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Vulnerability · Published Sep 24, 2026 · Assigned by Linux

CVE-2026-97421RDMA/umem: Be careful about boundary conditions in ib_umem_find_best_pgsz()

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 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 97.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: RDMA/umem: Be careful about boundary conditions in ib_umem_find_best_pgsz() Several corner cases, especially important on 32 bits: - umem->iova is u64, the function argument should pass in u64 or iova will be truncated - Check that the length is not too large for the iova - Check that lengths > 4G don't overflow the GENMASK

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.190-1DEBIAN-CVE-2026-97421
Debian:13linux6.12.111-1DEBIAN-CVE-2026-97421
Debian:14linux7.2.6-1DEBIAN-CVE-2026-97421
Debian:12linux-6.126.12.111-1~deb12u1DEBIAN-CVE-2026-97421
Ubuntu:22.04:LTSlinux5.15.0-202.212UBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-97421
Ubuntu:26.04:LTSlinux7.0.0-42.42UBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-aws5.15.0-1119.126UBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-97421
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17UBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-azure5.15.0-1125.134UBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-97421
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1124.133UBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-97421
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-gcp5.15.0-1120.130UBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-97421
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18UBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-gke5.15.0-1115.121UBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-97421
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1102.110UBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1UBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-ibm5.15.0-1113.117UBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-97421
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17UBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1114.120UBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-kvm5.15.0-1111.116UBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-197.207UBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1114.115UBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-97421
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-97421
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1070.72UBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1059.59UBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-97421
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1017.17UBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-oracle5.15.0-1116.122UBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-97421
Ubuntu:26.04:LTSlinux-oracle7.0.0-1015.16UBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-97421
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-97421
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-97421
Ubuntu:26.04:LTSlinux-riscv7.0.0-42.42.1UBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-42.42.1~24.04.1UBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-97421
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-97421
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-97421

Affected products (as reported)

VendorProductVersions
Linux Linux a40c20dabdf9045270767c75918feb67f0727c89 – before 3014da7587ce006cd08004fd6b257626b314e0a3a40c20dabdf9045270767c75918feb67f0727c89 – before ddccf6cc3861de2fe60986933bead79220e0d797a40c20dabdf9045270767c75918feb67f0727c89 – before e9bbb5f5349ef560ff6f0395564f04c3aa664559a40c20dabdf9045270767c75918feb67f0727c89 – before ae3cf7d2c4d506c5c91746321644e1a08d989e2aa40c20dabdf9045270767c75918feb67f0727c89 – before 5fc5b73109540809b094710fac44da81dd8a3ff8a40c20dabdf9045270767c75918feb67f0727c89 – before 09ea6837a0434fb4db99528a5055b6d822135dcf85e40ba1c4a5246b35e91c2ed69d4680426904d759f07434b297e2268f5d5c567db5b09145245cf1
Linux Linux 5.10

References