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Vulnerability · Published Jun 8, 2026 · Assigned by Linux

CVE-2026-46302selinux: allow multiple opens of /sys/fs/selinux/policy

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 98.5% 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: selinux: allow multiple opens of /sys/fs/selinux/policy Currently there can only be a single open of /sys/fs/selinux/policy at any time. This allows any process to block any other process from reading the kernel policy. The original motivation seems to have been a mix of preventing an inconsistent view of the policy size and preventing userspace from allocating kernel memory without bound, but this is arguably equally bad. Eliminate the policy_opened flag and shrink the critical section that the policy mutex is held. While we are making changes here, drop a couple of extraneous BUG_ONs.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-46302
Debian:13linux6.12.115-2DEBIAN-CVE-2026-46302
Debian:14linux7.0.7-1DEBIAN-CVE-2026-46302
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-46302
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-46302
Ubuntu:26.04:LTSlinux7.0.0-28.28UBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-46302
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2026-46302
Ubuntu:26.04:LTSlinux-aws7.0.0-1009.9UBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-46302
Ubuntu:25.10linux-azureno fix listedUBUNTU-CVE-2026-46302
Ubuntu:26.04:LTSlinux-azure7.0.0-1010.10UBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-46302
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-46302
Ubuntu:26.04:LTSlinux-azure-fde7.0.0-1009.9UBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-azure-fde-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-46302
Ubuntu:25.10linux-gcpno fix listedUBUNTU-CVE-2026-46302
Ubuntu:26.04:LTSlinux-gcp7.0.0-1008.8UBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-46302
Ubuntu:26.04:LTSlinux-gke7.0.0-1003.4UBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-28.28~24.04.1UBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-46302
Ubuntu:26.04:LTSlinux-ibm7.0.0-1010.10UBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-46302
Ubuntu:26.04:LTSlinux-nvidia7.0.0-1016.16UBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1016.16~24.04.1UBUNTU-CVE-2026-46302
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2016.16UBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-46302
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1009.9UBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-46302
Ubuntu:25.10linux-oracleno fix listedUBUNTU-CVE-2026-46302
Ubuntu:26.04:LTSlinux-oracle7.0.0-1008.8UBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-46302
Ubuntu:25.10linux-raspino fix listedUBUNTU-CVE-2026-46302
Ubuntu:26.04:LTSlinux-raspi7.0.0-1015.15UBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-46302
Ubuntu:25.10linux-realtimeno fix listedUBUNTU-CVE-2026-46302
Ubuntu:26.04:LTSlinux-realtime7.0.0-28.28.1UBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-46302
Ubuntu:25.10linux-riscvno fix listedUBUNTU-CVE-2026-46302
Ubuntu:26.04:LTSlinux-riscv7.0.0-28.28.1UBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-28.28.1~24.04.3UBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-46302
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-46302
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-46302

Affected products (as reported)

VendorProductVersions
Linux Linux cee74f47a6baba0ac457e87687fdcf0abd599f0a – before 9795810d116bc9071485929ba6471dc8d5bd158bcee74f47a6baba0ac457e87687fdcf0abd599f0a – before d8cafd0226d5df682d1f4ea978a4318fe3a11210cee74f47a6baba0ac457e87687fdcf0abd599f0a – before 0ed712134a3db0075bfe9a0f8536c48728ec745ecee74f47a6baba0ac457e87687fdcf0abd599f0a – before c24d2e190b955baf3a95e05d34b192f61bd201b3cee74f47a6baba0ac457e87687fdcf0abd599f0a – before 714362f3779dfa453a78ced32396a72726962a41cee74f47a6baba0ac457e87687fdcf0abd599f0a – before a02cd6805562305f936e807da83e253b719dd965
Linux Linux 2.6.37

References