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Vulnerability · Published May 28, 2026 · Assigned by Linux

CVE-2026-46104selinux: use sk blob accessor in socket permission helpers

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 98.1% 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: selinux: use sk blob accessor in socket permission helpers SELinux socket state lives in the composite LSM socket blob. sock_has_perm() and nlmsg_sock_has_extended_perms() currently dereference sk->sk_security directly, which assumes the SELinux socket blob is at offset zero. In stacked configurations that assumption does not hold. If another LSM allocates socket blob storage before SELinux, these helpers may read the wrong blob and feed invalid SID and class values into AVC checks. Use selinux_sock() instead of accessing sk->sk_security directly.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:14linux7.0.7-1DEBIAN-CVE-2026-46104
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux7.0.0-28.28USN-8566-1
Ubuntu:26.04:LTSlinux7.0.0-28.28UBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-46104
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-aws7.0.0-1009.9UBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-aws7.0.0-1009.9USN-8618-1
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-46104
Ubuntu:25.10linux-azureno fix listedUBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-azure7.0.0-1010.10UBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1014.14~24.04.1USN-8728-2
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-46104
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-azure-fde7.0.0-1009.9UBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-azure-fde-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-46104
Ubuntu:25.10linux-gcpno fix listedUBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-gcp7.0.0-1008.8USN-8566-1
Ubuntu:26.04:LTSlinux-gcp7.0.0-1008.8UBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1011.11~24.04.1USN-8728-1
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-gke7.0.0-1003.4UBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-gke7.0.0-1003.4USN-8566-1
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-28.28~24.04.1UBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-ibm7.0.0-1010.10USN-8593-1
Ubuntu:26.04:LTSlinux-ibm7.0.0-1010.10UBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-nvidia7.0.0-1016.16USN-8663-1
Ubuntu:26.04:LTSlinux-nvidia7.0.0-1016.16UBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1016.16~24.04.1USN-8663-1
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1016.16~24.04.1UBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2016.16UBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2016.16USN-8664-1
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1009.9USN-8568-1
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1009.9UBUNTU-CVE-2026-46104
Ubuntu:25.10linux-oracleno fix listedUBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-oracle7.0.0-1008.8USN-8593-1
Ubuntu:26.04:LTSlinux-oracle7.0.0-1008.8UBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1011.11~24.04.1USN-8728-3
Ubuntu:25.10linux-raspino fix listedUBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-raspi7.0.0-1015.15UBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-raspi7.0.0-1015.15USN-8618-1
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-46104
Ubuntu:25.10linux-realtimeno fix listedUBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-realtime7.0.0-28.28.1UBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-realtime7.0.0-28.28.1USN-8566-1
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-46104
Ubuntu:25.10linux-riscvno fix listedUBUNTU-CVE-2026-46104
Ubuntu:26.04:LTSlinux-riscv7.0.0-28.28.1UBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-46104
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-28.28.1~24.04.3UBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-46104
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-46104

Affected products (as reported)

VendorProductVersions
Linux Linux d1d991efaf34606d500dcbd28bedc0666eeec8e2 – before d350fef4bc2467fe1bce15f7a20fe60e01ce41add1d991efaf34606d500dcbd28bedc0666eeec8e2 – before 7eca71f57f194c1638ebb7f4097d6be8fd04c101d1d991efaf34606d500dcbd28bedc0666eeec8e2 – before 032e70aff025d7c519af9ab791cd084380619263
Linux Linux 6.13

References