CVE-2026-90363

Kernel crash via duplicate KMS cleanup

Published Sep 17, 2026 · Updated Sep 17, 2026

Use-after-free in Linux 6.7 drm/msm allows attackers to crash the kernel when MDP4 or MDP5 display initialization fails. The mdp4_kms_init() and mdp5_kms_init() error paths free KMS state before msm_drm_init() invokes common cleanup on that same state. Reachability requires partial initialization failure in an affected display driver; an attacker-controlled trigger and impacts beyond the crash are not documented.

CVSS severity5.3
Medium
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux 6.7 drm/msm allows attackers to crash the kernel when MDP4 or MDP5 display initialization fails. The mdp4_kms_init() and mdp5_kms_init() error paths free KMS state before msm_drm_init() invokes common cleanup on that same state. Reachability requires partial initialization failure in an affected display driver; an attacker-controlled trigger and impacts beyond the crash are not documented.

The record

CVE
CVE-2026-90363
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

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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=506efcba31296e9cbc4f8f148eec1e4b29039931 <08827aa40f0ee9d37dcff8d6acb340b970051486
  2. Affected versionversion=506efcba31296e9cbc4f8f148eec1e4b29039931 <93c125e4ea98fb25f927ba5a334d85845127d667
  3. Affected versionversion=506efcba31296e9cbc4f8f148eec1e4b29039931 <e2a99fa93b400dfbb9598103249f71969501094a
  4. Affected versionversion=6.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=506efcba31296e9cbc4f8f148eec1e4b29039931 <08827aa40f0ee9d37dcff8d6acb340b970051486; version=506efcba31296e9cbc4f8f148eec1e4b29039931 <93c125e4ea98fb25f927ba5a334d85845127d667; version=506efcba31296e9cbc4f8f148eec1e4b29039931 <e2a99fa93b400dfbb9598103249f71969501094a; version=6.7

Published CVSS scores

5.5TenableCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.9TenableAV:L/AC:L/Au:N/C:N/I:N/A:C
5.3Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
5.5TenableCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.1TenableCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C

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

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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