CVE-2026-31471

Local kernel memory corruption via premature mode_data publication

Published Apr 22, 2026 · Updated Apr 22, 2026

Double free in Linux Kernel 6.14 through 6.18.20, 6.19 through 6.19.10, and 7.0 RCs allows local users to corrupt memory during IPTFS cloning. iptfs_clone_state() publishes x->mode_data before reorder-window allocation completes, then frees the clone on allocation failure while clone unwind frees it again. Reaching the flaw requires low-privileged local access and a failed reorder-window allocation; the public record establishes no reliable privilege-gain or code-execution outcome.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double free in Linux Kernel 6.14 through 6.18.20, 6.19 through 6.19.10, and 7.0 RCs allows local users to corrupt memory during IPTFS cloning. iptfs_clone_state() publishes x->mode_data before reorder-window allocation completes, then frees the clone on allocation failure while clone unwind frees it again. Reaching the flaw requires low-privileged local access and a failed reorder-window allocation; the public record establishes no reliable privilege-gain or code-execution outcome.

The record

CVE
CVE-2026-31471
Published
Apr 22, 2026
Updated
Apr 22, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-415
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.14
  2. Affected versionversion=6be02e3e4f376fea468846c8562655ca5ee18204 <371a43c4ac70cac0de9f9b1fc5b1660b9565b9f1
  3. Affected versionversion=6be02e3e4f376fea468846c8562655ca5ee18204 <5784a1e2889c9525a8f036cb586930e232170bf7
  4. Affected versionversion=6be02e3e4f376fea468846c8562655ca5ee18204 <d849a2f7309fc0616e79d13b008b0a47e0458b6e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.14; version=6be02e3e4f376fea468846c8562655ca5ee18204 <371a43c4ac70cac0de9f9b1fc5b1660b9565b9f1; version=6be02e3e4f376fea468846c8562655ca5ee18204 <5784a1e2889c9525a8f036cb586930e232170bf7; version=6be02e3e4f376fea468846c8562655ca5ee18204 <d849a2f7309fc0616e79d13b008b0a47e0458b6e

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-415Double Free

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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