CVE-2026-92495Hinoki check available

Unauthorized page writes via retained mmap permissions

Published Sep 17, 2026 · Updated Sep 17, 2026

Permission bypass in Linux 6.6 bnxt_re allows local users to write protected DBR and toggle pages via mprotect(PROT_WRITE). The bnxt_re_mmap() function rejects initially writable mappings but leaves VM_MAYWRITE set on read-only mappings, permitting later write-permission changes. Exploitation requires access to the driver's userspace mapping interface; the established consequence is unauthorized writes to those pages, not arbitrary kernel execution.

CVSS severity3.3
Low
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Permission bypass in Linux 6.6 bnxt_re allows local users to write protected DBR and toggle pages via mprotect(PROT_WRITE). The bnxt_re_mmap() function rejects initially writable mappings but leaves VM_MAYWRITE set on read-only mappings, permitting later write-permission changes. Exploitation requires access to the driver's userspace mapping interface; the established consequence is unauthorized writes to those pages, not arbitrary kernel execution.

The record

CVE
CVE-2026-92495
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=6.6
  2. Affected versionversion=ea222485788208cd79bad42d25aae9232b33a934 <0afbfe019c881483337d9f8304e678af05ebe7cc
  3. Affected versionversion=ea222485788208cd79bad42d25aae9232b33a934 <13e7861809ef9e7e720ff5f0af1d4293a6d0a9b4
  4. Affected versionversion=ea222485788208cd79bad42d25aae9232b33a934 <518df61b9b0a5b288dfa72c87246045329c18b8c
  5. Affected versionversion=ea222485788208cd79bad42d25aae9232b33a934 <5361fb1e5bc246f9a2c0721543f72c8dac200769
  6. Affected versionversion=ea222485788208cd79bad42d25aae9232b33a934 <9b66c9af7172ffcf727214fa0ebe9a5e1ed6eb16

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.6; version=ea222485788208cd79bad42d25aae9232b33a934 <0afbfe019c881483337d9f8304e678af05ebe7cc; version=ea222485788208cd79bad42d25aae9232b33a934 <13e7861809ef9e7e720ff5f0af1d4293a6d0a9b4; version=ea222485788208cd79bad42d25aae9232b33a934 <518df61b9b0a5b288dfa72c87246045329c18b8c; version=ea222485788208cd79bad42d25aae9232b33a934 <5361fb1e5bc246f9a2c0721543f72c8dac200769; version=ea222485788208cd79bad42d25aae9232b33a934 <9b66c9af7172ffcf727214fa0ebe9a5e1ed6eb16

Published CVSS scores

2.1TenableAV:L/AC:L/Au:N/C:N/I:P/A:N
7.8TenableCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.6Tenable NessusAV:L/AC:L/Au:N/C:P/I:P/A:N
3.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
7.8Tenable NessusCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.3SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

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.

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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

No sourced classifications are available.

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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