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Vulnerability · Published May 28, 2026 · Assigned by Linux

CVE-2026-46170mptcp: pm: ADD_ADDR rtx: free sk if last

Medium 5.5

In plain English

A medium-severity 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 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.1%top 97.5% 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: mptcp: pm: ADD_ADDR rtx: free sk if last When an ADD_ADDR is retransmitted, the sk is held in sk_reset_timer(), and released at the end. If at that moment, it was the last reference being held, the sk would not be freed. sock_put() should then be called instead of __sock_put(). But that's not enough: if it is the last reference, sock_put() will call sk_free(), which will end up calling sk_stop_timer_sync() on the same timer, and waiting indefinitely to finish. So it is needed to mark that the timer is done at the end of the timer handler when it has not been rescheduled, not to call sk_stop_timer_sync() on "itself".

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.187-1DEBIAN-CVE-2026-46170
Debian:13linux6.12.94-1DEBIAN-CVE-2026-46170
Debian:14linux7.0.7-1DEBIAN-CVE-2026-46170
Ubuntu:22.04:LTSlinux5.15.0-202.212UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux6.8.0-139.139USN-8729-1
Ubuntu:24.04:LTSlinux6.8.0-139.139UBUNTU-CVE-2026-46170
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-46170
Ubuntu:26.04:LTSlinux7.0.0-28.28UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-aws5.15.0-1119.126UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-aws6.8.0-1064.67UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-aws6.8.0-1064.67USN-8729-6
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2026-46170
Ubuntu:26.04:LTSlinux-aws7.0.0-1009.9UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1064.67~22.04.1USN-8729-6
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1064.67~22.04.1UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-azure5.15.0-1125.134UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-azure6.8.0-1067.75USN-8761-1
Ubuntu:24.04:LTSlinux-azure6.8.0-1067.75UBUNTU-CVE-2026-46170
Ubuntu:25.10linux-azureno fix listedUBUNTU-CVE-2026-46170
Ubuntu:26.04:LTSlinux-azure7.0.0-1010.10UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1067.75~22.04.1USN-8761-3
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1067.75~22.04.1UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1124.133UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1065.72USN-8793-1
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1065.72UBUNTU-CVE-2026-46170
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-46170
Ubuntu:26.04:LTSlinux-azure-fde7.0.0-1009.9UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1065.72~22.04.1USN-8793-2
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1065.72~22.04.1UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-azure-fde-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-gcp5.15.0-1120.130UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-gcp6.8.0-1067.75USN-8729-1
Ubuntu:24.04:LTSlinux-gcp6.8.0-1067.75UBUNTU-CVE-2026-46170
Ubuntu:25.10linux-gcpno fix listedUBUNTU-CVE-2026-46170
Ubuntu:26.04:LTSlinux-gcp7.0.0-1008.8UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1067.75~22.04.1UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1067.75~22.04.1USN-8729-3
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-gke5.15.0-1115.121UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-gke6.8.0-1062.70USN-8729-1
Ubuntu:24.04:LTSlinux-gke6.8.0-1062.70UBUNTU-CVE-2026-46170
Ubuntu:26.04:LTSlinux-gke7.0.0-1003.4UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1102.110UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1049.53UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1049.53USN-8729-1
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-28.28~24.04.1UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-ibm5.15.0-1113.117UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-ibm6.8.0-1064.65USN-8729-3
Ubuntu:24.04:LTSlinux-ibm6.8.0-1064.65UBUNTU-CVE-2026-46170
Ubuntu:26.04:LTSlinux-ibm7.0.0-1010.10UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1066.67~22.04.1UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1066.67~22.04.1USN-8906-1
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1114.120UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-kvm5.15.0-1111.116UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-197.207UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-139.139.1USN-8729-4
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-139.139.1UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-139.139.1~22.04.1UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-139.139.1~22.04.1USN-8729-4
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1114.115UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1062.65USN-8729-1
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1062.65UBUNTU-CVE-2026-46170
Ubuntu:26.04:LTSlinux-nvidia7.0.0-1016.16UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1062.65~22.04.1USN-8729-1
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1062.65~22.04.1UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1016.16~24.04.1UBUNTU-CVE-2026-46170
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2016.16UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1062.65.1UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1062.65.1USN-8729-1
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1070.72UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1035.38UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1059.59UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-46170
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1009.9UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-oracle5.15.0-1116.122UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-oracle6.8.0-1061.64UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-oracle6.8.0-1061.64USN-8802-1
Ubuntu:25.10linux-oracleno fix listedUBUNTU-CVE-2026-46170
Ubuntu:26.04:LTSlinux-oracle7.0.0-1008.8UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1061.64~22.04.1USN-8802-1
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1061.64~22.04.1UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-raspi6.8.0-1064.68USN-8729-1
Ubuntu:24.04:LTSlinux-raspi6.8.0-1064.68UBUNTU-CVE-2026-46170
Ubuntu:25.10linux-raspino fix listedUBUNTU-CVE-2026-46170
Ubuntu:26.04:LTSlinux-raspi7.0.0-1015.15UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-46170
Ubuntu:25.10linux-realtimeno fix listedUBUNTU-CVE-2026-46170
Ubuntu:26.04:LTSlinux-realtime7.0.0-28.28.1UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-46170
Ubuntu:25.10linux-riscvno fix listedUBUNTU-CVE-2026-46170
Ubuntu:26.04:LTSlinux-riscv7.0.0-28.28.1UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-139.139~22.04.1UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-28.28.1~24.04.3UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-vmware6.8.0-1008.8UBUNTU-CVE-2026-46170
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1036.37USN-8729-3
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1036.37UBUNTU-CVE-2026-46170
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-46170

Affected products (as reported)

VendorProductVersions
Linux Linux 00cfd77b9063dcdf3628a7087faba60de85a9cc8 – before aa8cabde7e83bf96269ee47427dc9b59e3ed8e6000cfd77b9063dcdf3628a7087faba60de85a9cc8 – before 1f26487e83e69462540bb1047139472957c913c600cfd77b9063dcdf3628a7087faba60de85a9cc8 – before 5da972efed3dc7599da6e2b5e8d906d1b7b1a72800cfd77b9063dcdf3628a7087faba60de85a9cc8 – before 6a3af482188f6db4186d1605f64d911d7330abb300cfd77b9063dcdf3628a7087faba60de85a9cc8 – before 531c537b8fb620beabccfb1594e8d43cbebbb87a00cfd77b9063dcdf3628a7087faba60de85a9cc8 – before b74ad20198652b6b39a761c277ba65ae82b1e10700cfd77b9063dcdf3628a7087faba60de85a9cc8 – before 8143a224785ceaf2b0856e08d4498916f38228fb00cfd77b9063dcdf3628a7087faba60de85a9cc8 – before b7b9a461569734d33d3259d58d2507adfac107ed
Linux Linux 5.10

References