In the Linux kernel, the following vulnerability has been resolved:

vxlan: use neigh_ha_snapshot() in route_shortcircuit()

The neighbour hardware address n->ha can be updated asynchronously by the
neighbour subsystem, protected by n->ha_lock seqlock. Reading n->ha without
holding the seqlock loop can lead to torn reads or reading a partially updated
MAC address.

Use neigh_ha_snapshot() in route_shortcircuit() to safely copy n->ha under
read_seqbegin()/read_seqretry() lock protection before using it.

Note that arp_reduce() and neigh_reduce() seem to have the same issue
left for future patches.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
e4f67addf158f98f8197e08974966b18480dc751 affected < d08e8ac13f2e228cc7fc3c70b5ebe71557b624a0
e4f67addf158f98f8197e08974966b18480dc751 affected < ec341bb76d77b4c2948764375ee6bfeef4bb41c3
e4f67addf158f98f8197e08974966b18480dc751 affected < ff89415d34c3ab9f5312316423122e664ed3524f
e4f67addf158f98f8197e08974966b18480dc751 affected < 05f2987f73daa05333fd713d05546142f9f7c5f0
e4f67addf158f98f8197e08974966b18480dc751 affected < 8eca411347e1d38964f9ed2c8d3b6ab0e7e4473d
Linux Linux affected
Version Status Constraints
3.8 affected —
0 unaffected < 3.8
6.6.151 unaffected ≤ 6.6.*
6.12.103 unaffected ≤ 6.12.*
6.18.44 unaffected ≤ 6.18.*
7.1.8 unaffected ≤ 7.1.*
7.2-rc6 unaffected ≤ *

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Fixes

Solution

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Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/05f2987f73daa05333fd713d05546142f9f7c5f0 cve-icon cve-icon
https://git.kernel.org/stable/c/8eca411347e1d38964f9ed2c8d3b6ab0e7e4473d cve-icon cve-icon
https://git.kernel.org/stable/c/d08e8ac13f2e228cc7fc3c70b5ebe71557b624a0 cve-icon cve-icon
https://git.kernel.org/stable/c/ec341bb76d77b4c2948764375ee6bfeef4bb41c3 cve-icon cve-icon
https://git.kernel.org/stable/c/ff89415d34c3ab9f5312316423122e664ed3524f cve-icon cve-icon
History

Sat, 15 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-362
CWE-823

Sat, 15 Aug 2026 12:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: vxlan: use neigh_ha_snapshot() in route_shortcircuit() The neighbour hardware address n->ha can be updated asynchronously by the neighbour subsystem, protected by n->ha_lock seqlock. Reading n->ha without holding the seqlock loop can lead to torn reads or reading a partially updated MAC address. Use neigh_ha_snapshot() in route_shortcircuit() to safely copy n->ha under read_seqbegin()/read_seqretry() lock protection before using it. Note that arp_reduce() and neigh_reduce() seem to have the same issue left for future patches.
Title vxlan: use neigh_ha_snapshot() in route_shortcircuit()
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-15T12:27:10.685Z

Reserved: 2026-08-15T05:44:03.903Z

Link: CVE-2026-74475

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-15T13:17:52.293

Modified: 2026-08-15T13:17:52.293

Link: CVE-2026-74475

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-15T14:15:03Z

Weaknesses