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NVD / CVE Program· CNA Linux

CVE-2026-72107: dm era: fix out-of-bounds memory access for non-zero start sector

Noroxi assessment

Priority: Monitor (action score 35/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.65% (FIRST EPSS); higher than 50.8% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 1fcb5e29dd7a5b85adb9d8b539911741d878e829, 7e1822f83c5a1ee7b4a19e98edde8770a10b4c71, 9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f.

Low priority for now. Upgrade to Linux Linux 1fcb5e29dd7a5b85adb9d8b539911741d878e829, 7e1822f83c5a1ee7b4a19e98edde8770a10b4c71, 9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: dm era: fix out-of-bounds memory access for non-zero start sector dm-era tracks writes in target-relative blocks, but era_map() calculates the writeset block before applying the target offset. Tables with a non-zero start sector can therefore pass an absolute mapped-device block to metadata_current_marked(). If the absolute block is beyond the current writeset size, writeset_marked() tests past the end of the in-core bitset. KASAN reports this as a vmalloc-out-of-bounds access. Apply the target offset before calculating the era block so writeset lookups use the target-relative block number.

HighCVSS 8.8 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Oct 19, 2026
EPSS
0.6% · 50th percentile

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
8.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-72107

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.15affected
    • eec40579d84873dfb7021eb24c50360f073237c5 and later · before fe94a0b14010a3c267ff9a2508afb4f27ff1c5bfaffected · git
    • eec40579d84873dfb7021eb24c50360f073237c5 and later · before e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5affected · git
    • eec40579d84873dfb7021eb24c50360f073237c5 and later · before 9946a7176bd8c25ddd6e5f1799c54e572ee6bf0faffected · git
    • eec40579d84873dfb7021eb24c50360f073237c5 and later · before 7e1822f83c5a1ee7b4a19e98edde8770a10b4c71affected · git
    • eec40579d84873dfb7021eb24c50360f073237c5 and later · before db5f9b4601f0012038e5a2628aedec2f47933380affected · git
    • eec40579d84873dfb7021eb24c50360f073237c5 and later · before 1fcb5e29dd7a5b85adb9d8b539911741d878e829affected · git
    • eec40579d84873dfb7021eb24c50360f073237c5 and later · before bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6affected · git
    • eec40579d84873dfb7021eb24c50360f073237c5 and later · before a868196f03c2b19418ae3d2b69e195d668a271e5affected · git
    • before 3.15not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-72103Aug 15, 2026 · dm: avoid leaking the caller's thread keyring via the table device file
    29Monitor
  • ← EarlierCVE-2026-72105Aug 15, 2026 · dm-log: fix a bitset_size overflow on 32bit machines
    31Monitor
  • Later →CVE-2026-72108Aug 15, 2026 · dm thin metadata: fix metadata snapshot consistency on commit failure
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux1fcb5e29dd7a5b85adb9d8b539911741d878e829Vendor (CNA)
Linux Linux7e1822f83c5a1ee7b4a19e98edde8770a10b4c71Vendor (CNA)
Linux Linux9946a7176bd8c25ddd6e5f1799c54e572ee6bf0fVendor (CNA)
Linux Linuxa868196f03c2b19418ae3d2b69e195d668a271e5Vendor (CNA)
Linux Linuxbafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6Vendor (CNA)
Linux Linuxdb5f9b4601f0012038e5a2628aedec2f47933380Vendor (CNA)
Linux Linuxe3ffa8e492e5cdee62d916ee3e9244ccce2b73c5Vendor (CNA)
Linux Linuxfe94a0b14010a3c267ff9a2508afb4f27ff1c5bfVendor (CNA)
debian:linux6.1.180-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-720840 days apartscsi: target: Bound PR-OUT TransportID parsing to the received buffer
    39Monitor
  • CVE-2026-681605 days apartceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()
    39Monitor
  • CVE-2026-683885 days apartsmb/client: handle overlapping allocated ranges in fallocate
    39Monitor
  • CVE-2026-680827 days apartlibceph: fix two unsafe bare decodes in decode_lockers()
    39Monitor
  • CVE-2026-6391227 days apartxfrm: esp: restore combined single-frag length gate
    39Monitor
  • CVE-2026-6393827 days apartKVM: SEV: Check PSC request indices against the actual size of the buffer
    37Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

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Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records