CVE-2026-80862Hinoki check available

Kernel panic via unserialized page-fragment cache

Published Sep 4, 2026 · Updated Sep 4, 2026

Race condition in the Linux kernel nvme-tcp driver from 6.12 allows attackers to cause a kernel panic during parallel block-device creation. In drivers/nvme/host/tcp.c, parallel request allocation uses a shared page_frag_cache without serialization, corrupting backing-page reference counts and freeing pages prematurely. The affected path requires concurrent NVMe/TCP block-device creation; published material does not establish an attacker privilege level or a remote trigger.

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

What happened

Race condition in the Linux kernel nvme-tcp driver from 6.12 allows attackers to cause a kernel panic during parallel block-device creation. In drivers/nvme/host/tcp.c, parallel request allocation uses a shared page_frag_cache without serialization, corrupting backing-page reference counts and freeing pages prematurely. The affected path requires concurrent NVMe/TCP block-device creation; published material does not establish an attacker privilege level or a remote trigger.

The record

CVE
CVE-2026-80862
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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=4e893ca8117022de68ce1b61c0309e3d17bb8a25 <0a9750263ffacbbd2048a391fd4bd22e2146c57d
  2. Affected versionversion=4e893ca8117022de68ce1b61c0309e3d17bb8a25 <36ac05f7cfd59d90c597071304b14e98090d5dd1
  3. Affected versionversion=4e893ca8117022de68ce1b61c0309e3d17bb8a25 <64561afb42d8390695bf810d9bbd087cbca00291
  4. Affected versionversion=4e893ca8117022de68ce1b61c0309e3d17bb8a25 <6e4cf281558709b92ec2ca3054fe2ffc69266ef9
  5. Affected versionversion=4e893ca8117022de68ce1b61c0309e3d17bb8a25 <d19f98c79f1b7e09e4cdf5c20d626e571e487467
  6. Affected versionversion=6.12

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=4e893ca8117022de68ce1b61c0309e3d17bb8a25 <0a9750263ffacbbd2048a391fd4bd22e2146c57d; version=4e893ca8117022de68ce1b61c0309e3d17bb8a25 <36ac05f7cfd59d90c597071304b14e98090d5dd1; version=4e893ca8117022de68ce1b61c0309e3d17bb8a25 <64561afb42d8390695bf810d9bbd087cbca00291; version=4e893ca8117022de68ce1b61c0309e3d17bb8a25 <6e4cf281558709b92ec2ca3054fe2ffc69266ef9; version=4e893ca8117022de68ce1b61c0309e3d17bb8a25 <d19f98c79f1b7e09e4cdf5c20d626e571e487467; version=6.12

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

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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