Linux Kernel Incorrect Resource Transfer Between Spheres Vulnerability
Linux — Linux
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.
7.8
99.9%
Vector breakdown
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Published
- Apr 22, 2026
- Modified
- Sep 8, 2026
- Added to KEV
- May 1, 2026
- Federal patch due
- May 15, 2026
CISA required action
"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
8 foundWeaponization
Public repositories whose name or description references CVE-2026-31431, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
- theori-io/copy-fail-CVE-2026-31431★ 4079
Copy Fail (CVE-2026-31431): 9-year-old Linux kernel LPE found by Theori's Xint Code
updated Oct 17, 2026
- rootsecdev/cve_2026_31431★ 576
Exploit POC for CVE_2026_31431
updated Oct 16, 2026
- tgies/copy-fail-c★ 447
Cross-platform C port of the Copy Fail Linux LPE (CVE-2026-31431). Disclosed 2026-04-29 by Theori / Xint.
updated Oct 13, 2026
- badsectorlabs/copyfail-go★ 360
A Go implementation of copyfail (CVE-2026-31431)
updated Oct 16, 2026
- Percivalll/Copy-Fail-CVE-2026-31431-Kubernetes-PoC★ 192
PoC: fully unprivileged container escape to node-level code execution on Kubernetes via CVE-2026-31431 page-cache corruption + shared image layers. Validated on Alibaba Cloud ACK, Amazon EKS and Google GKE.
updated Oct 16, 2026
- Sndav/CVE-2026-31431-Advanced-Exploit★ 114
CVE-2026-31431 纯文件利用
updated Oct 15, 2026
- painoob/Copy-Fail-Exploit-CVE-2026-31431★ 109
Most Linux LPEs need a race window or a kernel-specific offset. Copy Fail is a straight-line logic flaw, it needs neither. The same 732-byte Python script (or .c elf) roots every Linux distribution shipped since 2017.
updated Sep 19, 2026
- sgkdev/page_inject★ 77
CVE-2026-31431-killed page-cache exploit — code exec into containers sharing the same image layer
updated Oct 13, 2026
References
Frequently asked questions
What is CVE-2026-31431?
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.
How severe is CVE-2026-31431?
CVE-2026-31431 has a CVSS base score of 7.8 out of 10 (CVSS 3.1).
Is CVE-2026-31431 actively exploited in the wild?
Yes. CVE-2026-31431 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added May 1, 2026, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2026-31431?
99.9% - meaning FIRST.org's EPSS model estimates a 99.9% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2026-31431?
We found 8 public GitHub repositories referencing CVE-2026-31431, though none matched a known Nuclei template or Metasploit module at last check. Review each one before relying on it - see the proof-of-concept section above.
What type of vulnerability is CVE-2026-31431?
CVE-2026-31431 is classified under CWE-669, CWE-1288 (CWE-669 Incorrect Resource Transfer Between Spheres).
Cross-checked against
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