What’s Vulnerable › Vulnerabilities

CVE-2022-50886: mmc: toshsd: fix return value check of mmc_add_host()

• Severity: unknown
• 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: 2025-12-30 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: mmc: toshsd: 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, free_irq() also needs be called.

Affected products

• Linux kernel: 3.19 — fixed in 6.2

How to fix

Upgrade to a fixed version: Linux kernel 6.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3329e7b7132ca727263fb0ee214cf52cc6dcaaad
• https://git.kernel.org/stable/c/34ae492f8d172f0bd193c24cad588b35419ea47a
• https://git.kernel.org/stable/c/3dbb69a0242c31ea4c9eee22b1c41b515fe509a0
• https://git.kernel.org/stable/c/4f6cb1c685f9e20a4a9fa565e442f5af4dad70ff
• https://git.kernel.org/stable/c/6444079767b68b1fbed0e7668081146e80dcb719
• https://git.kernel.org/stable/c/647e370dd0ef7e212d8d014bda748e461eab2e8c
• https://git.kernel.org/stable/c/aabbedcb6c9a72d12d35dc672e83f0c8064d8a61
• https://git.kernel.org/stable/c/bfd77b194c94aefbde4efc30ddf8607dd9244672
• https://git.kernel.org/stable/c/f670744a316ea983113a65313dcd387b5a992444

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