CVE-2026-80538Hinoki check available

Kernel crash via swallowed XFS inode-load errors

Published Aug 26, 2026 · Updated Aug 27, 2026

Incorrect return-value handling in XFS growfs in affected Linux kernels allows local users to crash the kernel or corrupt realtime metadata. The xfs_rtginode_ensure() function treats every xfs_rtginode_load() error except -ENOENT as success, leaving the realtime group inode unset while growfs continues. Exploitation requires CAP_SYS_ADMIN, write access to a realtime-enabled XFS mount, and an induced I/O, allocation, or corruption error; the bounded effects are a kernel crash or on-disk metadata corruption.

CVSS severity7.1
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Incorrect return-value handling in XFS growfs in affected Linux kernels allows local users to crash the kernel or corrupt realtime metadata. The xfs_rtginode_ensure() function treats every xfs_rtginode_load() error except -ENOENT as success, leaving the realtime group inode unset while growfs continues. Exploitation requires CAP_SYS_ADMIN, write access to a realtime-enabled XFS mount, and an induced I/O, allocation, or corruption error; the bounded effects are a kernel crash or on-disk metadata corruption.

The record

CVE
CVE-2026-80538
Published
Aug 26, 2026
Updated
Aug 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-253, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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=6.13
  2. Affected versionversion=ae897e0bed0f5461a6b1c3259c7d899759ba2a62 <61c5165f02deb2eed9b6b539bb279e6629fee652
  3. Affected versionversion=ae897e0bed0f5461a6b1c3259c7d899759ba2a62 <b7e53968cb8882c2d276429ea8550848a4940874
  4. Affected versionversion=ae897e0bed0f5461a6b1c3259c7d899759ba2a62 <ec19cea4ef1ce9d6e2e3f7e9e7bf88ede31176e7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.13; version=ae897e0bed0f5461a6b1c3259c7d899759ba2a62 <61c5165f02deb2eed9b6b539bb279e6629fee652; version=ae897e0bed0f5461a6b1c3259c7d899759ba2a62 <b7e53968cb8882c2d276429ea8550848a4940874; version=ae897e0bed0f5461a6b1c3259c7d899759ba2a62 <ec19cea4ef1ce9d6e2e3f7e9e7bf88ede31176e7

Published CVSS scores

7.1Linux CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/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-253Incorrect Check of Function Return Value
T1499Endpoint Denial of Service

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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