CVE-2022-50756
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.
How to fix
- Linux Linuxdfb6d54893d544151e7f480bc44cfe7823f5ad23, 9141144b37f30e3e7fa024bcfa0a13011e546ba9, e1777b4286e526c58b4ee699344b0ad85aaf83a0, b1814724e0d7162bdf4799f2d565381bc2251c63, c89a529e823d51dd23c7ec0c047c7a454a428541 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 943e942e6266f22babee5efeb00f8f672fbff5bd ≤ v < dfb6d54893d544151e7f480bc44cfe7823f5ad23, 943e942e6266f22babee5efeb00f8f672fbff5bd ≤ v < 9141144b37f30e3e7fa024bcfa0a13011e546ba9, 943e942e6266f22babee5efeb00f8f672fbff5bd ≤ v < e1777b4286e526c58b4ee699344b0ad85aaf83a0, 943e942e6266f22babee5efeb00f8f672fbff5bd ≤ v < b1814724e0d7162bdf4799f2d565381bc2251c63, 943e942e6266f22babee5efeb00f8f672fbff5bd ≤ v < c89a529e823d51dd23c7ec0c047c7a454a428541, 4.18 | dfb6d54893d544151e7f480bc44cfe7823f5ad23, 9141144b37f30e3e7fa024bcfa0a13011e546ba9, e1777b4286e526c58b4ee699344b0ad85aaf83a0, b1814724e0d7162bdf4799f2d565381bc2251c63, c89a529e823d51dd23c7ec0c047c7a454a428541 |
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