CVE-2026-63798

Kernel crash via dangling interrupt resources

Published Jul 19, 2026 · Updated Jul 19, 2026

Use-after-free in the imgpdc interrupt controller on affected Linux Kernel branches allows local users to crash the kernel after driver removal. pdc_intc_remove() removes the IRQ domain without freeing its generic chips or clearing peripheral and syswake chained handlers, leaving global-list entries and handler pointers to freed driver memory. The imgpdc driver must be present and removed; later suspend, resume, shutdown, or spurious interrupt processing dereferences the stale resources and crashes the host.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the imgpdc interrupt controller on affected Linux Kernel branches allows local users to crash the kernel after driver removal. pdc_intc_remove() removes the IRQ domain without freeing its generic chips or clearing peripheral and syswake chained handlers, leaving global-list entries and handler pointers to freed driver memory. The imgpdc driver must be present and removed; later suspend, resume, shutdown, or spurious interrupt processing dereferences the stale resources and crashes the host.

The record

CVE
CVE-2026-63798
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 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=3.12
  2. Affected versionversion=b6ef9161e43ad58c3824bd76dc87716276f0cd70 <0405a65e4ebd9eac13a765f9f02ac05851ca5421
  3. Affected versionversion=b6ef9161e43ad58c3824bd76dc87716276f0cd70 <37738fdf2ab1e504d1c63ce5bc0aeb6452d8f057
  4. Affected versionversion=b6ef9161e43ad58c3824bd76dc87716276f0cd70 <41826e5297e67cd96a0a46fde06a5069a8ce436a
  5. Affected versionversion=b6ef9161e43ad58c3824bd76dc87716276f0cd70 <44567537a2623dcd2b4018a7f043cf8069579e5d
  6. Affected versionversion=b6ef9161e43ad58c3824bd76dc87716276f0cd70 <8176773dfceae7978b01c20b233693e072053700
  7. Affected versionversion=b6ef9161e43ad58c3824bd76dc87716276f0cd70 <83d7ec14b0938ad8cae008058fd6f912f4a9a312
  8. Affected versionversion=b6ef9161e43ad58c3824bd76dc87716276f0cd70 <b3a3831b2eb884641906fc5e46207b205b6aea13
  9. Affected versionversion=b6ef9161e43ad58c3824bd76dc87716276f0cd70 <c2c7733101bb8c0b29ac9ee41073eaf602821a59

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.12; version=b6ef9161e43ad58c3824bd76dc87716276f0cd70 <0405a65e4ebd9eac13a765f9f02ac05851ca5421; version=b6ef9161e43ad58c3824bd76dc87716276f0cd70 <37738fdf2ab1e504d1c63ce5bc0aeb6452d8f057; version=b6ef9161e43ad58c3824bd76dc87716276f0cd70 <41826e5297e67cd96a0a46fde06a5069a8ce436a; version=b6ef9161e43ad58c3824bd76dc87716276f0cd70 <44567537a2623dcd2b4018a7f043cf8069579e5d; version=b6ef9161e43ad58c3824bd76dc87716276f0cd70 <8176773dfceae7978b01c20b233693e072053700; version=b6ef9161e43ad58c3824bd76dc87716276f0cd70 <83d7ec14b0938ad8cae008058fd6f912f4a9a312; version=b6ef9161e43ad58c3824bd76dc87716276f0cd70 <b3a3831b2eb884641906fc5e46207b205b6aea13; version=b6ef9161e43ad58c3824bd76dc87716276f0cd70 <c2c7733101bb8c0b29ac9ee41073eaf602821a59

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

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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

CWE-401Missing Release of Memory after Effective Lifetime
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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