CVE-2022-50756

nvme-pci: fix mempool alloc size

State: Published
Severity: 7.8 High
Published: Dec 24, 2025
Updated: Oct 15, 2026
Reserved: Dec 24, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	943e942e6266f22babee5efeb00f8f672fbff5bd to before dfb6d54893d544151e7f480bc44cfe7823f5ad23Affected 943e942e6266f22babee5efeb00f8f672fbff5bd to before 9141144b37f30e3e7fa024bcfa0a13011e546ba9Affected 943e942e6266f22babee5efeb00f8f672fbff5bd to before e1777b4286e526c58b4ee699344b0ad85aaf83a0Affected 943e942e6266f22babee5efeb00f8f672fbff5bd to before b1814724e0d7162bdf4799f2d565381bc2251c63Affected 943e942e6266f22babee5efeb00f8f672fbff5bd to before c89a529e823d51dd23c7ec0c047c7a454a428541Affected
LinuxLinux	4.18Affected before 4.18Not affected 5.10.163 through 5.10.Not affected 5.15.87 through 5.15.Not affected 6.0.17 through 6.0.Not affected 6.1.3 through 6.1.Not affected 6.2 and laterNot affected

Product

Versions

LinuxLinux

943e942e6266f22babee5efeb00f8f672fbff5bd to before dfb6d54893d544151e7f480bc44cfe7823f5ad23Affected
943e942e6266f22babee5efeb00f8f672fbff5bd to before 9141144b37f30e3e7fa024bcfa0a13011e546ba9Affected
943e942e6266f22babee5efeb00f8f672fbff5bd to before e1777b4286e526c58b4ee699344b0ad85aaf83a0Affected
943e942e6266f22babee5efeb00f8f672fbff5bd to before b1814724e0d7162bdf4799f2d565381bc2251c63Affected
943e942e6266f22babee5efeb00f8f672fbff5bd to before c89a529e823d51dd23c7ec0c047c7a454a428541Affected

LinuxLinux

4.18Affected
before 4.18Not affected
5.10.163 through 5.10.*Not affected
5.15.87 through 5.15.*Not affected
6.0.17 through 6.0.*Not affected
6.1.3 through 6.1.*Not affected
6.2 and laterNot affected

References

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