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Vulnerability · Published Apr 22, 2026 · Assigned by Linux

CVE-2026-31493RDMA/efa: Fix use of completion ctx after free

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 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.2%top 94.4% 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: RDMA/efa: Fix use of completion ctx after free On admin queue completion handling, if the admin command completed with error we print data from the completion context. The issue is that we already freed the completion context in polling/interrupts handler which means we print data from context in an unknown state (it might be already used again). Change the admin submission flow so alloc/dealloc of the context will be symmetric and dealloc will be called after any potential use of the context.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-31493
Debian:13linux6.12.115-2DEBIAN-CVE-2026-31493
Debian:14linux6.19.11-1DEBIAN-CVE-2026-31493
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-31493
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-31493
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-31493
Ubuntu:25.10linux-azureno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-31493
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-31493
Ubuntu:25.10linux-gcpno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1035.38UBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-31493
Ubuntu:25.10linux-oracleno fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-31493
Ubuntu:25.10linux-raspino fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-31493
Ubuntu:25.10linux-realtimeno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-31493
Ubuntu:25.10linux-riscvno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-31493
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-31493
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-31493

Affected products (as reported)

VendorProductVersions
Linux Linux 68fb9f3e312a36e49fd05ec2d6b668daf2c4931a – before 8c24b5179af260a5f36571c992d29aab1f44854468fb9f3e312a36e49fd05ec2d6b668daf2c4931a – before 7ba09d85f177e9f5f64b881f33dbcb57b2cf23d568fb9f3e312a36e49fd05ec2d6b668daf2c4931a – before 0dd98aea1c0c45987fa2dd92f988b0eb1a72c12568fb9f3e312a36e49fd05ec2d6b668daf2c4931a – before 1cf95fe5dc5471efea947b4c6f8913da6bc7976e68fb9f3e312a36e49fd05ec2d6b668daf2c4931a – before ef3b06742c8a201d0e83edc9a33a89a4fe3009f8
Linux Linux 5.12

References