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CVE-2022-49982: media: pvrusb2: fix memory leak in pvr_probe

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-18 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: media: pvrusb2: fix memory leak in pvr_probe The error handling code in pvr2_hdw_create forgets to unregister the v4l2 device. When pvr2_hdw_create returns back to pvr2_context_create, it calls pvr2_context_destroy to destroy context, but mp->hdw is NULL, which leads to that pvr2_hdw_destroy directly returns. Fix this by adding v4l2_device_unregister to decrease the refcount of usb interface.

Affected products

• Linux kernel: before 4.9.327; from 4.10 before 4.14.292; from 4.15 before 4.19.257; from 4.20 before 5.4.212; from 5.5 before 5.10.141; from 5.11 before 5.15.65 — fixed in 4.14.292, 4.19.257, 4.9.327, 5.10.141, 5.15.65, 5.19.7

How to fix

Upgrade to a fixed version: Linux kernel 4.14.292, 4.19.257, 4.9.327, 5.10.141. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2fe46195d2f0d5d09ea65433aefe47a4d0d0ff4d
• https://git.kernel.org/stable/c/466b67c0543b2ae67814d053f6e29b39be6b33bb
• https://git.kernel.org/stable/c/491762b3250fb06a0c97b5198656ea48359eaeed
• https://git.kernel.org/stable/c/945a9a8e448b65bec055d37eba58f711b39f66f0
• https://git.kernel.org/stable/c/ba7dd8a9686a61a34b3a7b922ce721378d4740d0
• https://git.kernel.org/stable/c/bacb37bdc2a21c8f7fdc83dcc0dea2f4ca1341fb
• https://git.kernel.org/stable/c/c02d2a91a85c4c4d05826cd1ea74a9b8d42e4280
• https://git.kernel.org/stable/c/f2f6e67522916f53ad8ccd4dbe68dcf76e9776e5

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