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NVD / CVE Program· CNA Linux

CVE-2026-43064: dmaengine: idxd: Fix not releasing workqueue on .release()

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.11% (FIRST EPSS).
  • Someone with local access to the system 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 2bb9e9e93adff9cc8a138ae9a3a8d59b3452272e, 3d33de353b1ff9023d5ec73b9becf80ea87af695, 5.12.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 2bb9e9e93adff9cc8a138ae9a3a8d59b3452272e, 3d33de353b1ff9023d5ec73b9becf80ea87af695, 5.12 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: dmaengine: idxd: Fix not releasing workqueue on .release() The workqueue associated with an DSA/IAA device is not released when the object is freed.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 5, 2026
Updated
Jun 19, 2026
EPSS
0.1% · 1th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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-2026-43064

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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.11.22 and later · before 5.12
  • linux linux kernel5.12.5 and later · before 5.13
  • linux linux kernel5.13 and later · before 6.1.168
  • linux linux kernel6.2 and later · before 6.6.131
  • linux linux kernel6.7 and later · before 6.12.80
  • linux linux kernel6.13 and later · before 6.18.21
  • linux linux kernel6.19 and later · before 6.19.11
  • linux linux kernel7.0

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

    • 3f0e87eb9680975184e98aed0e8866b4442a31f6, a13e4cf29da68630a116c1309072a265ade9566d, 5.13affected
    • 47c16ac27d4cb664cee53ee0b9b7e2f907923fb3 and later · before 70ae35be58d476e2fd9f7a941a5e03b2f5fadb8daffected · git
    • 47c16ac27d4cb664cee53ee0b9b7e2f907923fb3 and later · before b22fd53b2ceb35445475f0edab13a908c5fb8433affected · git
    • 47c16ac27d4cb664cee53ee0b9b7e2f907923fb3 and later · before 2bb9e9e93adff9cc8a138ae9a3a8d59b3452272eaffected · git
    • 47c16ac27d4cb664cee53ee0b9b7e2f907923fb3 and later · before d02c24af126dee45247dc7890409c86d1831859daffected · git
    • 47c16ac27d4cb664cee53ee0b9b7e2f907923fb3 and later · before 958e96533ddbd1edd127feb7624a7eed0cc379dcaffected · git
    • 47c16ac27d4cb664cee53ee0b9b7e2f907923fb3 and later · before fc34f199eb576b3a73089452fdf0056cc9a9301daffected · git
    • 47c16ac27d4cb664cee53ee0b9b7e2f907923fb3 and later · before 3d33de353b1ff9023d5ec73b9becf80ea87af695affected · git
    • 5.11.22 and later · before 5.12affected · semver
    • 5.12.5 and later · before 5.13affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.176-16.1.176-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.11-16.19.11-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-43058May 2, 2026 · media: vidtv: fix pass-by-value structs causing MSAN warnings
    22Monitor
  • ← EarlierCVE-2026-43061May 5, 2026 · serial: 8250: Fix TX deadlock when using DMA
    22Monitor
  • Later →CVE-2026-43065May 5, 2026 · ext4: always drain queued discard work in ext4_mb_release()
    22Monitor

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 Linux2bb9e9e93adff9cc8a138ae9a3a8d59b3452272eVendor (CNA)
Linux Linux3d33de353b1ff9023d5ec73b9becf80ea87af695Vendor (CNA)
Linux Linux5.12Vendor (CNA)
Linux Linux5.13Vendor (CNA)
Linux Linux70ae35be58d476e2fd9f7a941a5e03b2f5fadb8dVendor (CNA)
Linux Linux958e96533ddbd1edd127feb7624a7eed0cc379dcVendor (CNA)
Linux Linuxb22fd53b2ceb35445475f0edab13a908c5fb8433Vendor (CNA)
Linux Linuxd02c24af126dee45247dc7890409c86d1831859dVendor (CNA)
Linux Linuxfc34f199eb576b3a73089452fdf0056cc9a9301dVendor (CNA)
debian:linux6.1.176-1 · 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.

No history yet (it accumulates with the daily EPSS job).

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system 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
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

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✗ → ✓

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

References

Show all references (6 more)

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

All records