CVE-2026-72026

Service interruption via IMSIC firmware-node leak

Published Aug 15, 2026 · Updated Aug 15, 2026

Resource leakage in Linux kernel 6.12 RISC-V IMSIC initialization allows local users to exhaust memory after state-setup failures. imsic_early_acpi_init() allocates a firmware node before imsic_setup_state() and fails to release it or clear the global pointer on that error path. The path requires RISC-V IMSIC ACPI initialization and a state-setup error; accumulated leaks can destabilize the system and interrupt service.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leakage in Linux kernel 6.12 RISC-V IMSIC initialization allows local users to exhaust memory after state-setup failures. imsic_early_acpi_init() allocates a firmware node before imsic_setup_state() and fails to release it or clear the global pointer on that error path. The path requires RISC-V IMSIC ACPI initialization and a state-setup error; accumulated leaks can destabilize the system and interrupt service.

The record

CVE
CVE-2026-72026
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772
Attack vector
local
Privileges
authenticated

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=6.12
  2. Affected versionversion=fbe826b1c10699a70b81a441fe47b817d1019f37 <1358126fbed104e5657955d3ba029b283687ba02
  3. Affected versionversion=fbe826b1c10699a70b81a441fe47b817d1019f37 <a27f17bad38c5fea3c73281517869af0089a0451
  4. Affected versionversion=fbe826b1c10699a70b81a441fe47b817d1019f37 <a5a367756926de1c21a013ea5ed7fc2219f4cb4f
  5. Affected versionversion=fbe826b1c10699a70b81a441fe47b817d1019f37 <b321a046d7717225c07ba3f4b7b0a4758c2f9d58

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.12; version=fbe826b1c10699a70b81a441fe47b817d1019f37 <1358126fbed104e5657955d3ba029b283687ba02; version=fbe826b1c10699a70b81a441fe47b817d1019f37 <a27f17bad38c5fea3c73281517869af0089a0451; version=fbe826b1c10699a70b81a441fe47b817d1019f37 <a5a367756926de1c21a013ea5ed7fc2219f4cb4f; version=fbe826b1c10699a70b81a441fe47b817d1019f37 <b321a046d7717225c07ba3f4b7b0a4758c2f9d58

Published CVSS scores

5.5Red HatCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
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.

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Technologies

Your stack

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Your stack

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