7.8

CVE-2022-50756: linux

CVSS: 7.8v3.1HighDeferred
AliasesUBUNTU-CVE-2022-50756DEBIAN-CVE-2022-50756
Published 24-12-2025Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2022-50756 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.4% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.20%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 17 · Related 14
RHSA-2023:6583RHSA-2026:75746RHSA-2026:75747SUSE-SU-2026:0263-1SUSE-SU-2026:0317-1SUSE-SU-2026:0350-1

Timeline

  1. 24-12-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.20% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.20%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu117 products
  • linuxAll versions (No fix recorded) | < 5.15.0-69.76
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1033.37
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.4-1
Linux1 product
  • linux≥ 943e942e6266f22babee5efeb00f8f672fbff5bd, < dfb6d54893d544151e7f480bc44cfe7823f5ad23 | ≥ 943e942e6266f22babee5efeb00f8f672fbff5bd, < 9141144b37f30e3e7fa024bcfa0a13011e546ba9 | ≥ 943e942e6266f22babee5efeb00f8f672fbff5bd, < e1777b4286e526c58b4ee699344b0ad85aaf83a0 | ≥ 943e942e6266f22babee5efeb00f8f672fbff5bd, < b1814724e0d7162bdf4799f2d565381bc2251c63 | ≥ 943e942e6266f22babee5efeb00f8f672fbff5bd, < c89a529e823d51dd23c7ec0c047c7a454a428541 | 4.18

3 vendors · 119 products

References

8 links