VulnerabilityPublished 17 Sep 2026Updated 30 Oct 2026

CVE-2026-90106: Linux kernel · net: bridge: arp/nd proxy: fix reading neigh ha

Source GCVE Database

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Authoritative record:CVE-2026-90106

Not known to be exploited · fixed in a178bcb01051688fb085ffb72cc4b13b5df0fc0f : update Linux kernel when convenient.

Data as of 30 Oct 2026, 16:33 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Patch: Available – fixed in a178bcb01051688fb085ffb72cc4b13b5df0fc0f, 57549ab9079122991dfa0f8248ca00e101e8e69b, 2365b25b4add42bb5f652920b45bc9ad0e35cbc7 +3

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-gcv9-cqh3-4c3g

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 057658cb33fbf4d4309f01fe8845903b1cd07fad, < a178bcb01051688fb085ffb72cc4b13b5df0fc0f	Fixed in a178bcb01051688fb085ffb72cc4b13b5df0fc0f
LinuxLinux	Affected ≥ 057658cb33fbf4d4309f01fe8845903b1cd07fad, < 57549ab9079122991dfa0f8248ca00e101e8e69b	Fixed in 57549ab9079122991dfa0f8248ca00e101e8e69b
LinuxLinux	Affected ≥ 057658cb33fbf4d4309f01fe8845903b1cd07fad, < 2365b25b4add42bb5f652920b45bc9ad0e35cbc7	Fixed in 2365b25b4add42bb5f652920b45bc9ad0e35cbc7
LinuxLinux	Affected ≥ 057658cb33fbf4d4309f01fe8845903b1cd07fad, < 884cbf15ccd3980bcc9583073045f91798a86d4e	Fixed in 884cbf15ccd3980bcc9583073045f91798a86d4e
LinuxLinux	Affected ≥ 057658cb33fbf4d4309f01fe8845903b1cd07fad, < 490c72868443ff90f47f4ccbaaff1eaf8fed46ab	Fixed in 490c72868443ff90f47f4ccbaaff1eaf8fed46ab
LinuxLinux	Affected ≥ 057658cb33fbf4d4309f01fe8845903b1cd07fad, < 291c9e137b7c74e8a512cded4845352da4c4adda	Fixed in 291c9e137b7c74e8a512cded4845352da4c4adda

Description

In the Linux kernel, the following vulnerability has been resolved: net: bridge: arp/nd proxy: fix reading neigh ha Currently neigh ha address is read directly, but that can result in torn/partial reads if the neigh is being updated. Use neigh_ha_snapshot to take a stable snapshot of the address.

References

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