---
id: CVE-2026-72107
title: >-
  kernel: dm era: fix out-of-bounds memory access for non-zero start sector
  (CVE-2026-72107)
summary: >-
  A flaw was found in the Linux kernel's device-mapper (dm-era) component. This
  vulnerability arises from an incorrect calculation of writeset blocks, which
  can lead to an out-of-bounds memory access. An attacker could potentially
  exploit th…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-125
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 6
  - enterprise_linux 8
  - enterprise_linux 9
published: '2026-08-15'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T11:08:44+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72107.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72107.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-72107'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2516419'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-72107'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72107'
  - url: 'https://kernelcve.org/list/?q=CVE-2026-72107'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026081526-CVE-2026-72107-0676@gregkh/T
  - url: 'https://git.kernel.org/stable/c/fe94a0b14010a3c267ff9a2508afb4f27ff1c5bf'
  - url: 'https://git.kernel.org/stable/c/e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5'
  - url: 'https://git.kernel.org/stable/c/9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f'
  - url: 'https://git.kernel.org/stable/c/7e1822f83c5a1ee7b4a19e98edde8770a10b4c71'
  - url: 'https://git.kernel.org/stable/c/db5f9b4601f0012038e5a2628aedec2f47933380'
  - url: 'https://git.kernel.org/stable/c/1fcb5e29dd7a5b85adb9d8b539911741d878e829'
  - url: 'https://git.kernel.org/stable/c/bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6'
  - url: 'https://git.kernel.org/stable/c/a868196f03c2b19418ae3d2b69e195d668a271e5'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.0065
epssPercentile: 0.50968
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:52:12.284460Z'
scores:
  vendor: 5.5
  cna: 8.8
ingestedAt: '2026-10-16T17:24:46.878Z'
---

## Overview

A flaw was found in the Linux kernel's device-mapper (dm-era) component. This vulnerability arises from an incorrect calculation of writeset blocks, which can lead to an out-of-bounds memory access. An attacker could potentially exploit this to cause a denial of service or other undefined behavior due to memory corruption.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72107.json)

**kernel: dm era: fix out-of-bounds memory access for non-zero start sector** — rated Moderate by Red Hat. Released 2026-08-15, updated 2026-10-26.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9

No fix planned:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9

Not affected:

- Red Hat Enterprise Linux 7

## Remediation

Out of support scope

Workarounds / mitigations:

- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.