CVE-2025-40236

Published: Dec 4, 2025

Modified: May 11, 2026

PUBLISHED

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.

Vendor	Product	Versions
Linux	Linux	affected `a2fb4bc4e2a6a031683910d85b278c1d25ae5420 - < b625d231c66a6041e98817ffc944bf6e4c45b2e3` affected `a2fb4bc4e2a6a031683910d85b278c1d25ae5420 - < b2284768c6b32aa224ca7d0ef0741beb434f03aa`
Linux	Linux	affected `6.17` unaffected `0 - < 6.17` unaffected `6.17.6 - <= 6.17.` unaffected `6.18 - <= `

References

https://git.kernel.org/stable/c/b625d231c66a6041e98817ffc944bf6e4c45b2e3

https://git.kernel.org/stable/c/b2284768c6b32aa224ca7d0ef0741beb434f03aa

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CVE-2025-40236

Description

Affected Products

References