CVE-2026-31431: Linux Kernel Incorrect Resource Transfer Between Spheres Vulnerability

Reference page built from the source records below, each shown as its source publishes it. Dataset version ref-6018041554a4, updated 2026-11-02T23:39:54.475Z.

CISA Known Exploited Vulnerabilities

Name
Linux Kernel Incorrect Resource Transfer Between Spheres Vulnerability
Vendor
Linux
Product
Kernel
Added to the catalog
2026-05-01
Due date for US federal agencies
2026-05-15
Weaknesses
CWE-669
Catalog version
2026.10.30

Linux Kernel contains an incorrect resource transfer between spheres vulnerability that could allow for privilege escalation.

Required action (CISA)

"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.

Links in CISA's notes

Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

NVD analysis

Status
Analyzed
Published
2026-04-22T09:16:21.270
Last modified
2026-09-08T15:13:07.273
Weaknesses
CWE-669, CWE-1288

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.

MetricScoreSeverityVectorScored by
CVSS 3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)

References

This product uses the NVD API but is not endorsed or certified by the NVD.

Read on 2026-11-02T23:42:31.494Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-31431

CVE record

Title (CNA)
crypto: algif_aead - Revert to operating out-of-place
Assigner
Linux
State
PUBLISHED
Published
2026-04-22T08:15:10.123Z
Updated
2026-10-15T01:16:12.771Z

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.

References

Read on 2026-11-03T02:19:36.051Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/31xxx/CVE-2026-31431.json

Detection rules (SigmaHQ)

SigmaHQ rules whose own tags name this CVE. Each rule page shows the rule as its author published it.

Defensive techniques (MITRE D3FEND)

D3FEND maps these defensive techniques to the weakness (CWE) that NVD lists for this CVE, through the digital artifacts the weakness affects. D3FEND does not say they stop this vulnerability.

CWE-669: Incorrect Resource Transfer Between Spheres

D3FEND ontology version 1.6.0.

Read on 2026-11-03T00:02:31.224Z under licence d3fend-terms-of-use@f98cbc7e from https://d3fend.mitre.org/api/weakness/cwe/CWE-669.json

CWE-1288: Improper Validation of Consistency within Input

D3FEND ontology version 1.6.0.

Read on 2026-11-03T00:03:35.295Z under licence d3fend-terms-of-use@f98cbc7e from https://d3fend.mitre.org/api/weakness/cwe/CWE-1288.json

MITRE D3FEND™ knowledge graph. © 2025 The MITRE Corporation.
"The MITRE Corporation (MITRE) hereby grants you a non-exclusive, royalty-free license to use D3FEND for research, development, and commercial purposes. Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." Terms: https://d3fend.mitre.org/tou/

Sources and licences

  • CISA

    Source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30, CC0 1.0. Use of this data does not imply endorsement by CISA or DHS.

    CC0 1.0 Universal

  • National Vulnerability Database (NIST)

    This product uses the NVD API but is not endorsed or certified by the NVD.

    NVD API Terms of Use (NIST publications in the public domain, 17 U.S.C. 105)

  • CVE Program, The MITRE Corporation

    Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation. CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

    CVE Program Terms of Use ("CVE Usage" licence)

  • SigmaHQ

    "Linux AF_ALG Socket Creation - Kernel Crypto API Exploit Indicator" by Gene Kazimiarovich (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2026/Exploits/CVE-2026-31431/lnx_auditd_exploit_cve_2026_31431_af_alg_socket_creation.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

  • SigmaHQ

    "Authencesn Crypto Module Load via Modprobe - Copy-Fail Indicator" by Gene Kazimiarovich (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2026/Exploits/CVE-2026-31431/proc_creation_lnx_exploit_cve_2026_31431_copyfail.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

  • MITRE D3FEND

    MITRE D3FEND™ knowledge graph. © 2025 The MITRE Corporation.
    "The MITRE Corporation (MITRE) hereby grants you a non-exclusive, royalty-free license to use D3FEND for research, development, and commercial purposes. Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." Terms: https://d3fend.mitre.org/tou/

    MITRE D3FEND Terms of Use (site + knowledge graph); source repo MIT

Cite this page

Dragons Eye Ransomware Tracker, "CVE-2026-31431: Linux Kernel Incorrect Resource Transfer Between Spheres Vulnerability",
entity page, dataset version ref-6018041554a4, updated 2026-11-02T23:39:54.475Z,
https://ransomware-tracker.com/cve/CVE-2026-31431 (accessed 2026-11-03).
Underlying source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30.
Underlying source: National Vulnerability Database (NIST), CVE API 2.0, record last modified 2026-09-08T15:13:07.273.
Underlying source: CVE List (CVE Program, The MITRE Corporation), record updated 2026-10-15T01:16:12.771Z.
Underlying source: SigmaHQ rule 474b415a-8b3d-4e6a-9f12-0d5c8a7b6e94, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.
Underlying source: SigmaHQ rule 474b415a-d917-4f3b-8c62-9e1a0d5f7b48, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.
Underlying source: MITRE D3FEND, ontology version 1.6.0.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.

CISA KEV index