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Vulnerability · Published Jun 9, 2026 · Assigned by Linux

CVE-2026-46330Revert "net/smc: Introduce TCP ULP support"

High 7.8

In plain English

A high-severity use-after-free 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 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 95.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: Revert "net/smc: Introduce TCP ULP support" This reverts commit d7cd421da9da2cc7b4d25b8537f66db5c8331c40. As reported by Al Viro, the TCP ULP support for SMC is fundamentally broken. The implementation attempts to convert an active TCP socket into an SMC socket by modifying the underlying `struct file`, dentry, and inode in-place, which violates core VFS invariants that assume these structures are immutable for an open file, creating a risk of use after free errors and general system instability. Given the severity of this design flaw and the fact that cleaner alternatives (e.g., LD_PRELOAD, BPF) exist for legacy application transparency, the correct course of action is to remove this feature entirely.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:9kernel5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-64k5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-64k-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-64k-debug5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-64k-debug-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-64k-debug-devel5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-64k-debug-devel-matched5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-64k-debug-modules5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-64k-devel5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-64k-devel-matched5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-64k-modules5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-64k-modules-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-64k-modules-extra5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-abi-stablelists5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-cross-headers5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-debug5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-debug-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-debug-devel5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-debug-devel-matched5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-debug-modules5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-debug-modules-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-debug-modules-extra5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-debug-uki-virt5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-devel5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-devel-matched5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-doc5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-headers5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-modules5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-modules-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-modules-extra5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-64k5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-64k-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-64k-debug5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-64k-debug-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-64k-debug-devel5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-64k-debug-modules5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-64k-debug-modules-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-64k-debug-modules-extra5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-64k-devel5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-64k-modules5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-64k-modules-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-64k-modules-extra5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-debug5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-debug-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-debug-devel5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-debug-modules5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-debug-modules-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-debug-modules-extra5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-devel5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-modules5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-modules-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-rt-modules-extra5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-tools5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-tools-libs5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-tools-libs-devel5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-uki-virt5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-uki-virt-addons5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-zfcpdump5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-zfcpdump-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-zfcpdump-devel5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-zfcpdump-devel-matched5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-zfcpdump-modules5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-zfcpdump-modules-core5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9kernel-zfcpdump-modules-extra5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9libperf5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9perf5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9python3-perf5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9rtla5.14.0-687.46.1.el9_8ALSA-2026:66180
AlmaLinux:9rv5.14.0-687.46.1.el9_8ALSA-2026:66180
Debian:12linuxno fix listedDEBIAN-CVE-2026-46330
Debian:13linux6.12.115-2DEBIAN-CVE-2026-46330
Debian:14linux6.19.6-1DEBIAN-CVE-2026-46330
Rocky Linux:9kernel0:5.14.0-687.46.1.el9_8RLSA-2026:66180
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-46330
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-46330
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-46330
Ubuntu:25.10linux-azureno fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-46330
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-46330
Ubuntu:25.10linux-gcpno fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1035.38UBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-46330
Ubuntu:25.10linux-oracleno fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-46330
Ubuntu:25.10linux-raspino fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-46330
Ubuntu:25.10linux-realtimeno fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-46330
Ubuntu:25.10linux-riscvno fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-46330
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-46330
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-46330

Affected products (as reported)

VendorProductVersions
Linux Linux d7cd421da9da2cc7b4d25b8537f66db5c8331c40 – before c7cb174a1edc80fe1f75b169a57726ed46704074d7cd421da9da2cc7b4d25b8537f66db5c8331c40 – before 74d33525db50d9d95156c79cc874752654e66e70d7cd421da9da2cc7b4d25b8537f66db5c8331c40 – before dc824ffc28e5c9d0020b6bee2651b4aceed5b2bfd7cd421da9da2cc7b4d25b8537f66db5c8331c40 – before dc24e03be0e4bb2aad1a9b272c4f86de3b11969ad7cd421da9da2cc7b4d25b8537f66db5c8331c40 – before 6c505d95c69e27dbf28fea29dc84d2498d69515cd7cd421da9da2cc7b4d25b8537f66db5c8331c40 – before df31a6b0a3057e66994ad6ccf5d95b9b9514f033
Linux Linux 5.17

Weakness: CWE-416 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References