High severity · published Apr 22, 2026
CVE-2026-31431
crypto: algif_aead - Revert to operating out-of-place
In wildKEV
7.8
CVSS
98.1%
EPSS
Yes
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)98.1% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed May 1, 2026
Federal remediation dueMay 15, 2026
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
4.14 before 5.10.254; 5.11 before 5.15.204; 5.16 before 6.1.170; 6.2 before 6.6.137; 6.7 before 6.12.85; 6.13 before 6.18.22; +7 more · source: NVD, KEV
LI
Linux · Linux
72548b093ee38a6d4f2a19e6ef1948ae05c181f7 before 893d22e0135fa394db81df88697fba6032747667; 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 before 19d43105a97be0810edbda875f2cd03f30dc130c; 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 before 961cfa271a918ad4ae452420e7c303149002875b; 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 before 3115af9644c342b356f3f07a4dd1c8905cd9a6fc; 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 before 8b88d99341f139e23bdeb1027a2a3ae10d341d82; 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 before fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8; +3 more · source: vendor
AL
Amazon Linux · Amazon
All versions, or not specified · source: NVD
BM
Basesystem Module · Suse
15; 15; 15; 15; 15; 15; +1 more · source: NVD
CP
Caas Platform · Suse
4.0 · source: NVD
CA
Cloudvision Agni · Arista
2024.4.0 through 2025.2.2 · source: NVD
CP
Cloudvision Portal · Arista
2024.2.0 through 2026.1.0 · source: NVD
DL
Debian Linux · Debian
11.0; 12.0; 13.0 · source: NVD
DT
Development Tools Module · Suse
15; 15; 15; 15; 15; 15; +1 more · source: NVD
EL
Enterprise Linux · Redhat
8.0; 9.0; 10.0 · source: NVD
EL
Enterprise Linux Aus · Redhat
8.4; 8.6 · source: NVD
EL
Enterprise Linux Eus · Redhat
8.4; 9.4; 9.6; 10.0 · source: NVD
In the news
VulnerabilityHigh
ABB Ability Edgenius
View CSAF
Summary
ABB is aware of public reports of a vulnerability CVE‑2026‑31431 (Copy Fail) in the product versions listed as affected in the advisory. An update is available that resolves a publicly reported vulnerability. CVE‑2026‑31431 (Copy Fail) is a Linux kernel vulnerability that may allow a locally authenticated user or compromised container workload to gain elevated (root) privileges on affected systems. Once root access is obtained, the attacker can effectively gain complete control of the system
The following versions of ABB Ability Edgenius are affected:
Ability Edgenius >=3.2.0.0|<3.2.4.1, 3.2.4.1 (CVE-2026-31431)
CVSS
Vendor
Equipment
Vulnerabilities
v3 7.8
ABB
ABB Ability Edgenius
Incorrect Resource Transfer Between Spheres
Background
Critical Infrastructure Sectors: Critical Manufacturing, Energy, Water and Wastewater, Chemical
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Switzerland
Vulnerabilities
Expand All +
CVE-2026-31431
A Linux kernel vulnerability that may allow a locally authenticated user or compromised container workload to gain elevated (root) privileges on affected systems. The issue originates in the Linux kernel’s cryptographic subsystem and impacts kernels used by most major Linux distributions released since 2017.Successful exploitation requires local code execution, however, in shared, containerized, or multi‑tenant env...
Sep 17, 2026·CISA Advisories
VulnerabilityHigh
ABB Ability Edgenius
View CSAF
Summary
ABB is aware of public reports of a vulnerability CVE‑2026‑31431 (Copy Fail) in the product versions listed as affected in the advisory. An update is available that resolves a publicly reported vulnerability. CVE‑2026‑31431 (Copy Fail) is a Linux kernel vulnerability that may allow a locally authenticated user or compromised container workload to gain elevated (root) privileges on affected systems. Once root access is obtained, the attacker can effectively gain complete control of the system
The following versions of ABB Ability Edgenius are affected:
Ability Edgenius >=3.2.0.0|<3.2.4.1 installed on ABB Ability Edgenius Gateway - bE100, >=3.2.0.0|<3.2.4.1 installed on ABB Ability Edgenius Gateway - E3100C, >=3.2.0.0|<3.2.4.1 installed on ABB Ability Edgenius Server - vE1000 (CVE-2026-31431, CVE-2026-31431, CVE-2026-31431)
CVSS
Vendor
Equipment
Vulnerabilities
v3 7.8
ABB
ABB Ability Edgenius
Incorrect Resource Transfer Between Spheres
Background
Critical Infrastructure Sectors: Critical Manufacturing
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Switzerland
Vulnerabilities
Expand All +
CVE-2026-31431
CVE‑2026‑31431 (Copy Fail) is a Linux kernel vulnerability that may allow a locally authenticated user or compromised container workload to gain elevated (root) privileges on affected systems. The issue originates in the Linux kerne...
Jul 14, 2026·CISA Advisories
VulnerabilityHigh
Impact of Linux Kernel vulnerabilities on B&R products
View CSAF
Summary
B&R is aware of publicly reported vulnerabilities affecting the Linux kernel versions shipped with the products listed as affected in the advisory. Successful local exploitation of these vulnerabilities could allow an attacker to escalate privileges on the affected system. Public proof-of-concept exploits are available for the vulnerabilities described herein. At the time of publication of this advisory, B&R had no evidence of active exploitation targeting B&R products.
The following versions of Impact of Linux Kernel vulnerabilities on B&R products are affected:
Linux for B&R <=12
APROL <APROL-AutoYaST-DVD- V4.4-010.10.260602
X20EDS410 /all
CVSS
Vendor
Equipment
Vulnerabilities
v3 7.8
B&R Industrial Automation GmbH
Impact of Linux Kernel vulnerabilities on B&R products
Incorrect Resource Transfer Between Spheres, Write-what-where Condition, Improper Privilege Management, Out-of-bounds Write, Multiple Releases of Same Resource or Handle
Background
Critical Infrastructure Sectors: Critical Manufacturing
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Switzerland
Vulnerabilities
Expand All +
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 assoc...
Jun 23, 2026·CISA Advisories
VulnerabilityHigh
Another Universal Linux Local Privilege Escalation (LPE) Vulnerability: Dirty Frag, (Fri, May 8th)
Less than two weeks after the public disclosure of the Copy Fail vulnerability (CVE-2026-31431), another local privilege escalation (LPE) vulnerability in the Linux kernel has been revealed. Referred to as "Dirty Frag," this vulnerability was discovered and reported by Hyunwoo Kim (@v4bel) [1]. In this diary, I will provide a brief background on Dirty Frag, and discuss its relationship to Copy Fail. I will then discuss how to mitigate Dirty Frag and outline recommended next steps for system owners. 
May 8, 2026·SANS Internet Storm Center
VulnerabilityHigh
Linux Kernel Dirty Frag LPE Exploit Enables Root Access Across Major Distributions
Details have emerged about a new, unpatched local privilege escalation (LPE) vulnerability impacting the Linux kernel.
Dubbed Dirty Frag, it has been described as a successor to Copy Fail (CVE-2026-31431, CVSS score: 7.8), a recently disclosed LPE flaw impacting the Linux kernel that has since come under active exploitation in the wild. The vulnerability was reported to Linux kernel maintainers
May 8, 2026·The Hacker News
VulnerabilityCritical
CVE-2026-31431: Copy Fail vulnerability enables Linux root privilege escalation across cloud environments
A high-severity Linux vulnerability, “Copy Fail” (CVE-2026-31431), enables root privilege escalation across cloud environments and Kubernetes workloads. With a working exploit already in the wild, organizations should act quickly to detect, mitigate, and reduce risk.
The post CVE-2026-31431: Copy Fail vulnerability enables Linux root privilege escalation across cloud environments appeared first on Microsoft Security Blog .
May 2, 2026·Microsoft Security Blog
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-31431
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-31431
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
git.kernel.org
https://git.kernel.org/stable/c/893d22e0135fa394db81df88697fba6032747667
git.kernel.org
https://git.kernel.org/stable/c/19d43105a97be0810edbda875f2cd03f30dc130c
git.kernel.org
https://git.kernel.org/stable/c/961cfa271a918ad4ae452420e7c303149002875b
git.kernel.org
https://git.kernel.org/stable/c/3115af9644c342b356f3f07a4dd1c8905cd9a6fc
git.kernel.org
https://git.kernel.org/stable/c/8b88d99341f139e23bdeb1027a2a3ae10d341d82
git.kernel.org
https://git.kernel.org/stable/c/fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8
More from Kernel
9.8
CVE-2025-39682
tls: fix handling of zero-length records on the rx_list
8.8
CVE-2026-53266
netfilter: bridge: make ebt_snat ARP rewrite writable
8.8
CVE-2013-6282
Linux Kernel Improper Input Validation Vulnerability
8.4
CVE-2022-0185
Linux Kernel Heap-Based Buffer Overflow Vulnerability
8.4
CVE-2013-2094
Linux Kernel Privilege Escalation Vulnerability
