by Kastro CVE-2026-74475
Linux Linux — vxlan: use neigh_ha_snapshot() in route_shortcircuit()
Description · from the CVE record
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.
Affected
ProductAffectedFixed inSource
Linuxe4f67addf158f98f8197e08974966b18480dc751 – < 32a9590a8d30426e3db63e6b20893e47e02576c032a9590a8d30426e3db63e6b20893e47e02576c0CNA
Linuxe4f67addf158f98f8197e08974966b18480dc751 – < d0993fc053f29e15cc7c9fe2029df3882a2ab5abd0993fc053f29e15cc7c9fe2029df3882a2ab5abCNA
Linuxe4f67addf158f98f8197e08974966b18480dc751 – < 87210054bad82bbae6f483a742dc45722fb47a6b87210054bad82bbae6f483a742dc45722fb47a6bCNA
Linuxe4f67addf158f98f8197e08974966b18480dc751 – < d08e8ac13f2e228cc7fc3c70b5ebe71557b624a0d08e8ac13f2e228cc7fc3c70b5ebe71557b624a0CNA
Linuxe4f67addf158f98f8197e08974966b18480dc751 – < ec341bb76d77b4c2948764375ee6bfeef4bb41c3ec341bb76d77b4c2948764375ee6bfeef4bb41c3CNA
Linuxe4f67addf158f98f8197e08974966b18480dc751 – < ff89415d34c3ab9f5312316423122e664ed3524fff89415d34c3ab9f5312316423122e664ed3524fCNA
Linuxe4f67addf158f98f8197e08974966b18480dc751 – < 05f2987f73daa05333fd713d05546142f9f7c5f005f2987f73daa05333fd713d05546142f9f7c5f0CNA
Linuxe4f67addf158f98f8197e08974966b18480dc751 – < 8eca411347e1d38964f9ed2c8d3b6ab0e7e4473d8eca411347e1d38964f9ed2c8d3b6ab0e7e4473dCNA
Linux3.8–CNA
Scores by source
Linux (CNA)10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total