CVE-2026-80747Hinoki check available

Kernel heap disclosure via unchecked CRAT length

Published Sep 3, 2026 · Updated Sep 3, 2026

Out-of-bounds read in the Linux kernel before 7.1.10 allows attackers controlling platform firmware to expose adjacent heap data via KFD sysfs. The CRAT loop validates only the eight-byte subtype header before kfd_parse_subtype() widens the pointer to 40- or 64-byte structures and reads fields beyond the allocated image. Reachability requires an AMD APU or GPU system whose firmware supplies a crafted ACPI CRAT; upstream analysis identifies firmware-driven exposure through 6.5 and defense-in-depth hardening from 6.6 onward.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Out-of-bounds read in the Linux kernel before 7.1.10 allows attackers controlling platform firmware to expose adjacent heap data via KFD sysfs. The CRAT loop validates only the eight-byte subtype header before kfd_parse_subtype() widens the pointer to 40- or 64-byte structures and reads fields beyond the allocated image. Reachability requires an AMD APU or GPU system whose firmware supplies a crafted ACPI CRAT; upstream analysis identifies firmware-driven exposure through 6.5 and defense-in-depth hardening from 6.6 onward.

The record

CVE
CVE-2026-80747
Published
Sep 3, 2026
Updated
Sep 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 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=0 <7.1.10
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6e7566ba4739dd573c331adde1c96690f7a567bd
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ca91e0cc8087568e4b791648a7c01e804f48cb73

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=0 <7.1.10; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6e7566ba4739dd573c331adde1c96690f7a567bd; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ca91e0cc8087568e4b791648a7c01e804f48cb73

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
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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