CVE-2026-72107

Kernel crash via offset-miscalculated writeset lookup

Published Aug 15, 2026 · Updated Aug 15, 2026

Out-of-bounds read in Linux dm-era since 3.15 allows local users to crash the kernel through a table with a non-zero start sector. era_map() calculates the writeset block before subtracting the target offset, so metadata_current_marked() can pass an absolute block beyond the in-core bitset to writeset_marked(). Reaching the faulty mapping path requires local access and device-mapper configuration privileges; the documented consequence is a kernel crash.

CVSS severity8.8
High
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Linux dm-era since 3.15 allows local users to crash the kernel through a table with a non-zero start sector. era_map() calculates the writeset block before subtracting the target offset, so metadata_current_marked() can pass an absolute block beyond the in-core bitset to writeset_marked(). Reaching the faulty mapping path requires local access and device-mapper configuration privileges; the documented consequence is a kernel crash.

The record

CVE
CVE-2026-72107
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499.004
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=3.15
  2. Affected versionversion=eec40579d84873dfb7021eb24c50360f073237c5 <1fcb5e29dd7a5b85adb9d8b539911741d878e829
  3. Affected versionversion=eec40579d84873dfb7021eb24c50360f073237c5 <7e1822f83c5a1ee7b4a19e98edde8770a10b4c71
  4. Affected versionversion=eec40579d84873dfb7021eb24c50360f073237c5 <9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f
  5. Affected versionversion=eec40579d84873dfb7021eb24c50360f073237c5 <a868196f03c2b19418ae3d2b69e195d668a271e5
  6. Affected versionversion=eec40579d84873dfb7021eb24c50360f073237c5 <bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6
  7. Affected versionversion=eec40579d84873dfb7021eb24c50360f073237c5 <db5f9b4601f0012038e5a2628aedec2f47933380
  8. Affected versionversion=eec40579d84873dfb7021eb24c50360f073237c5 <e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5
  9. Affected versionversion=eec40579d84873dfb7021eb24c50360f073237c5 <fe94a0b14010a3c267ff9a2508afb4f27ff1c5bf

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.15; version=eec40579d84873dfb7021eb24c50360f073237c5 <1fcb5e29dd7a5b85adb9d8b539911741d878e829; version=eec40579d84873dfb7021eb24c50360f073237c5 <7e1822f83c5a1ee7b4a19e98edde8770a10b4c71; version=eec40579d84873dfb7021eb24c50360f073237c5 <9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f; version=eec40579d84873dfb7021eb24c50360f073237c5 <a868196f03c2b19418ae3d2b69e195d668a271e5; version=eec40579d84873dfb7021eb24c50360f073237c5 <bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6; version=eec40579d84873dfb7021eb24c50360f073237c5 <db5f9b4601f0012038e5a2628aedec2f47933380; version=eec40579d84873dfb7021eb24c50360f073237c5 <e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5; version=eec40579d84873dfb7021eb24c50360f073237c5 <fe94a0b14010a3c267ff9a2508afb4f27ff1c5bf

Published CVSS scores

4.4Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
8.8cve.orgCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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-125Out-of-bounds Read
T1499.004Application or System Exploitation

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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