CVE-2026-90051Hinoki check available

Unspecified impact via non-zerocopy devmem transmission

Published Sep 17, 2026 · Updated Sep 18, 2026

Improper validation in Linux allows attackers to cause unspecified impact by submitting a devmem TCP transmit request without zero-copy. tcp_sendmsg_locked() takes the copy path from an iovec containing dma-buf offsets when NETIF_F_SG is absent, permitting net-iov and page fragments to be mixed in one skb and breaking kernel invariants. The path requires an io_uring request carrying dmabuf_id and zero-copy flags without the corresponding devmem binding; no more specific consequence is published.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
Next 30 days · Oct 20, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper validation in Linux allows attackers to cause unspecified impact by submitting a devmem TCP transmit request without zero-copy. tcp_sendmsg_locked() takes the copy path from an iovec containing dma-buf offsets when NETIF_F_SG is absent, permitting net-iov and page fragments to be mixed in one skb and breaking kernel invariants. The path requires an io_uring request carrying dmabuf_id and zero-copy flags without the corresponding devmem binding; no more specific consequence is published.

The record

CVE
CVE-2026-90051
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.16
  2. Affected versionversion=bd61848900bff597764238f3a8ec67c815cd316e <125755776bc6d4dd53eaf551c87e3d460625d638
  3. Affected versionversion=bd61848900bff597764238f3a8ec67c815cd316e <2151b2bcf6fcec52665f606eed20da068447f0b7
  4. Affected versionversion=bd61848900bff597764238f3a8ec67c815cd316e <b04326c7927af7048fd4e730f5770cca350d0a60

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.16; version=bd61848900bff597764238f3a8ec67c815cd316e <125755776bc6d4dd53eaf551c87e3d460625d638; version=bd61848900bff597764238f3a8ec67c815cd316e <2151b2bcf6fcec52665f606eed20da068447f0b7; version=bd61848900bff597764238f3a8ec67c815cd316e <b04326c7927af7048fd4e730f5770cca350d0a60

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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