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Vulnerability · Published Dec 24, 2025 · Assigned by Linux

CVE-2022-50756nvme-pci: fix mempool alloc size

High 7.8

In plain English

A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 89.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-abi-stablelists4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-core4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-cross-headers4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-debug4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-debug-core4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-debug-devel4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-debug-modules4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-devel4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-doc4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-headers4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-modules4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-modules-extra4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-rt4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-core4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-debug4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-debug-core4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-devel4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-modules4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.171.1.rt7.512.el8_10ALSA-2026:75746
AlmaLinux:8kernel-tools4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-tools-libs4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-zfcpdump4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8perf4.18.0-553.171.1.el8_10ALSA-2026:75747
AlmaLinux:8python3-perf4.18.0-553.171.1.el8_10ALSA-2026:75747
Debian:12linux6.1.4-1DEBIAN-CVE-2022-50756
Debian:13linux6.1.4-1DEBIAN-CVE-2022-50756
Debian:14linux6.1.4-1DEBIAN-CVE-2022-50756
Rocky Linux:8kernel0:4.18.0-553.171.1.el8_10RLSA-2026:75747
Rocky Linux:8kernel-rt0:4.18.0-553.171.1.rt7.512.el8_10RLSA-2026:75746
Ubuntu:22.04:LTSlinux5.15.0-69.76UBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-aws5.15.0-1033.37UBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-azure5.15.0-1035.42UBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2022-50756
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1035.42.1UBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-gcp5.15.0-1031.38UBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2022-50756
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-gke5.15.0-1030.35UBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1017.22UBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2022-50756
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-ibm5.15.0-1027.30UBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1027.32UBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-kvm5.15.0-1030.35UBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-69.76UBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2022-50756
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1023.23UBUNTU-CVE-2022-50756
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2022-50756
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2022-50756
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-oracle5.15.0-1032.38UBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-raspi5.15.0-1026.28UBUNTU-CVE-2022-50756
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-50756
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-50756
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2022-50756
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2022-50756
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2022-50756

Affected products (as reported)

VendorProductVersions
Linux Linux 943e942e6266f22babee5efeb00f8f672fbff5bd – before dfb6d54893d544151e7f480bc44cfe7823f5ad23943e942e6266f22babee5efeb00f8f672fbff5bd – before 9141144b37f30e3e7fa024bcfa0a13011e546ba9943e942e6266f22babee5efeb00f8f672fbff5bd – before e1777b4286e526c58b4ee699344b0ad85aaf83a0943e942e6266f22babee5efeb00f8f672fbff5bd – before b1814724e0d7162bdf4799f2d565381bc2251c63943e942e6266f22babee5efeb00f8f672fbff5bd – before c89a529e823d51dd23c7ec0c047c7a454a428541
Linux Linux 4.18

References