CVE-2026-74475 (GCVE-0-2026-74475)
Vulnerability from cvelistv5
Published
2026-08-15 12:27
Modified
2026-10-16 19:05
Severity ?
10.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: e4f67addf158f98f8197e08974966b18480dc751
Version: e4f67addf158f98f8197e08974966b18480dc751
Version: e4f67addf158f98f8197e08974966b18480dc751
Version: e4f67addf158f98f8197e08974966b18480dc751
Version: e4f67addf158f98f8197e08974966b18480dc751
Version: e4f67addf158f98f8197e08974966b18480dc751
Version: e4f67addf158f98f8197e08974966b18480dc751
Version: e4f67addf158f98f8197e08974966b18480dc751
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}


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