CVE-2026-97488

Kernel crash via unchecked block-size setup

Published Sep 24, 2026 · Updated Sep 24, 2026

Denial of service in the Linux qnx4 filesystem before 6.12.111 and before 6.18.53 allows local users to crash the kernel during mount. qnx4_fill_super() ignores a failed sb_set_blocksize() call and continues to __bread_gfp(), where folio_set_bh() triggers its offset bounds BUG. Triggering the crash requires administrative mount access, QNX4 filesystem support, and a QNX4 image on a device whose logical sector exceeds 512 bytes.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux qnx4 filesystem before 6.12.111 and before 6.18.53 allows local users to crash the kernel during mount. qnx4_fill_super() ignores a failed sb_set_blocksize() call and continues to __bread_gfp(), where folio_set_bh() triggers its offset bounds BUG. Triggering the crash requires administrative mount access, QNX4 filesystem support, and a QNX4 image on a device whose logical sector exceeds 512 bytes.

The record

CVE
CVE-2026-97488
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <6.12.111
  2. Affected versionversion=0 <6.18.53
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <60f7ccf669882262330171eda51a4f52fa2e69c9
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <aac97a4b3f47c36a47f934aa679407b718b67537
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c7d911ea1cc9a63b07e52f5e75b263be0615b289

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=0 <6.12.111; version=0 <6.18.53; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <60f7ccf669882262330171eda51a4f52fa2e69c9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <aac97a4b3f47c36a47f934aa679407b718b67537; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c7d911ea1cc9a63b07e52f5e75b263be0615b289

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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