CVE-2026-43223

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.

CVSS v3.1 Score

5.5

MEDIUM

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

EPSS — Exploit Prediction

0.0001

Probability of exploitation

0.02%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-401 CWE-401

Affected Products

Vendor	Product	Versions
linux	linux_kernel	2.6.18 — 5.10.252
linux	linux_kernel	5.11 — 5.15.202
linux	linux_kernel	5.16 — 6.1.165
linux	linux_kernel	6.2 — 6.6.128
linux	linux_kernel	6.7 — 6.12.75
linux	linux_kernel	6.13 — 6.18.16
linux	linux_kernel	6.19 — 6.19.6

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2026-43223? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-43223? +

CVE-2026-43223 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0001, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-43223? +

CVE-2026-43223 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-43223? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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