CVE-2026-31431
HIGHCVSS 7.8/10Actively ExploitedEPSS 94.55%
Last modified
CVE-2026-31431 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 94.55% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linux | Linux Kernel | >= 4.14, < 5.10.254 | — |
| Linux | Linux Kernel | >= 5.11, < 5.15.204 | — |
| Linux | Linux Kernel | >= 5.16, < 6.1.170 | — |
| Linux | Linux Kernel | >= 6.2, < 6.6.137 | — |
| Linux | Linux Kernel | >= 6.7, < 6.12.85 | — |
| Linux | Linux Kernel | >= 6.13, < 6.18.22 | — |
| Linux | Linux Kernel | >= 6.19, < 6.19.12 | — |
| Linux | Linux Kernel | 7.0 | Rc1 |
| Redhat | Openshift Container Platform | >= 4.12, < 4.12.89 | — |
| Redhat | Openshift Container Platform | >= 4.13, < 4.13.66 | — |
| Redhat | Openshift Container Platform | >= 4.14, < 4.14.65 | — |
| Redhat | Openshift Container Platform | >= 4.15, < 4.15.64 | — |
| Redhat | Openshift Container Platform | >= 4.16, < 4.16.61 | — |
| Redhat | Openshift Container Platform | >= 4.17, < 4.17.53 | — |
| Redhat | Openshift Container Platform | >= 4.18, < 4.18.40 | — |
| Redhat | Openshift Container Platform | >= 4.19, < 4.19.30 | — |
| Redhat | Openshift Container Platform | >= 4.20, < 4.20.21 | — |
| Redhat | Openshift Container Platform | >= 4.21, < 4.21.14 | — |
| Redhat | Openshift Container Platform | 4.0 | — |
| Redhat | Enterprise Linux | 8.0 | — |
| Redhat | Enterprise Linux | 9.0 | — |
| Redhat | Enterprise Linux | 10.0 | — |
| Redhat | Enterprise Linux Aus | 8.4 | — |
| Redhat | Enterprise Linux Aus | 8.6 | — |
| Redhat | Enterprise Linux Eus | 8.4 | — |
| Redhat | Enterprise Linux Eus | 9.4 | — |
| Redhat | Enterprise Linux Eus | 9.6 | — |
| Redhat | Enterprise Linux Eus | 10.0 | — |
| Redhat | Enterprise Linux Tus | 8.6 | — |
| Redhat | Enterprise Linux Tus | 8.8 | — |
| Redhat | Enterprise Linux Update Services For Sap Solutions | 8.6 | — |
| Redhat | Enterprise Linux Update Services For Sap Solutions | 8.8 | — |
| Redhat | Enterprise Linux Update Services For Sap Solutions | 9.0 | — |
| Redhat | Enterprise Linux Update Services For Sap Solutions | 9.2 | — |
| Amazon | Amazon Linux | All versions | — |
| Canonical | Ubuntu Linux | All versions | — |
| Debian | Debian Linux | 11.0 | — |
| Debian | Debian Linux | 12.0 | — |
| Debian | Debian Linux | 13.0 | — |
| Opensuse | Leap | 15.3 | — |
| Opensuse | Leap | 15.4 | — |
| Opensuse | Leap | 15.5 | — |
| Opensuse | Leap | 15.6 | — |
| Suse | Caas Platform | 4.0 | — |
| Suse | Enterprise Storage | 6.0 | — |
| Suse | Enterprise Storage | 7.0 | — |
| Suse | Enterprise Storage | 7.1 | — |
| Suse | Manager Proxy | 4.0 | — |
| Suse | Manager Proxy | 4.1 | — |
| Suse | Manager Proxy | 4.2 | — |
Showing 50 of 109 affected configurations. See NVD for the full list.
References
- http://www.openwall.com/lists/oss-security/2026/04/29/23Exploit, Mailing List, Patch
- http://www.openwall.com/lists/oss-security/2026/04/29/25Mailing List, Patch
- http://www.openwall.com/lists/oss-security/2026/04/29/26Exploit, Mailing List, Patch
- http://www.openwall.com/lists/oss-security/2026/04/30/10Mailing List, Patch
- http://www.openwall.com/lists/oss-security/2026/04/30/11Mailing List, Patch
- http://www.openwall.com/lists/oss-security/2026/04/30/12Mailing List, Patch
- http://www.openwall.com/lists/oss-security/2026/04/30/14Mailing List, Patch
- http://www.openwall.com/lists/oss-security/2026/04/30/15Mailing List, Patch
- http://www.openwall.com/lists/oss-security/2026/04/30/16Mailing List, Patch
- http://www.openwall.com/lists/oss-security/2026/04/30/18Exploit, Mailing List
- http://www.openwall.com/lists/oss-security/2026/04/30/5Exploit, Mailing List, Patch
- https://copy.failExploit
- https://websec.net/blog/cve-2026-31431-linux-algifaead-page-cache-write-to-root-69f38a4ccddd2db1f520f170Exploit, Third Party Advisory
- https://www.kb.cert.org/vuls/id/260001Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:13565Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:13566Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:13577Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:13578Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:13681Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:13690Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:13727Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:13729Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:13734Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:13811Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:13862Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:13885Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:13887Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:13932Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:13936Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:14097Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:14112Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:14137Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:14165Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:14230Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:14301Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:14339Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:14773Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:14926Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:15087Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:15976Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:15978Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:16018Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:16063Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:16111Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:16208Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:16209Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:16210Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:19074Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:19225Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:33486Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2026-31431Third Party Advisory
- https://access.redhat.com/security/cve/cve-2026-31431#cve-details-mitigationThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2460538Issue Tracking, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-019113.htmlThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-265688.htmlThird Party Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31431.jsonThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-31431US Government Resource
- https://xint.io/blog/copy-fail-linux-distributions#the-fix-6Exploit, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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 score of 7.8/10 (HIGH severity). The EPSS model estimates a 94.55% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2026-31431?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2026-31431?
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Scan your code nowSource: NVD / NIST