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CVE-2025-40236virtio-net: zero unused hash fields

Description

In the Linux kernel, the following vulnerability has been resolved: virtio-net: zero unused hash fields When GSO tunnel is negotiated virtio_net_hdr_tnl_from_skb() tries to initialize the tunnel metadata but forget to zero unused rxhash fields. This may leak information to another side. Fixing this by zeroing the unused hash fields.

Timeline

  1. ID reserved

    By Linux

  2. · 8 months later

    Published

  3. · 5 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

No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Deferred.

EPSS (exploitation in 30 days)
0.20% · top 90% of all CVEs (13 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.

Affected products

  • Linux · Linux

    • affected a2fb4bc4e2a6a031683910d85b278c1d25ae5420 – < b625d231c66a6041e98817ffc944bf6e4c45b2e3
    • affected a2fb4bc4e2a6a031683910d85b278c1d25ae5420 – < b2284768c6b32aa224ca7d0ef0741beb434f03aa

  • Linux · Linux

    • affected 6.17
    • unaffected < 6.17
    • unaffected 6.17.6 – ≤ 6.17.*
    • unaffected 6.18 – ≤ *

References

References2

Sources

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

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Record last updated .