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NVD / CVE Program· CNA Linux

CVE-2026-72223: nvdimm/btt: Free arena sub-allocations on discover_arenas() error path

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.22% (FIRST EPSS).
  • Fixed version: Linux Linux 0b0d9404951aacc9717aa61e77af4a6e9e8f8249, 13fe4cd9ddd0aacb7777812328be525a11ea3fea, 2d0364937550a7b3e2592629c2a68753ac020b28.

Low priority for now. Upgrade to Linux Linux 0b0d9404951aacc9717aa61e77af4a6e9e8f8249, 13fe4cd9ddd0aacb7777812328be525a11ea3fea, 2d0364937550a7b3e2592629c2a68753ac020b28 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: nvdimm/btt: Free arena sub-allocations on discover_arenas() error path Memory allocated by btt_freelist_init(), btt_rtt_init(), and btt_maplocks_init() is not freed on some discover_arenas() error paths. This leaks memory when arena discovery fails. Add the missing kfree() calls to release the allocations before returning an error. [ as: commit message and log edits ]

—No exploit Fix available
Published
Aug 15, 2026
Updated
Nov 6, 2026
EPSS
0.2% · 12th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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-2026-72223

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

    • 4.2affected
    • 5212e11fde4d40fa627668b4f2222d20db488f71 and later · before 2d0364937550a7b3e2592629c2a68753ac020b28affected · git
    • 5212e11fde4d40fa627668b4f2222d20db488f71 and later · before eeb95774bc79268e2b78ebf01d8781560b5bd671affected · git
    • 5212e11fde4d40fa627668b4f2222d20db488f71 and later · before 7563f69caa9143a491d5f26e563255c734751545affected · git
    • 5212e11fde4d40fa627668b4f2222d20db488f71 and later · before 0b0d9404951aacc9717aa61e77af4a6e9e8f8249affected · git
    • 5212e11fde4d40fa627668b4f2222d20db488f71 and later · before 873ced7f345e99f7ee16f9ff226515580332ecc4affected · git
    • 5212e11fde4d40fa627668b4f2222d20db488f71 and later · before 30d490bb2c4cd220e7dedf862ab6a09eb5dcbad5affected · git
    • 5212e11fde4d40fa627668b4f2222d20db488f71 and later · before ba59b96d8d21dc8729fca44a022ca5919c1848c9affected · git
    • 5212e11fde4d40fa627668b4f2222d20db488f71 and later · before 13fe4cd9ddd0aacb7777812328be525a11ea3feaaffected · git
    • before 4.2not 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-2026-72221Aug 15, 2026 · sunrpc: wait for in-flight TLS handshake callback when cancel loses race
    39Monitor
  • ← EarlierCVE-2026-72222Aug 15, 2026 · sunrpc: pin svc_xprt across the asynchronous TLS handshake callback
    39Monitor
  • Later →CVE-2026-72224Aug 15, 2026 · nvdimm/btt: Free arenas on btt_init() error paths
    0Monitor

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 Linux0b0d9404951aacc9717aa61e77af4a6e9e8f8249Vendor (CNA)
Linux Linux13fe4cd9ddd0aacb7777812328be525a11ea3feaVendor (CNA)
Linux Linux2d0364937550a7b3e2592629c2a68753ac020b28Vendor (CNA)
Linux Linux30d490bb2c4cd220e7dedf862ab6a09eb5dcbad5Vendor (CNA)
Linux Linux7563f69caa9143a491d5f26e563255c734751545Vendor (CNA)
Linux Linux873ced7f345e99f7ee16f9ff226515580332ecc4Vendor (CNA)
Linux Linuxba59b96d8d21dc8729fca44a022ca5919c1848c9Vendor (CNA)
Linux Linuxeeb95774bc79268e2b78ebf01d8781560b5bd671Vendor (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.

No nightly-computed relations.

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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

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