and security update
Red Hat Security Advisory: OpenShift Container Platform 4.14.65 bug fix and security update
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 5.10.103-1 ... 5.10.92-2 (50 versions) |
| — |
| linux-6.1 | 6.1.106-3~deb11u1 ... 6.1.164-1~deb11u1 (16 versions) |
| — |
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 6.1.106-1 ... 6.1.99-1 (48 versions) |
| — |
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions) |
| — |
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 6.12.100-1 ... 6.19~rc8-1~exp1 (126 versions) |
| — |
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
RHSA-2026:13565 — Important
RHSA-2026:13566 — Important
RHSA-2026:13690 — Important
RHSA-2026:13727 — Important
RHSA-2026:13729 — Important
RHSA-2026:13811 — Important
RHSA-2026:13862 — Important
RHSA-2026:13885 — Important
RHSA-2026:13887 — Important
RHSA-2026:14097 — Important
RHSA-2026:14112 — Important
RHSA-2026:14926 — Important
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 1,645 total refreshes for this CVE.
Working exploit code is in the public domain (1 Metasploit module) (9 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
Copy Fail AF_ALG + authencesn Page-Cache Write
Open source ↗CVE-2026-31431-killed page-cache exploit — code exec into containers sharing the same image layer
Open source ↗Research artifacts, PoC scripts, and lab assets for the Copy Fail Linux local privilege escalation writeup on https://4xura.com/binex/kernel/copy-fail
Open source ↗CVE-2026-31431 (Copy Fail) — Análisis y desarrollo en Ensamblador x86-64 | Analysis and development in x86-64 Assembly
Open source ↗A Bash implementation of copyfail (CVE-2026-31431)
Open source ↗Read-only checker for CVE-2026-31431 (algif_aead local root). Reports kernel/module state and suggests mitigations.
Open source ↗Simple Ansible Playbook to mitigate against CopyFail (CVE-2026-31431) and DirtyFrag (CVE-2026-43284) vulnerabilities.
Open source ↗Detector + PoC for Linux page-cache write vulnerabilities: Copy Fail (CVE-2026-31431) and Dirty Frag (CVE-2026-43284/43500). Authorized security research only.
Open source ↗Vulnerability detection and mitigation tool for Copy Fail and Dirty Frag bugs (CVE-2026-31431, CVE-2026-43284, CVE-2026-43500)
Open source ↗Exploit CVE-2026-31431 on Linux using a Rust implementation to achieve local privilege escalation via an arbitrary page cache write primitive.
Open source ↗redhat:RHSA-2026:13565 · ubuntu:USN-8277-1 · redhat:RHSA-2026:13566
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-31431
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.