Log in Start free

Vulnerability · Published Sep 17, 2026 · Assigned by Linux

CVE-2026-90416RDMA/mlx5: Fix stack out-of-bounds read in cc_params debugfs

Unrated

In plain English

A 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 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 87.8% 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/mlx5: Fix stack out-of-bounds read in cc_params debugfs get_param() reads a congestion parameter as a u32 but formats it with the signed "%d" into an 11-byte stack buffer. A value with bit 31 set, such as 0x80000000, renders as "-2147483648\n" whose full length is 12. snprintf() stores only 11 bytes yet returns 12, so simple_read_from_buffer() treats 12 bytes as valid and reads one byte past lbuf[]. Size the buffer for the widest unsigned decimal, format with "%u" to match the u32, and use scnprintf() so the length passed to simple_read_from_buffer() reflects the bytes actually stored.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.190-1DEBIAN-CVE-2026-90416
Debian:13linux6.12.111-1DEBIAN-CVE-2026-90416
Debian:14linux7.2.6-1DEBIAN-CVE-2026-90416
Debian:12linux-6.126.12.111-1~deb12u1DEBIAN-CVE-2026-90416
Ubuntu:22.04:LTSlinux5.15.0-202.212UBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-90416
Ubuntu:26.04:LTSlinux7.0.0-42.42UBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-aws5.15.0-1119.126UBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-90416
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17UBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-azure5.15.0-1125.134UBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-90416
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1124.133UBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-90416
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-gcp5.15.0-1120.130UBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-90416
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18UBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-gke5.15.0-1115.121UBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-90416
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1102.110UBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1UBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-ibm5.15.0-1113.117UBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-90416
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17UBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1114.120UBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-kvm5.15.0-1111.116UBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-197.207UBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1114.115UBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-90416
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-90416
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1070.72UBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1059.59UBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-90416
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1017.17UBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-oracle5.15.0-1116.122UBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-90416
Ubuntu:26.04:LTSlinux-oracle7.0.0-1015.16UBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-90416
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-90416
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-90416
Ubuntu:26.04:LTSlinux-riscv7.0.0-42.42.1UBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-42.42.1~24.04.1UBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-90416
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-90416
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-90416

Affected products (as reported)

VendorProductVersions
Linux Linux 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 – before 1c5b4f76cd73372c5a8a4c91c95d5a31f141e0914a2da0b8c0782816f3ae6846ae7942fcbb0f8172 – before 06b62758f81e27ca4c81201c22e3436c6d9ac8944a2da0b8c0782816f3ae6846ae7942fcbb0f8172 – before d809cf3f0ed9255abfc73c4730bcf187151422af4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 – before 0b0122fcc923a0271130f5fb71af2cd7e20434d94a2da0b8c0782816f3ae6846ae7942fcbb0f8172 – before ce8dfd32a33b578c3abf178f67b4c8d36854f0414a2da0b8c0782816f3ae6846ae7942fcbb0f8172 – before 4599311e78e88c893ad551aca622de2bfdf1c31f4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 – before c75ee076fa09778a2f9602a972dade4a0b0785f74a2da0b8c0782816f3ae6846ae7942fcbb0f8172 – before 03826bc1fa6c90405bf05831f2b501a8368dcd27
Linux Linux 4.14

References