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

Received
AliasesUBUNTU-CVE-2026-74475DEBIAN-CVE-2026-74475
Published 15-08-2026Last modified 16-10-2026

Vulnerability summary

CVE-2026-74475 is a critical (CVSS 10.0) vulnerability in linux. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 39.5% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 10 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 05-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
10.0/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.45%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 22 · Related 19
OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23881-1SUSE-SU-2026:23887-1SUSE-SU-2026:23897-1SUSE-SU-2026:23902-1SUSE-SU-2026:24181-1

Timeline

  1. 15-08-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.45%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.45% on 06-10-2026

06-10-202605-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu169 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 7.0.0-42.42
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 7.0.0-1016.17
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.105-1 | < 7.1.8-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ e4f67addf158f98f8197e08974966b18480dc751, < 32a9590a8d30426e3db63e6b20893e47e02576c0 | ≥ e4f67addf158f98f8197e08974966b18480dc751, < d0993fc053f29e15cc7c9fe2029df3882a2ab5ab | ≥ e4f67addf158f98f8197e08974966b18480dc751, < 87210054bad82bbae6f483a742dc45722fb47a6b | ≥ e4f67addf158f98f8197e08974966b18480dc751, < d08e8ac13f2e228cc7fc3c70b5ebe71557b624a0 | ≥ e4f67addf158f98f8197e08974966b18480dc751, < ec341bb76d77b4c2948764375ee6bfeef4bb41c3 | ≥ e4f67addf158f98f8197e08974966b18480dc751, < ff89415d34c3ab9f5312316423122e664ed3524f | ≥ e4f67addf158f98f8197e08974966b18480dc751, < 05f2987f73daa05333fd713d05546142f9f7c5f0 | ≥ e4f67addf158f98f8197e08974966b18480dc751, < 8eca411347e1d38964f9ed2c8d3b6ab0e7e4473d | 3.8

3 vendors · 172 products

References

22 links
Show all 22 references