CVE-2026-46065

Kernel memory corruption via stale framebuffer mapping

Published May 27, 2026 · Updated May 27, 2026

Use-after-free in Linux Kernel fbdev deferred I/O allows local users to access freed kernel state through a stale graphics mapping. Device hot-unplug frees struct fb_info while an existing mapping retains deferred-I/O state that still refers to the removed framebuffer. Access requires permission to map /dev/fbN and device removal while that mapping remains open; later access operates on undefined kernel state instead of receiving SIGBUS.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Use-after-free in Linux Kernel fbdev deferred I/O allows local users to access freed kernel state through a stale graphics mapping. Device hot-unplug frees struct fb_info while an existing mapping retains deferred-I/O state that still refers to the removed framebuffer. Access requires permission to map /dev/fbN and device removal while that mapping remains open; later access operates on undefined kernel state instead of receiving SIGBUS.

The record

CVE
CVE-2026-46065
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=2.6.22
  2. Affected versionversion=60b59beafba875aef6d378078bce0baf2287ae14 <25c2b77bc463f29ee71a54b883548baf9386a0db
  3. Affected versionversion=60b59beafba875aef6d378078bce0baf2287ae14 <2a40f8bc9bb713329f1c35ffc199ee961a7135b0
  4. Affected versionversion=60b59beafba875aef6d378078bce0baf2287ae14 <2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066
  5. Affected versionversion=60b59beafba875aef6d378078bce0baf2287ae14 <9ded47ad003f09a94b6a710b5c47f4aa5ceb7429
  6. Affected versionversion=60b59beafba875aef6d378078bce0baf2287ae14 <a0aafb421dd15e935d81543152617f2742cefa70

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2.6.22; version=60b59beafba875aef6d378078bce0baf2287ae14 <25c2b77bc463f29ee71a54b883548baf9386a0db; version=60b59beafba875aef6d378078bce0baf2287ae14 <2a40f8bc9bb713329f1c35ffc199ee961a7135b0; version=60b59beafba875aef6d378078bce0baf2287ae14 <2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066; version=60b59beafba875aef6d378078bce0baf2287ae14 <9ded47ad003f09a94b6a710b5c47f4aa5ceb7429; version=60b59beafba875aef6d378078bce0baf2287ae14 <a0aafb421dd15e935d81543152617f2742cefa70

Published CVSS scores

4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8CanonicalCVSS: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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo