HOMEVULNERABILITIESCVE-2026-43223
MEDIUM

CVE-2026-43223

Published: May 6, 2026· Updated: May 8, 2026

5.5
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:7.0th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-43223 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Linux1 product
linux kernel
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://git.kernel.org/stable/c/2011929f0e4cf6a0a34dd6205911b12276904453
PATCHhttps://git.kernel.org/stable/c/4ba5c7a1aade7090172cbffd4d120bf4cf5ccbde
PATCHhttps://git.kernel.org/stable/c/58dd722b6c3debcddb4684fb256c90fee7f063e5
PATCHhttps://git.kernel.org/stable/c/5f3ac816861c3b8a5d1a3645b17dc3a99d668d94
PATCHhttps://git.kernel.org/stable/c/77a63f8efc434ddb04667ed632aade58301a2f13
PATCHhttps://git.kernel.org/stable/c/a8333c8262aed2aedf608c18edd39cf5342680a7
PATCHhttps://git.kernel.org/stable/c/cf459d6ffa5e150ef3744b897f936ff24b52bd15
PATCHhttps://git.kernel.org/stable/c/da524c939b1e5ba17f10db4bde4bdaf569ffcda6

All References (8)

→
https://git.kernel.org/stable/c/2011929f0e4cf6a0a34dd6205911b12276904453Patch
→
https://git.kernel.org/stable/c/4ba5c7a1aade7090172cbffd4d120bf4cf5ccbdePatch
→
https://git.kernel.org/stable/c/58dd722b6c3debcddb4684fb256c90fee7f063e5Patch
→
https://git.kernel.org/stable/c/5f3ac816861c3b8a5d1a3645b17dc3a99d668d94Patch
→
https://git.kernel.org/stable/c/77a63f8efc434ddb04667ed632aade58301a2f13Patch
→
https://git.kernel.org/stable/c/a8333c8262aed2aedf608c18edd39cf5342680a7Patch
→
https://git.kernel.org/stable/c/cf459d6ffa5e150ef3744b897f936ff24b52bd15Patch
→
https://git.kernel.org/stable/c/da524c939b1e5ba17f10db4bde4bdaf569ffcda6Patch

Quick Facts

CVE IDCVE-2026-43223
CVSS Score5.5 / 10
SeverityMEDIUM
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedMay 6, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-43223 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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