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NVD / CVE Program· CNA Linux

CVE-2026-43223: media: pvrusb2: fix URB leak in pvr2_send_request_ex

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: 0.12% (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 2011929f0e4cf6a0a34dd6205911b12276904453, 4ba5c7a1aade7090172cbffd4d120bf4cf5ccbde, 58dd722b6c3debcddb4684fb256c90fee7f063e5.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 2011929f0e4cf6a0a34dd6205911b12276904453, 4ba5c7a1aade7090172cbffd4d120bf4cf5ccbde, 58dd722b6c3debcddb4684fb256c90fee7f063e5 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: media: pvrusb2: fix URB leak in pvr2_send_request_ex When pvr2_send_request_ex() submits a write URB successfully but fails to submit the read URB (e.g. returns -ENOMEM), it returns immediately without waiting for the write URB to complete. Since the driver reuses the same URB structure, a subsequent call to pvr2_send_request_ex() attempts to submit the still-active write URB, triggering a 'URB submitted while active' warning in usb_submit_urb(). Fix this by ensuring the write URB is unlinked and waited upon if the read URB submission fails.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 6, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 2th percentile

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%

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.

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When you'll hear from us

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  • 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 kernel2.6.18 and later · before 5.10.252
  • linux linux kernel5.11 and later · before 5.15.202
  • linux linux kernel5.16 and later · before 6.1.165
  • linux linux kernel6.2 and later · before 6.6.128
  • linux linux kernel6.7 and later · before 6.12.75
  • linux linux kernel6.13 and later · before 6.18.16
  • linux linux kernel6.19 and later · before 6.19.6

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

    • 2.6.18affected
    • d855497edbfbf9e19a17f4a1154bca69cb4bd9ba and later · before da524c939b1e5ba17f10db4bde4bdaf569ffcda6affected · git
    • d855497edbfbf9e19a17f4a1154bca69cb4bd9ba and later · before cf459d6ffa5e150ef3744b897f936ff24b52bd15affected · git
    • d855497edbfbf9e19a17f4a1154bca69cb4bd9ba and later · before 77a63f8efc434ddb04667ed632aade58301a2f13affected · git
    • d855497edbfbf9e19a17f4a1154bca69cb4bd9ba and later · before 4ba5c7a1aade7090172cbffd4d120bf4cf5ccbdeaffected · git
    • d855497edbfbf9e19a17f4a1154bca69cb4bd9ba and later · before 58dd722b6c3debcddb4684fb256c90fee7f063e5affected · git
    • d855497edbfbf9e19a17f4a1154bca69cb4bd9ba and later · before 2011929f0e4cf6a0a34dd6205911b12276904453affected · git
    • d855497edbfbf9e19a17f4a1154bca69cb4bd9ba and later · before 5f3ac816861c3b8a5d1a3645b17dc3a99d668d94affected · git
    • d855497edbfbf9e19a17f4a1154bca69cb4bd9ba and later · before a8333c8262aed2aedf608c18edd39cf5342680a7affected · git
    • before 2.6.18not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.6-16.19.6-1

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-2026-43216May 6, 2026 · net: Drop the lock in skb_may_tx_timestamp()
    22Monitor
  • ← EarlierCVE-2026-43220May 6, 2026 · iommu/amd: serialize sequence allocation under concurrent TLB invalidations
    22Monitor
  • Later →CVE-2026-43228May 6, 2026 · hfs: Replace BUG_ON with error handling for CNID count checks
    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 Linux2011929f0e4cf6a0a34dd6205911b12276904453Vendor (CNA)
Linux Linux4ba5c7a1aade7090172cbffd4d120bf4cf5ccbdeVendor (CNA)
Linux Linux58dd722b6c3debcddb4684fb256c90fee7f063e5Vendor (CNA)
Linux Linux5f3ac816861c3b8a5d1a3645b17dc3a99d668d94Vendor (CNA)
Linux Linux77a63f8efc434ddb04667ed632aade58301a2f13Vendor (CNA)
Linux Linuxa8333c8262aed2aedf608c18edd39cf5342680a7Vendor (CNA)
Linux Linuxcf459d6ffa5e150ef3744b897f936ff24b52bd15Vendor (CNA)
Linux Linuxda524c939b1e5ba17f10db4bde4bdaf569ffcda6Vendor (CNA)
debian:linux6.1.170-1 · 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)

CWE-401 · Missing Release of Memory after Effective Lifetime

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. 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