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Vulnerability · Published Oct 23, 2026 · Assigned by Linux

CVE-2026-98948mlxsw: spectrum_flower: Fix port range register leak in tmplt_create()

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

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 93.8% 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: mlxsw: spectrum_flower: Fix port range register leak in tmplt_create() mlxsw_sp_flower_tmplt_create() parses a flow_cls_offload template into a stack-local struct mlxsw_sp_acl_rule_info purely to compute rulei.values.elusage. Parsing can acquire port range registers via mlxsw_sp_flower_parse_ports_range(), but since this rulei never goes through mlxsw_sp_acl_rulei_destroy(), those registers were never released, including through chain template deletion. Factor out of mlxsw_sp_acl_rulei_destroy() the code to actually release the necessary resources and call from mlxsw_sp_flower_tmplt_create() to plug the leak. The issue was found during a review of Wentao Liang's patch referenced below.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13linux6.12.113-1DEBIAN-CVE-2026-98948
Debian:14linux7.2.11-1DEBIAN-CVE-2026-98948
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.10linux7.3.0-10.10UBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.10linux-aws7.3.0-1004.4UBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.10linux-azureno fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.10linux-gcp7.3.0-1004.4UBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-hwe-7.0no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.04:LTSlinux-oem-7.0no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.10linux-oracle7.3.0-1004.4UBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.10linux-raspi7.3.0-1004.4UBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.10linux-realtime7.3.0-10.10.1UBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98948
Ubuntu:26.10linux-riscv7.3.0-10.10.1UBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-riscv-7.0no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-98948
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-98948
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-98948

Affected products (as reported)

VendorProductVersions
Linux Linux fe22f7410527c2077223b5fd0fc0458db912f0db – before 41ad5bcf0219aaebf8ffb052c5e8177479330cdefe22f7410527c2077223b5fd0fc0458db912f0db – before c8e934287debb29c6ded86b21e49fc72e186d15efe22f7410527c2077223b5fd0fc0458db912f0db – before 3938430f0237c59ca08d6a366e7657b2b7f8d0bbfe22f7410527c2077223b5fd0fc0458db912f0db – before 4eaf1285b5c1e42f80e47f9fe0d391e70418db02fe22f7410527c2077223b5fd0fc0458db912f0db – before 7ea07afb230f1342ab0f9365edd0aae137f425d3
Linux Linux 6.6

References