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CVE-2026-74475— vxlan: use neigh_ha_snapshot() in route_shortcircuit()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 3.8版本存在安全漏洞，该漏洞源于在route_shortcircuit()函数中读取邻居硬件地址n->ha时未持有seqlock锁，可能导致撕裂读取或读取到部分更新的MAC地址。

CVSS 10.0 · Critical EPSS 0.45% · P38

Possible ATT&CK Techniques 1 AI

T1201 · Password Policy Discovery

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux e4f67addf158f98f8197e08974966b18480dc751< 32a9590a8d30426e3db63e6b20893e47e02576c0 affected
e4f67addf158f98f8197e08974966b18480dc751< d0993fc053f29e15cc7c9fe2029df3882a2ab5ab affected
e4f67addf158f98f8197e08974966b18480dc751< 87210054bad82bbae6f483a742dc45722fb47a6b affected
e4f67addf158f98f8197e08974966b18480dc751< d08e8ac13f2e228cc7fc3c70b5ebe71557b624a0 affected
e4f67addf158f98f8197e08974966b18480dc751< ec341bb76d77b4c2948764375ee6bfeef4bb41c3 affected
e4f67addf158f98f8197e08974966b18480dc751< ff89415d34c3ab9f5312316423122e664ed3524f affected
e4f67addf158f98f8197e08974966b18480dc751< 05f2987f73daa05333fd713d05546142f9f7c5f0 affected
e4f67addf158f98f8197e08974966b18480dc751< 8eca411347e1d38964f9ed2c8d3b6ab0e7e4473d affected
… +10 more rows
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I. Basic Information for CVE-2026-74475

Vulnerability Information
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Vulnerability Title
vxlan: use neigh_ha_snapshot() in route_shortcircuit()
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 3.8版本存在安全漏洞，该漏洞源于在route_shortcircuit()函数中读取邻居硬件地址n->ha时未持有seqlock锁，可能导致撕裂读取或读取到部分更新的MAC地址。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux e4f67addf158f98f8197e08974966b18480dc751 ~ 32a9590a8d30426e3db63e6b20893e47e02576c0 -
Linux Linux 3.8 -

II. Public POCs for CVE-2026-74475

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III. Intelligence Information for CVE-2026-74475

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Patches & Fixes for CVE-2026-74475 (7)

Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total

CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-74427 9.8 CRITICAL afs: Fix netns teardown to cancel the preallocation charger
CVE-2026-72211 9.8 CRITICAL ntfs: grow index root value before reparent header update
CVE-2026-72209 9.8 CRITICAL ntfs: validate attribute values on lookup
CVE-2026-72208 9.8 CRITICAL ntfs: add bounds check before accessing EA entries
CVE-2026-72299 9.8 CRITICAL tipc: restrict socket queue dumps in enqueue tracepoints
CVE-2026-74434 9.8 CRITICAL rxrpc: Don't move a peeked OOB message onto the pending queue
CVE-2026-74433 9.8 CRITICAL rxrpc: Fix UAF in rxgk_issue_challenge()
CVE-2026-72473 9.8 CRITICAL xprtrdma: Decouple req recycling from RPC completion
CVE-2026-72472 9.8 CRITICAL nfs: use nfsi->rwsem to protect traversal of the file lock list
CVE-2026-74545 9.8 CRITICAL rtase: fix double free of multi-frag skb on DMA map failure
CVE-2026-72046 9.8 CRITICAL gve: fix header buffer corruption with header-split and HW-GRO
CVE-2026-72466 9.8 CRITICAL xprtrdma: Fix bcall rep leak and unbounded peek
CVE-2026-72201 9.8 CRITICAL ntfs: validate index entries on reading

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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