CVE-2026-72153

Stale interrupt routing via zeroed IRQ index

Published Aug 15, 2026 · Updated Aug 15, 2026

Resource-release failure in the Linux kernel irqchip crossbar allows local users to leave a source interrupt routed after domain teardown. crossbar_domain_free() clears irq_data->hwirq, then wrongly reuses that zeroed value instead of the parent GIC SPI index for irq_map[] and the crossbar register. Reachability requires local access and affected crossbar hardware; the CNA documents persistent interrupt routing but no further security consequence.

CVSS severity3.4
Low
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource-release failure in the Linux kernel irqchip crossbar allows local users to leave a source interrupt routed after domain teardown. crossbar_domain_free() clears irq_data->hwirq, then wrongly reuses that zeroed value instead of the parent GIC SPI index for irq_map[] and the crossbar register. Reachability requires local access and affected crossbar hardware; the CNA documents persistent interrupt routing but no further security consequence.

The record

CVE
CVE-2026-72153
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=4.1
  2. Affected versionversion=783d31863fb826f1a3754a2d5959a022a1b12d54 <043db005a8d6932dc7d217c86307e9af0bc10ddc
  3. Affected versionversion=783d31863fb826f1a3754a2d5959a022a1b12d54 <13bdb5140405ff283f9052e65ee1d5c2303765c7
  4. Affected versionversion=783d31863fb826f1a3754a2d5959a022a1b12d54 <1c48dc6a0c1ef47a9fa24611e60bc2f4ee4dd0df
  5. Affected versionversion=783d31863fb826f1a3754a2d5959a022a1b12d54 <36ca587f55a2c04468a89fd16174bb2f78dc04ec
  6. Affected versionversion=783d31863fb826f1a3754a2d5959a022a1b12d54 <424130169dc03b84ea604685409726d61bcec859
  7. Affected versionversion=783d31863fb826f1a3754a2d5959a022a1b12d54 <cca649a23a5fc8aae536fc27a0546c67690a4078
  8. Affected versionversion=783d31863fb826f1a3754a2d5959a022a1b12d54 <ccc3664679763d2d6f067c28729bdff627bb72d0
  9. Affected versionversion=783d31863fb826f1a3754a2d5959a022a1b12d54 <e5be5d452d5f1efbb3342da2b00029be6c99034e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.1; version=783d31863fb826f1a3754a2d5959a022a1b12d54 <043db005a8d6932dc7d217c86307e9af0bc10ddc; version=783d31863fb826f1a3754a2d5959a022a1b12d54 <13bdb5140405ff283f9052e65ee1d5c2303765c7; version=783d31863fb826f1a3754a2d5959a022a1b12d54 <1c48dc6a0c1ef47a9fa24611e60bc2f4ee4dd0df; version=783d31863fb826f1a3754a2d5959a022a1b12d54 <36ca587f55a2c04468a89fd16174bb2f78dc04ec; version=783d31863fb826f1a3754a2d5959a022a1b12d54 <424130169dc03b84ea604685409726d61bcec859; version=783d31863fb826f1a3754a2d5959a022a1b12d54 <cca649a23a5fc8aae536fc27a0546c67690a4078; version=783d31863fb826f1a3754a2d5959a022a1b12d54 <ccc3664679763d2d6f067c28729bdff627bb72d0; version=783d31863fb826f1a3754a2d5959a022a1b12d54 <e5be5d452d5f1efbb3342da2b00029be6c99034e

Published CVSS scores

3.4SUSECVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
3.4Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-772Missing Release of Resource after Effective Lifetime

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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