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CVE-2022-49421: video: fbdev: clcdfb: Fix refcount leak in clcdfb_of_vram_setup

• 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: 2025-02-26 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: video: fbdev: clcdfb: Fix refcount leak in clcdfb_of_vram_setup of_parse_phandle() returns a node pointer with refcount incremented, we should use of_node_put() on it when not need anymore. Add missing of_node_put() to avoid refcount leak.

Affected products

• Linux kernel: from 3.17 before 4.9.318; from 4.10 before 4.14.283; from 4.15 before 4.19.247; from 4.20 before 5.4.198; from 5.5 before 5.10.121; from 5.11 before 5.15.46 — fixed in 4.14.283, 4.19.247, 4.9.318, 5.10.121, 5.15.46, 5.17.14

How to fix

Upgrade to a fixed version: Linux kernel 4.14.283, 4.19.247, 4.9.318, 5.10.121. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2e2e2c71b2642289438392edbf5d08cdbc0b138b
• https://git.kernel.org/stable/c/38d245cebf545338a6bc1c7762023de3fbecd7b7
• https://git.kernel.org/stable/c/51eb1bb6baeb478538dd4ec6459fd68c44a855b1
• https://git.kernel.org/stable/c/6c92711db7c90f78e0b67ac2a8944d0fe7e12d83
• https://git.kernel.org/stable/c/8db59df7f5826e104db82cfddbf22a33a151193e
• https://git.kernel.org/stable/c/b23789a59fa6f00e98a319291819f91fbba0deb8
• https://git.kernel.org/stable/c/bbb2a24e863b6a10129546a0a4ceea2f07deec39
• https://git.kernel.org/stable/c/c1c4405222b6fc98c16e8c2aa679c14e41d81465
• https://git.kernel.org/stable/c/f2dfb4ab887d67be7d0892ba041d3c8d738d3356

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