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Vulnerability · Published Sep 17, 2026 · Assigned by Linux

CVE-2026-90415RDMA/cxgb4: free STAG index when TPT entry write fails

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 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 92.7% 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/cxgb4: free STAG index when TPT entry write fails write_tpt_entry() allocates a new STAG index with c4iw_get_resource() and bumps stats.stag.cur before programming the entry. When write_adapter_mem() fails, it returns the error without releasing the index or reversing the statistic. No MR is inserted into rhp->mrs, so deregistration never reclaims it, leaking the index until device teardown. Record whether this call allocated the index and, on a failed write, return it to tpt_table and decrement stats.stag.cur. Key the rollback on both the write error and that flag, not the error alone: a non-reset update carries a caller-owned STAG that this call did not allocate and must not free.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.190-1DEBIAN-CVE-2026-90415
Debian:13linux6.12.111-1DEBIAN-CVE-2026-90415
Debian:14linux7.2.6-1DEBIAN-CVE-2026-90415
Debian:12linux-6.126.12.111-1~deb12u1DEBIAN-CVE-2026-90415
Ubuntu:22.04:LTSlinux5.15.0-202.212UBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-90415
Ubuntu:26.04:LTSlinux7.0.0-42.42UBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-aws5.15.0-1119.126UBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-90415
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17UBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-azure5.15.0-1125.134UBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-90415
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1124.133UBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-90415
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-gcp5.15.0-1120.130UBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-90415
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18UBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-gke5.15.0-1115.121UBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-90415
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1102.110UBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1UBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-ibm5.15.0-1113.117UBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-90415
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17UBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1114.120UBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-kvm5.15.0-1111.116UBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-197.207UBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1114.115UBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-90415
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-90415
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1070.72UBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1059.59UBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-90415
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1017.17UBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-oracle5.15.0-1116.122UBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-90415
Ubuntu:26.04:LTSlinux-oracle7.0.0-1015.16UBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-90415
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-90415
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-90415
Ubuntu:26.04:LTSlinux-riscv7.0.0-42.42.1UBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-42.42.1~24.04.1UBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-90415
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-90415
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-90415

Affected products (as reported)

VendorProductVersions
Linux Linux ec3eead217181d7360a11317a888ceb30807867c – before 5fe4731bfbd8d83c4a14b4af3a27329969ce8a99ec3eead217181d7360a11317a888ceb30807867c – before 8f6976d635d190e3d7af7103daaa581cf1ccc12eec3eead217181d7360a11317a888ceb30807867c – before 9eeafcda1d6c11f0eec532243c4e96ec8c632bd7ec3eead217181d7360a11317a888ceb30807867c – before 5a21e5114cec4cd3f8a2843d4c46bc49634d6e96ec3eead217181d7360a11317a888ceb30807867c – before 2f17ca7ab5269ac2504e1039c3921373dccd7712ec3eead217181d7360a11317a888ceb30807867c – before a2e37d1ab773be3cd26b1c19593ca2dbcece9c57ec3eead217181d7360a11317a888ceb30807867c – before a64e2beb450179a5d43034af8d5476a11eac1486ec3eead217181d7360a11317a888ceb30807867c – before fdfb5cea4bf070cdb31d997efd87bb684df041fd
Linux Linux 3.5

References