CVE-2022-50756 (GCVE-0-2022-50756)

Vulnerability from cvelistv5 – Published: 2025-12-24 13:05 – Updated: 2026-10-15 21:41
VLAI
Title
nvme-pci: fix mempool alloc size
Summary
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 21:32 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 943e942e6266f22babee5efeb00f8f672fbff5bd , < dfb6d54893d544151e7f480bc44cfe7823f5ad23 (git)
Affected: 943e942e6266f22babee5efeb00f8f672fbff5bd , < 9141144b37f30e3e7fa024bcfa0a13011e546ba9 (git)
Affected: 943e942e6266f22babee5efeb00f8f672fbff5bd , < e1777b4286e526c58b4ee699344b0ad85aaf83a0 (git)
Affected: 943e942e6266f22babee5efeb00f8f672fbff5bd , < b1814724e0d7162bdf4799f2d565381bc2251c63 (git)
Affected: 943e942e6266f22babee5efeb00f8f672fbff5bd , < c89a529e823d51dd23c7ec0c047c7a454a428541 (git)
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Linux Linux Affected: 4.18
Unaffected: 0 , < 4.18 (semver)
Unaffected: 5.10.163 , ≤ 5.10.* (semver)
Unaffected: 5.15.87 , ≤ 5.15.* (semver)
Unaffected: 6.0.17 , ≤ 6.0.* (semver)
Unaffected: 6.1.3 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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}



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