CVE-2026-72105

Kernel service interruption via dm-log size wraparound

Published Aug 15, 2026 · Updated Aug 15, 2026

Integer overflow in dm-log on affected 32-bit Linux kernels allows local users to interrupt service through a crafted region count. The bitmap sizing calculation rounds region_count to BITS_PER_LONG in a 32-bit size_t, causing bitset_size to wrap from 2^32 to zero before allocation. Reachability requires a 32-bit kernel and a region count in the narrow range that rounds to 2^32; the resulting allocation failure denies service.

CVSS severity7.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in dm-log on affected 32-bit Linux kernels allows local users to interrupt service through a crafted region count. The bitmap sizing calculation rounds region_count to BITS_PER_LONG in a 32-bit size_t, causing bitset_size to wrap from 2^32 to zero before allocation. Reachability requires a 32-bit kernel and a region count in the narrow range that rounds to 2^32; the resulting allocation failure denies service.

The record

CVE
CVE-2026-72105
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-190, 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=12bd5b88e91a02785244ff1d20fb157e96e9cdc8 <1c3412b584e1fb6c665ff33ba7259253bc0082cb
  2. Affected versionversion=3ec74da927b4e171a6fc0e77b1188ba4d019af51 <567602fa72d57169365cbc589e0b8c3be900636d
  3. Affected versionversion=44ab8875ae4a2842bde2d756bed195d375e0debb <cdc4ddf9db2cb79f4ab86b1a509b7ac21b0b6cf5
  4. Affected versionversion=4ec8323b9f0764a14d532b1ae9b87f8a9fecb867
  5. Affected versionversion=5.10.258 <5.10.261
  6. Affected versionversion=5.15.209 <5.15.212
  7. Affected versionversion=6.1.175 <6.1.178
  8. Affected versionversion=6.12.91 <6.12.97
  9. Affected versionversion=6.18.33 <6.18.40
  10. Affected versionversion=6.6.141 <6.6.145
  11. Affected versionversion=7.0.10 <7.1
  12. Affected versionversion=7.1
  13. Affected versionversion=b455903eed4558982be0811f5b7f44f6bbc4ff57 <e0b0163a65758ec3a2361ae1cea407898c27f21e
  14. Affected versionversion=c20e36b7631d83e7535877f08af8b0af72c44b1a <79feb87ab2396d49b9b65e4bb815d33cc71cba47
  15. Affected versionversion=c20e36b7631d83e7535877f08af8b0af72c44b1a <9743132a41f4d9d0e54c5f2adcb821b04796bab1
  16. Affected versionversion=d4ac87567f86a55c3c92e9a5144dcd943a9772a1 <d05e0edfecf5260e6dddd28b2f0cce02bfc6ed7a
  17. Affected versionversion=defe483e47173768c227532694dc78cb65db5f09 <4b0de5a3ac1fd42acb0dc1f80ac5747e3287d723

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=12bd5b88e91a02785244ff1d20fb157e96e9cdc8 <1c3412b584e1fb6c665ff33ba7259253bc0082cb; version=3ec74da927b4e171a6fc0e77b1188ba4d019af51 <567602fa72d57169365cbc589e0b8c3be900636d; version=44ab8875ae4a2842bde2d756bed195d375e0debb <cdc4ddf9db2cb79f4ab86b1a509b7ac21b0b6cf5; version=4ec8323b9f0764a14d532b1ae9b87f8a9fecb867; version=5.10.258 <5.10.261; version=5.15.209 <5.15.212; version=6.1.175 <6.1.178; version=6.12.91 <6.12.97; version=6.18.33 <6.18.40; version=6.6.141 <6.6.145; version=7.0.10 <7.1; version=7.1; version=b455903eed4558982be0811f5b7f44f6bbc4ff57 <e0b0163a65758ec3a2361ae1cea407898c27f21e; version=c20e36b7631d83e7535877f08af8b0af72c44b1a <79feb87ab2396d49b9b65e4bb815d33cc71cba47; version=c20e36b7631d83e7535877f08af8b0af72c44b1a <9743132a41f4d9d0e54c5f2adcb821b04796bab1; version=d4ac87567f86a55c3c92e9a5144dcd943a9772a1 <d05e0edfecf5260e6dddd28b2f0cce02bfc6ed7a; version=defe483e47173768c227532694dc78cb65db5f09 <4b0de5a3ac1fd42acb0dc1f80ac5747e3287d723

Published CVSS scores

7.8CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.4Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
7.8NVDCVSS:3.1/AV:L/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.

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

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-190Integer Overflow or Wraparound
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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