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Vulnerability · Published Oct 23, 2026 · Assigned by Linux

CVE-2026-99026net: team: free skb when broadcast has no txable port

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 93.1% 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: net: team: free skb when broadcast has no txable port bc_transmit() sends the original skb through the last txable port. When no port is txable, it returns false without consuming the skb, but team_xmit() still returns NETDEV_TX_OK. AF_PACKET sends then retain the skb and its socket write-memory charge. A TX-enabled, link-down port keeps the broadcast transmit op installed. Carrier can stay up through a second link-up, TX-disabled port or be forced on by userspace. Free the original skb on the no-port path while leaving the existing drop accounting intact. Discovered by Sashiko during review of previous commit.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-99026
Debian:13linuxno fix listedDEBIAN-CVE-2026-99026
Debian:14linux7.2.11-1DEBIAN-CVE-2026-99026
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.10linux7.3.0-10.10UBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.10linux-aws7.3.0-1004.4UBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.10linux-azureno fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.10linux-gcp7.3.0-1004.4UBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-hwe-7.0no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.04:LTSlinux-oem-7.0no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.10linux-oracle7.3.0-1004.4UBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.10linux-raspi7.3.0-1004.4UBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.10linux-realtime7.3.0-10.10.1UBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99026
Ubuntu:26.10linux-riscv7.3.0-10.10.1UBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-riscv-7.0no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-99026
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-99026
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-99026

Affected products (as reported)

VendorProductVersions
Linux Linux 5fc889911a99043a97da1daa0d010ad72cbc3042 – before 961563117626f4681623077ec0cfd86f86da0d495fc889911a99043a97da1daa0d010ad72cbc3042 – before f34b1bcac4581a5bd3daf9eff90f175e736b54aa5fc889911a99043a97da1daa0d010ad72cbc3042 – before 489114c9ecae44e523361a4b3e610ee5ebd9189c
Linux Linux 3.6

References