CVE-2026-31431

HIGH 7.8

⚠️ CISA KEV

crypto: algif_aead - Revert to operating out-of-place

CVSS Score

7.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	linux
Product	linux
Ecosystems	Linux Kernel
Industries	Technology
Published	Apr 22, 2026
Last Updated	May 18, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Linux / Linux

72548b093ee38a6d4f2a19e6ef1948ae05c181f7 < 893d22e0135fa394db81df88697fba6032747667 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 < 19d43105a97be0810edbda875f2cd03f30dc130c 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 < 961cfa271a918ad4ae452420e7c303149002875b 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 < 3115af9644c342b356f3f07a4dd1c8905cd9a6fc 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 < 8b88d99341f139e23bdeb1027a2a3ae10d341d82 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 < fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 < ce42ee423e58dffa5ec03524054c9d8bfd4f6237 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 < a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5

Linux / Linux

4.14

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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 git.kernel.org: https://git.kernel.org/stable/c/ce42ee423e58dffa5ec03524054c9d8bfd4f6237 git.kernel.org: https://git.kernel.org/stable/c/a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5 github.com: https://github.com/theori-io/copy-fail-CVE-2026-31431 xint.io: https://xint.io/blog/copy-fail-linux-distributions#the-fix-6 lore.kernel.org: https://lore.kernel.org/linux-cve-announce/2026042214-CVE-2026-31431-3d65@gregkh/ access.redhat.com: https://access.redhat.com/security/cve/cve-2026-31431#cve-details-mitigation cisa.gov: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-31431 openwall.com: http://www.openwall.com/lists/oss-security/2026/04/29/23 copy.fail: https://copy.fail openwall.com: http://www.openwall.com/lists/oss-security/2026/04/29/25 openwall.com: http://www.openwall.com/lists/oss-security/2026/04/29/26 openwall.com: http://www.openwall.com/lists/oss-security/2026/04/30/2 openwall.com: http://www.openwall.com/lists/oss-security/2026/04/30/5 openwall.com: http://www.openwall.com/lists/oss-security/2026/04/30/6 openwall.com: http://www.openwall.com/lists/oss-security/2026/04/30/10 openwall.com: http://www.openwall.com/lists/oss-security/2026/04/30/11 openwall.com: http://www.openwall.com/lists/oss-security/2026/04/30/12 openwall.com: http://www.openwall.com/lists/oss-security/2026/04/30/14 openwall.com: http://www.openwall.com/lists/oss-security/2026/04/30/15 openwall.com: http://www.openwall.com/lists/oss-security/2026/04/30/16 openwall.com: http://www.openwall.com/lists/oss-security/2026/04/30/17 openwall.com: http://www.openwall.com/lists/oss-security/2026/04/30/18 websec.net: https://websec.net/blog/cve-2026-31431-linux-algifaead-page-cache-write-to-root-69f38a4ccddd2db1f520f170 openwall.com: http://www.openwall.com/lists/oss-security/2026/04/30/20 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/01/2 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/01/3 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/01/10 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/01/12 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/01/15 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/01/16 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/01/17 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/01/18 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/01/22 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/01/23 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/01/24 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/02/4 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/02/5 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/02/6 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/02/7 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/02/8 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/02/14 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/02/15 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/02/16 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/02/17 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/02/18 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/02/19 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/02/20 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/02/21 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/02/23 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/02/24 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/02/25 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/03/3 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/03/4 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/03/10 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/03/5 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/03/6 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/03/12 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/03/13 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/1 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/2 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/10 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/11 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/12 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/13 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/14 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/8 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/9 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/24 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/27 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/28 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/29 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/31 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/06/5 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/07/2 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/07/12 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/08/13 kb.cert.org: https://www.kb.cert.org/vuls/id/260001 openwall.com: http://www.openwall.com/lists/oss-security/2026/05/18/3 cert-portal.siemens.com: https://cert-portal.siemens.com/productcert/html/ssa-265688.html cert-portal.siemens.com: https://cert-portal.siemens.com/productcert/html/ssa-082556.html