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CVE-2025-40236

virtio-net: zero unused hash fields

N/A
Published: December 4, 2025 at 03:31 PM UTC
Updated: October 19, 2026 at 09:10 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
N/A
Exploit prediction
EPSS 0.2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
6.17a2fb4bc4e2a6a031683910d85b278c1d25ae5420
Vendor states this is fixed in b2284768c6b32aa224ca7d0ef0741beb434f03aa (fixed)
Vendor states this is fixed in b625d231c66a6041e98817ffc944bf6e4c45b2e3 (fixed)
Vendor states this is fixed in 6.17 (unaffected)
Vendor states this is fixed in 6.17.6 (unaffected)
Vendor states this is fixed in 6.18 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: cverecord
https://git.kernel.org/stable/c/b625d231c66a6041e98817ffc944bf6e4c45b2e3
Source: cverecord
https://git.kernel.org/stable/c/b2284768c6b32aa224ca7d0ef0741beb434f03aa

Quick Info

StatusDEFERRED

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