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NVD / CVE Program· CNA Linux

CVE-2026-97440: net: qrtr: fix node refcount leak on ctrl packet alloc failure

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: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 3b09ff54114566864eea59020f6b69c5bb325b9d, 477353db343663d5502ca442c6de785d2f23f273, 78d066ecac9ce50441d4affae0df2093c4c3e62e; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1.

Low priority for now. Upgrade to Linux Linux 3b09ff54114566864eea59020f6b69c5bb325b9d, 477353db343663d5502ca442c6de785d2f23f273, 78d066ecac9ce50441d4affae0df2093c4c3e62e; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1 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: net: qrtr: fix node refcount leak on ctrl packet alloc failure qrtr_send_resume_tx() calls qrtr_node_lookup() which takes a reference on the returned node. If the subsequent call to qrtr_alloc_ctrl_packet() fails due to memory allocation failure, the function returns -ENOMEM without calling qrtr_node_release() to release the node reference. Add qrtr_node_release(node) before returning on the allocation failure path to properly release the reference.

—No exploit Fix available
Published
Sep 24, 2026
Updated
Oct 3, 2026
EPSS
0.1% · 6th 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 · 0.1%

Get told when this record changes

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  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
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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

    • 5.6affected
    • cb6530b99fafea6c0636c4640bd21301d12cdbc9 and later · before 78d066ecac9ce50441d4affae0df2093c4c3e62eaffected · git
    • cb6530b99fafea6c0636c4640bd21301d12cdbc9 and later · before f3e90fbcd2d5ec1632bc2e8cdd1218f56bcb5fcfaffected · git
    • cb6530b99fafea6c0636c4640bd21301d12cdbc9 and later · before c3515740174b778d0ee44acc477b51a6478da6b8affected · git
    • cb6530b99fafea6c0636c4640bd21301d12cdbc9 and later · before f76a39c45182d9137e053081cee9f2c197404ce6affected · git
    • cb6530b99fafea6c0636c4640bd21301d12cdbc9 and later · before 477353db343663d5502ca442c6de785d2f23f273affected · git
    • cb6530b99fafea6c0636c4640bd21301d12cdbc9 and later · before 9d969c98732a4d42212ec580dd5bbad53f246103affected · git
    • cb6530b99fafea6c0636c4640bd21301d12cdbc9 and later · before 3b09ff54114566864eea59020f6b69c5bb325b9daffected · git
    • before 5.6not affected · semver
    • 5.10.271 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

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-2026-97438Sep 24, 2026 · fs/ntfs3: validate index entry key bounds
    28Monitor
  • ← EarlierCVE-2026-97439Sep 24, 2026 · fs/ntfs3: preserve non-DOS attribute bits in system.dos_attrib
    0Monitor
  • Later →CVE-2026-97441Sep 24, 2026 · ata: ahci: fail probe if BAR too small for claimed ports
    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 Linux3b09ff54114566864eea59020f6b69c5bb325b9dVendor (CNA)
Linux Linux477353db343663d5502ca442c6de785d2f23f273Vendor (CNA)
Linux Linux78d066ecac9ce50441d4affae0df2093c4c3e62eVendor (CNA)
Linux Linux9d969c98732a4d42212ec580dd5bbad53f246103Vendor (CNA)
Linux Linuxc3515740174b778d0ee44acc477b51a6478da6b8Vendor (CNA)
Linux Linuxf3e90fbcd2d5ec1632bc2e8cdd1218f56bcb5fcfVendor (CNA)
Linux Linuxf76a39c45182d9137e053081cee9f2c197404ce6Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.158.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · 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. Fix✗ → ✓

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References

Show all references (6 more)

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

All records