CVE-2026-98179

MMIO mapping leak via skipped device-removal unmap

Published Oct 6, 2026 · Updated Oct 6, 2026

An MMIO mapping leak in Linux's AMDGPU driver leaves register BAR mappings allocated during device removal. The amdgpu_pci_remove path calls drm_dev_unplug before fini_sw, making drm_dev_enter false and skipping the guarded iounmap of rmmio. Each hot-unplug or module unload leaves one mapping behind; the published fix does not establish an unauthenticated network trigger or a further consequence.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Oct 20, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An MMIO mapping leak in Linux's AMDGPU driver leaves register BAR mappings allocated during device removal. The amdgpu_pci_remove path calls drm_dev_unplug before fini_sw, making drm_dev_enter false and skipping the guarded iounmap of rmmio. Each hot-unplug or module unload leaves one mapping behind; the published fix does not establish an unauthenticated network trigger or a further consequence.

The record

CVE
CVE-2026-98179
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 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=5.17
  2. Affected versionversion=62d5f9f7110ad374db67ab4820f4ff2d916c3cdb <5155002b03b24ba3ef91c5c313b8cf0171b24904
  3. Affected versionversion=62d5f9f7110ad374db67ab4820f4ff2d916c3cdb <a645584c3ccc493ee835f77155829442bd7578c3
  4. Affected versionversion=62d5f9f7110ad374db67ab4820f4ff2d916c3cdb <cd55dde2b63789a3dafe982c89844f537501d096
  5. Affected versionversion=62d5f9f7110ad374db67ab4820f4ff2d916c3cdb <e81502d6791df9ecd003bfb2ca44f0d1f1b38439

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.17; version=62d5f9f7110ad374db67ab4820f4ff2d916c3cdb <5155002b03b24ba3ef91c5c313b8cf0171b24904; version=62d5f9f7110ad374db67ab4820f4ff2d916c3cdb <a645584c3ccc493ee835f77155829442bd7578c3; version=62d5f9f7110ad374db67ab4820f4ff2d916c3cdb <cd55dde2b63789a3dafe982c89844f537501d096; version=62d5f9f7110ad374db67ab4820f4ff2d916c3cdb <e81502d6791df9ecd003bfb2ca44f0d1f1b38439

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.

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
PrivilegesUnavailable
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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