CVE-2026-31431

HIGHPre-NVD 7.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-05-01), indicating real-world exploitation has been confirmed by US federal agencies. a secondary CVSS source baseline 7.8 retained for reference (NVD's own analysis pending). Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, secondary
Exploited in the wild
7.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 96%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

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 v3
7.8
EG Score
9.0(high)
EPSS
99.9%
KEV
⚠ Exploited

Published

April 22, 2026

Last Modified

July 1, 2026

Advisory Details (4)

Auto-updated Apr 29, 2026
No patch confirmed yet.
generic

GitHub - theori-io/copy-fail-CVE-2026-31431 · GitHub

https://github.com/theori-io/copy-fail-CVE-2026-31431
generic

crypto: algif_aead - Revert to operating out-of-place - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8
generic

crypto: algif_aead - Revert to operating out-of-place - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ce42ee423e58dffa5ec03524054c9d8bfd4f6237
generic

crypto: algif_aead - Revert to operating out-of-place - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5

Vendor Advisories for CVE-2026-31431(20)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(13)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 121× in last 7d / 553× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 747 total refreshes for this CVE.

  1. 2026-07-07 06:18 UTCEG score recompute
  2. 2026-07-07 06:18 UTCVendor advisory
  3. 2026-07-07 06:18 UTCGHSA enrichment
  4. 2026-07-07 02:10 UTCEG score recompute
  5. 2026-07-07 02:10 UTCVendor advisory
  6. 2026-07-07 02:09 UTCGHSA enrichment
  7. 2026-07-06 22:00 UTCEG score recompute
  8. 2026-07-06 22:00 UTCVendor advisory
  9. 2026-07-06 22:00 UTCGHSA enrichment
  10. 2026-07-06 17:53 UTCEG score recompute
  11. 2026-07-06 17:53 UTCVendor advisory
  12. 2026-07-06 17:52 UTCGHSA enrichment
  13. 2026-07-06 13:44 UTCEG score recompute
  14. 2026-07-06 13:44 UTCVendor advisory
  15. 2026-07-06 13:44 UTCGHSA enrichment
  16. 2026-07-06 09:37 UTCEG score recompute
  17. 2026-07-06 09:37 UTCVendor advisory
  18. 2026-07-06 09:36 UTCGHSA enrichment
  19. 2026-07-06 05:28 UTCEG score recompute
  20. 2026-07-06 05:28 UTCVendor advisory
  21. 2026-07-06 05:28 UTCGHSA enrichment
  22. 2026-07-06 01:20 UTCEG score recompute
  23. 2026-07-06 01:20 UTCVendor advisory
  24. 2026-07-06 01:20 UTCGHSA enrichment
  25. 2026-07-05 21:12 UTCEG score recompute
Show 75 more
  1. 2026-07-05 21:12 UTCVendor advisory
  2. 2026-07-05 21:12 UTCGHSA enrichment
  3. 2026-07-05 17:04 UTCEG score recompute
  4. 2026-07-05 17:04 UTCVendor advisory
  5. 2026-07-05 17:03 UTCGHSA enrichment
  6. 2026-07-05 12:56 UTCEG score recompute
  7. 2026-07-05 12:56 UTCVendor advisory
  8. 2026-07-05 12:55 UTCGHSA enrichment
  9. 2026-07-05 08:48 UTCEG score recompute
  10. 2026-07-05 08:48 UTCVendor advisory
  11. 2026-07-05 08:48 UTCGHSA enrichment
  12. 2026-07-05 04:40 UTCEG score recompute
  13. 2026-07-05 04:40 UTCVendor advisory
  14. 2026-07-05 04:39 UTCGHSA enrichment
  15. 2026-07-05 00:31 UTCEG score recompute
  16. 2026-07-05 00:31 UTCVendor advisory
  17. 2026-07-05 00:30 UTCGHSA enrichment
  18. 2026-07-04 20:23 UTCEG score recompute
  19. 2026-07-04 20:23 UTCVendor advisory
  20. 2026-07-04 20:22 UTCGHSA enrichment
  21. 2026-07-04 16:15 UTCEG score recompute
  22. 2026-07-04 16:15 UTCVendor advisory
  23. 2026-07-04 16:14 UTCGHSA enrichment
  24. 2026-07-04 12:07 UTCEG score recompute
  25. 2026-07-04 12:07 UTCVendor advisory
  26. 2026-07-04 12:06 UTCGHSA enrichment
  27. 2026-07-04 07:58 UTCEG score recompute
  28. 2026-07-04 07:58 UTCVendor advisory
  29. 2026-07-04 07:57 UTCGHSA enrichment
  30. 2026-07-04 03:50 UTCEG score recompute
  31. 2026-07-04 03:50 UTCVendor advisory
  32. 2026-07-04 03:49 UTCGHSA enrichment
  33. 2026-07-03 23:41 UTCEG score recompute
  34. 2026-07-03 23:41 UTCVendor advisory
  35. 2026-07-03 23:40 UTCGHSA enrichment
  36. 2026-07-03 19:33 UTCEG score recompute
  37. 2026-07-03 19:33 UTCVendor advisory
  38. 2026-07-03 19:32 UTCGHSA enrichment
  39. 2026-07-03 15:24 UTCEG score recompute
  40. 2026-07-03 15:24 UTCVendor advisory
  41. 2026-07-03 15:24 UTCGHSA enrichment
  42. 2026-07-03 11:16 UTCEG score recompute
  43. 2026-07-03 11:16 UTCVendor advisory
  44. 2026-07-03 11:16 UTCGHSA enrichment
  45. 2026-07-03 07:08 UTCEG score recompute
  46. 2026-07-03 07:08 UTCVendor advisory
  47. 2026-07-03 07:08 UTCGHSA enrichment
  48. 2026-07-03 03:00 UTCEG score recompute
  49. 2026-07-03 03:00 UTCVendor advisory
  50. 2026-07-03 02:59 UTCGHSA enrichment
  51. 2026-07-02 22:52 UTCEG score recompute
  52. 2026-07-02 22:52 UTCVendor advisory
  53. 2026-07-02 22:51 UTCGHSA enrichment
  54. 2026-07-02 18:44 UTCEG score recompute
  55. 2026-07-02 18:44 UTCVendor advisory
  56. 2026-07-02 18:43 UTCGHSA enrichment
  57. 2026-07-02 14:36 UTCEG score recompute
  58. 2026-07-02 14:36 UTCVendor advisory
  59. 2026-07-02 14:35 UTCGHSA enrichment
  60. 2026-07-02 10:28 UTCEG score recompute
  61. 2026-07-02 10:28 UTCVendor advisory
  62. 2026-07-02 10:27 UTCGHSA enrichment
  63. 2026-07-02 06:19 UTCEG score recompute
  64. 2026-07-02 06:19 UTCVendor advisory
  65. 2026-07-02 06:19 UTCGHSA enrichment
  66. 2026-07-02 02:11 UTCEG score recompute
  67. 2026-07-02 02:11 UTCVendor advisory
  68. 2026-07-02 02:11 UTCGHSA enrichment
  69. 2026-07-01 22:04 UTCEG score recompute
  70. 2026-07-01 22:04 UTCVendor advisory
  71. 2026-07-01 22:03 UTCGHSA enrichment
  72. 2026-07-01 19:16 UTCCISA KEV update
  73. 2026-07-01 17:55 UTCEG score recompute
  74. 2026-07-01 17:55 UTCVendor advisory
  75. 2026-07-01 17:55 UTCGHSA enrichment

Publicly available exploits

(10 references)

Working exploit code is in the public domain (10 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCsgkdev/ptrace_may_dream
    First seen May 20, 2026

    CVE-2026-31431-killed page-cache exploit — code exec into containers sharing the same image layer

    Open source ↗
  • GitHub PoC4xura/CVE-2026-31431-Copy-Fail
    First seen May 18, 2026

    Research artifacts, PoC scripts, and lab assets for the Copy Fail Linux local privilege escalation writeup on https://4xura.com/binex/kernel/copy-fail

    Open source ↗
  • GitHub PoCKoshmare-Blossom/Copyfail-sh
    First seen May 13, 2026

    A Bash implementation of copyfail (CVE-2026-31431)

    Open source ↗
  • GitHub PoChaydenjames/CVE-2026-31431-check
    First seen May 9, 2026

    Read-only checker for CVE-2026-31431 (algif_aead local root). Reports kernel/module state and suggests mitigations.

    Open source ↗
  • GitHub PoCkrisiasty/vcheck
    First seen May 8, 2026

    Vulnerability detection and mitigation tool for Copy Fail and Dirty Frag bugs (CVE-2026-31431, CVE-2026-43284, CVE-2026-43500)

    Open source ↗
  • GitHub PoCinfiniroot/ansible-mitigate-copyfail-dirtyfrag
    First seen May 8, 2026

    Simple Ansible Playbook to mitigate against CopyFail (CVE-2026-31431) and DirtyFrag (CVE-2026-43284) vulnerabilities.

    Open source ↗
  • GitHub PoCKaraZajac/DIRTYFAIL
    First seen May 8, 2026

    Detector + PoC for Linux page-cache write vulnerabilities: Copy Fail (CVE-2026-31431) and Dirty Frag (CVE-2026-43284/43500). Authorized security research only.

    Open source ↗
  • GitHub PoCphilfry/cve-2026-31431-ftrace
    First seen May 6, 2026

    mitigation of cve-2026-31431 using ftrace

    Open source ↗
  • GitHub PoCsgkdev/page_inject
    First seen May 6, 2026

    CVE-2026-31431-killed page-cache exploit — code exec into containers sharing the same image layer

    Open source ↗
  • GitHub PoCDullpurple-sloop726/CVE-2026-31431-Linux-Copy-Fail
    First seen May 6, 2026

    Exploit CVE-2026-31431 on Linux using a Rust implementation to achieve local privilege escalation via an arbitrary page cache write primitive.

    Open source ↗

Frequently asked(6)

What is CVE-2026-31431?
CVE-2026-31431 is a high vulnerability published on April 22, 2026. 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…
When was CVE-2026-31431 disclosed?
CVE-2026-31431 was first published in the National Vulnerability Database on April 22, 2026, with the most recent update on July 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31431 actively exploited?
Yes. CISA added CVE-2026-31431 to the Known Exploited Vulnerabilities catalog on May 1, 2026, affecting Linux Kernel. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2026-31431?
CVE-2026-31431 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2026-31431?
CVE-2026-31431 affects Linux Kernel. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2026-31431?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31431, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-31431

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