Strix
57.7K

CVE-2026-74475

CRITICALCVSS 10/10EPSS 0.40%

Last modified

CVE-2026-74475 is a critical-severity vulnerability rated 10/10 on the CVSS scale. 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.. EPSS estimates a 0.40% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
10/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L

EPSS Probability
0.40%

33.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= e4f67addf158f98f8197e08974966b18480dc751, < 32a9590a8d30426e3db63e6b20893e47e02576c0; >= e4f67addf158f98f8197e08974966b18480dc751, < d0993fc053f29e15cc7c9fe2029df3882a2ab5ab; >= e4f67addf158f98f8197e08974966b18480dc751, < 87210054bad82bbae6f483a742dc45722fb47a6b; >= e4f67addf158f98f8197e08974966b18480dc751, < d08e8ac13f2e228cc7fc3c70b5ebe71557b624a0; >= e4f67addf158f98f8197e08974966b18480dc751, < ec341bb76d77b4c2948764375ee6bfeef4bb41c3; >= e4f67addf158f98f8197e08974966b18480dc751, < ff89415d34c3ab9f5312316423122e664ed3524f; >= e4f67addf158f98f8197e08974966b18480dc751, < 05f2987f73daa05333fd713d05546142f9f7c5f0; >= e4f67addf158f98f8197e08974966b18480dc751, < 8eca411347e1d38964f9ed2c8d3b6ab0e7e4473d
LinuxLinux3.8

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74475?
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.
How severe is CVE-2026-74475?
CVE-2026-74475 has a CVSS score of 10/10 (CRITICAL severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.
How do I fix CVE-2026-74475?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →

Are you affected by CVE-2026-74475?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST