CVE-2022-50756
Published Dec 24, 2025
Modified Apr 15, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: nvme-pci: fix mempool alloc size Convert the max size to bytes to match the units of the divisor that calculates the worst-case number of PRP entries. The result is used to determine how many PRP Lists are required. The code was previously rounding this to 1 list, but we can require 2 in the worst case. In that scenario, the driver would corrupt memory beyond the size provided by the mempool. While unlikely to occur (you'd need a 4MB in exactly 127 phys segments on a queue that doesn't support SGLs), this memory corruption has been observed by kfence.
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References
Other References
https://git.kernel.org/stable/c/9141144b37f30e3e7fa024bcfa0a13011e546ba9
https://git.kernel.org/stable/c/b1814724e0d7162bdf4799f2d565381bc2251c63
https://git.kernel.org/stable/c/c89a529e823d51dd23c7ec0c047c7a454a428541
https://git.kernel.org/stable/c/dfb6d54893d544151e7f480bc44cfe7823f5ad23
https://git.kernel.org/stable/c/e1777b4286e526c58b4ee699344b0ad85aaf83a0
Frequently Asked Questions
What is CVE-2022-50756? +
In the Linux kernel, the following vulnerability has been resolved:
nvme-pci: fix mempool alloc size
Convert the max size to bytes to match the units of the divisor that
calculates the worst-case number of PRP entries.
The result is used to determine how many PRP Lists are required. The
code was previously rounding this to 1 list, but we can require 2 in the
worst case. In that scenario, the driver would corrupt memory beyond the
size provided by the mempool.
While unlikely to occur (you'd need a 4MB in exactly 127 phys segments
on a queue that doesn't support SGLs), this memory corruption has been
observed by kfence.
How do I check if I'm vulnerable to CVE-2022-50756? +
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.