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CVE-2026-31471xfrm: iptfs: only publish mode_data after clone setup

Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: iptfs: only publish mode_data after clone setup iptfs_clone_state() stores x->mode_data before allocating the reorder window. If that allocation fails, the code frees the cloned state and returns -ENOMEM, leaving x->mode_data pointing at freed memory. The xfrm clone unwind later runs destroy_state() through x->mode_data, so the failed clone path tears down IPTFS state that clone_state() already freed. Keep the cloned IPTFS state private until all allocations succeed so failed clones leave x->mode_data unset. The destroy path already handles a NULL mode_data pointer.

Timeline

  1. ID reserved

    By Linux

  2. · 44 days later

    Published

  3. · 4 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-31471, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Analyzed3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.13% · top 98% of all CVEs (14 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Affected products

  • Linux · Linux

    • affected 6be02e3e4f376fea468846c8562655ca5ee18204 – < 371a43c4ac70cac0de9f9b1fc5b1660b9565b9f1
    • affected 6be02e3e4f376fea468846c8562655ca5ee18204 – < 5784a1e2889c9525a8f036cb586930e232170bf7
    • affected 6be02e3e4f376fea468846c8562655ca5ee18204 – < d849a2f7309fc0616e79d13b008b0a47e0458b6e

  • Linux · Linux

    • affected 6.14
    • unaffected < 6.14
    • unaffected 6.18.21 – ≤ 6.18.*
    • unaffected 6.19.11 – ≤ 6.19.*
    • unaffected 7.0 – ≤ *

References

References3

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .