CVE-2026-72101

Kernel memory disclosure via zero-length metadata clearing

Published Aug 15, 2026 · Updated Aug 15, 2026

Uninitialized memory disclosure in dm-integrity in the Linux kernel allows local users to read kernel memory through integrity metadata. In drivers/md/dm-integrity.c, the write path gives memset a zero length by subtracting tuple size from itself rather than subtracting tag size, leaving each integrity payload tail uncleared. Reachability requires low local privileges and a hash size smaller than the device tuple size; the reported consequence is disclosure of residual kernel memory.

CVSS severity3.3
Low
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uninitialized memory disclosure in dm-integrity in the Linux kernel allows local users to read kernel memory through integrity metadata. In drivers/md/dm-integrity.c, the write path gives memset a zero length by subtracting tuple size from itself rather than subtracting tag size, leaving each integrity payload tail uncleared. Reachability requires low local privileges and a hash size smaller than the device tuple size; the reported consequence is disclosure of residual kernel memory.

The record

CVE
CVE-2026-72101
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1005
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=6.11
  2. Affected versionversion=fb0987682c629c1d2c476f35f6fde405a5e304a4 <0c4e9bb1d4101030f55c869f18bd3ece39a77bbb
  3. Affected versionversion=fb0987682c629c1d2c476f35f6fde405a5e304a4 <50af3e51dc709384701dbc721b4bd865285c5f2c
  4. Affected versionversion=fb0987682c629c1d2c476f35f6fde405a5e304a4 <7bb03b2b01b814a9fc14afbfc2cbb2cca5b34750
  5. Affected versionversion=fb0987682c629c1d2c476f35f6fde405a5e304a4 <8f0af8493009a61b4313e0a8c6e03fbc36fd43f9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=fb0987682c629c1d2c476f35f6fde405a5e304a4 <0c4e9bb1d4101030f55c869f18bd3ece39a77bbb; version=fb0987682c629c1d2c476f35f6fde405a5e304a4 <50af3e51dc709384701dbc721b4bd865285c5f2c; version=fb0987682c629c1d2c476f35f6fde405a5e304a4 <7bb03b2b01b814a9fc14afbfc2cbb2cca5b34750; version=fb0987682c629c1d2c476f35f6fde405a5e304a4 <8f0af8493009a61b4313e0a8c6e03fbc36fd43f9

Published CVSS scores

5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

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

T1005Data from Local System

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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