What’s Vulnerable › Vulnerabilities

CVE-2022-50353: mmc: wmt-sdmmc: fix return value check of mmc_add_host()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-17 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: mmc: wmt-sdmmc: fix return value check of mmc_add_host() mmc_add_host() may return error, if we ignore its return value, the memory that allocated in mmc_alloc_host() will be leaked and it will lead a kernel crash because of deleting not added device in the remove path. So fix this by checking the return value and goto error path which will call mmc_free_host(), besides, clk_disable_unprepare() also needs be called.

Affected products

• Linux kernel: from 3.8 before 4.14.303; from 4.15 before 4.19.270; from 4.20 before 5.4.229; from 5.5 before 5.10.163; from 5.11 before 5.15.86; from 5.16 before 6.0.16 — fixed in 4.14.303, 4.19.270, 5.10.163, 5.15.86, 5.4.229, 6.0.16

How to fix

Upgrade to a fixed version: Linux kernel 4.14.303, 4.19.270, 5.10.163, 5.15.86. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/29276d56f6ed138db0f38cd31aedc0b725c8c76c
• https://git.kernel.org/stable/c/58c3a8d0f1abeb1ca5c2df948be58ad4f7bb6f67
• https://git.kernel.org/stable/c/70b0620afab3c69d95a7e2dd7ceff162a21c4009
• https://git.kernel.org/stable/c/9bedf64dda84b29151e41591d8ded9ff0e6d336a
• https://git.kernel.org/stable/c/b40ac3b696a9c84b36211ef0c3f5a422650c101b
• https://git.kernel.org/stable/c/c7a328cea791cc2769b6417943939420913b4a46
• https://git.kernel.org/stable/c/eb7a2d516d4fbd165c07877a20feccb047342b1f
• https://git.kernel.org/stable/c/ecd6f77af3478f5223aa4011642a891b7dc91228

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