CVE-2026-80697

Kernel crash via unset EROFS backing-file path

Published Aug 28, 2026 · Updated Aug 28, 2026

NULL pointer dereference in Linux kernel EROFS page-cache sharing allows local users to crash the kernel through a mincore call. Shared backing files retain a valid inode but leave f_path unset, so __do_sys_mincore dereferences the missing f_path.mnt pointer. The path is reachable only when EROFS page-cache sharing is enabled and a local process invokes mincore on a shared backing file; the demonstrated consequence is a kernel crash.

CVSS severityUnavailable
Unscored
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux kernel EROFS page-cache sharing allows local users to crash the kernel through a mincore call. Shared backing files retain a valid inode but leave f_path unset, so __do_sys_mincore dereferences the missing f_path.mnt pointer. The path is reachable only when EROFS page-cache sharing is enabled and a local process invokes mincore on a shared backing file; the demonstrated consequence is a kernel crash.

The record

CVE
CVE-2026-80697
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=04ba248d02d9eaa3d9077b00a6134caa75fa3e90 <3879657c4ffd81b9a42cf575fc6cb60201032587
  2. Affected versionversion=5.15.217 <5.16
  3. Affected versionversion=5c942ad7df75925ee166e7f0fb36892d8dde376b
  4. Affected versionversion=6.1.184 <6.2
  5. Affected versionversion=6.12.96 <6.13
  6. Affected versionversion=6.18.39 <6.19
  7. Affected versionversion=6.6.145 <6.7
  8. Affected versionversion=7.1.4 <7.1.8
  9. Affected versionversion=7368bec565bac3e536cd43579dbde1e715e6ba61
  10. Affected versionversion=744b23aa430d52f5c8e4dbff7d71496d6643bed2
  11. Affected versionversion=8344bdf0629457e532797b42d9d2bbf2a2900bbf
  12. Affected versionversion=b2f3d94ea310bea9d36d53e9d9b3f45e86c1d893
  13. Affected versionversion=e187bc02f8fa4226d62814592cf064ee4557c470 <96b2dbbe58a1ea5df8d29c2fe24b5f04715f4443

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=04ba248d02d9eaa3d9077b00a6134caa75fa3e90 <3879657c4ffd81b9a42cf575fc6cb60201032587; version=5.15.217 <5.16; version=5c942ad7df75925ee166e7f0fb36892d8dde376b; version=6.1.184 <6.2; version=6.12.96 <6.13; version=6.18.39 <6.19; version=6.6.145 <6.7; version=7.1.4 <7.1.8; version=7368bec565bac3e536cd43579dbde1e715e6ba61; version=744b23aa430d52f5c8e4dbff7d71496d6643bed2; version=8344bdf0629457e532797b42d9d2bbf2a2900bbf; version=b2f3d94ea310bea9d36d53e9d9b3f45e86c1d893; version=e187bc02f8fa4226d62814592cf064ee4557c470 <96b2dbbe58a1ea5df8d29c2fe24b5f04715f4443

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.

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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
PrivilegesUnavailable
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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