CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 10.0 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from e4f67addf158f98f8197e08974966b18480dc751 before 32a9590a8d30426e3db63e6b20893e47e02576c0; from e4f67addf158f98f8197e08974966b18480dc751 before d0993fc053f29e15cc7c9fe2029df3882a2ab5ab; from e4f67addf158f98f8197e08974966b18480dc751 before 87210054bad82bbae6f483a742dc45722fb47a6b; from e4f67addf158f98f8197e08974966b18480dc751 before d08e8ac13f2e228cc7fc3c70b5ebe71557b624a0; from e4f67addf158f98f8197e08974966b18480dc751 before ec341bb76d77b4c2948764375ee6bfeef4bb41c3; from e4f67addf158f98f8197e08974966b18480dc751 before ff89415d34c3ab9f5312316423122e664ed3524f; from e4f67addf158f98f8197e08974966b18480dc751 before 05f2987f73daa05333fd713d05546142f9f7c5f0; from e4f67addf158f98f8197e08974966b18480dc751 before 8eca411347e1d38964f9ed2c8d3b6ab0e7e4473d | CNA record |
References
- https://git.kernel.org/stable/c/32a9590a8d30426e3db63e6b20893e47e02576c0
- https://git.kernel.org/stable/c/d0993fc053f29e15cc7c9fe2029df3882a2ab5ab
- https://git.kernel.org/stable/c/87210054bad82bbae6f483a742dc45722fb47a6b
- https://git.kernel.org/stable/c/d08e8ac13f2e228cc7fc3c70b5ebe71557b624a0
- https://git.kernel.org/stable/c/ec341bb76d77b4c2948764375ee6bfeef4bb41c3
- https://git.kernel.org/stable/c/ff89415d34c3ab9f5312316423122e664ed3524f
- https://git.kernel.org/stable/c/05f2987f73daa05333fd713d05546142f9f7c5f0
- https://git.kernel.org/stable/c/8eca411347e1d38964f9ed2c8d3b6ab0e7e4473d
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.