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Vulnerability · Published Dec 16, 2025 · Assigned by Linux

CVE-2025-68188tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()

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 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 86.9% 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: tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check() Use RCU to avoid a pair of atomic operations and a potential UAF on dst_dev()->flags.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2025-68188
Debian:13linux6.12.63-1DEBIAN-CVE-2025-68188
Debian:14linux6.17.8-1DEBIAN-CVE-2025-68188
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2025-68188
Ubuntu:25.10linux6.17.0-14.14UBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-68188
Ubuntu:25.10linux-aws6.17.0-1007.7UBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-aws-6.176.17.0-1007.7~24.04.1UBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-68188
Ubuntu:25.10linux-azure6.17.0-1008.8UBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-68188
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-68188
Ubuntu:25.10linux-gcp6.17.0-1007.7UBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-gcp-6.176.17.0-1008.8~24.04.1UBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-nvidia-6.176.17.0-1008.8UBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1011.11UBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2025-68188
Ubuntu:25.10linux-oracle6.17.0-1007.7UBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-oracle-6.176.17.0-1007.7~24.04.1UBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-68188
Ubuntu:25.10linux-raspi6.17.0-1008.8UBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-68188
Ubuntu:25.10linux-realtime6.17.0-1006.7UBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-68188
Ubuntu:25.10linux-riscv6.17.0-14.14.1UBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2025-68188
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2025-68188
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2025-68188

Affected products (as reported)

VendorProductVersions
Linux Linux cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 – before d3fe882ed33a1e45921764f4615bf82db79d8dcdcf1ef3f0719b4dcb74810ed507e2a2540f9811b4 – before e61dfd906ad027a4ade1f89e5fe706a3fcd52527cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 – before bc2b881a0896c111c1041d8bb1f92a3b3873ace5cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 – before 06da08d9355bf8e2070459bbedbe372ccc02cc0ecf1ef3f0719b4dcb74810ed507e2a2540f9811b4 – before b62a59c18b692f892dcb8109c1c2e653b2abc95c
Linux Linux 4.12

References