CVE-2026-90217Hinoki check available

Local kernel compromise via BPF iterator state pruning

Published Sep 17, 2026 · Updated Sep 18, 2026

Improper state pruning in the Linux kernel 6.7 through 7.2.5 allows local users to bypass eBPF verifier safety. The verifier comparison in kernel/bpf/states.c treats STACK_ITER slots holding MEM_RCU and PTR_UNTRUSTED pointers as equal, allowing an unsafe path to be pruned. Exploitation requires low-privileged local access and the ability to load a crafted BPF program, after which kernel data can be exposed or altered and service can be interrupted.

CVSS severity7.8
High
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper state pruning in the Linux kernel 6.7 through 7.2.5 allows local users to bypass eBPF verifier safety. The verifier comparison in kernel/bpf/states.c treats STACK_ITER slots holding MEM_RCU and PTR_UNTRUSTED pointers as equal, allowing an unsafe path to be pruned. Exploitation requires low-privileged local access and the ability to load a crafted BPF program, after which kernel data can be exposed or altered and service can be interrupted.

The record

CVE
CVE-2026-90217
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=6.7
  2. Affected versionversion=dfab99df147b0d364f0c199f832ff2aedfb2265a <6424b9cde9edc7f2098115bbfd1ee3d84a958380
  3. Affected versionversion=dfab99df147b0d364f0c199f832ff2aedfb2265a <83608e303b95d07afba1c15da0b5d9e513c2f15a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.7; version=dfab99df147b0d364f0c199f832ff2aedfb2265a <6424b9cde9edc7f2098115bbfd1ee3d84a958380; version=dfab99df147b0d364f0c199f832ff2aedfb2265a <83608e303b95d07afba1c15da0b5d9e513c2f15a

Published CVSS scores

7.8Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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