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Vulnerability · Published May 28, 2026 · Assigned by canonical

CVE-2026-47331Use-after-free in Ubuntu Linux AppArmor notification handling

High 7.8

In plain English

A high-severity use-after-free in Ubuntu Linux from Canonical. 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 1% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 98.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An unprivileged local user could trigger the race condition that can lead to a use-after-free (UAF) and, theoretically, arbitrary code execution.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Ubuntu:24.04:LTSlinux6.8.0-124.124UBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux6.8.0-124.124USN-8373-1
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-aws6.8.0-1057.60UBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-aws6.8.0-1057.60USN-8373-1
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1057.60~22.04.1UBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1057.60~22.04.1USN-8373-1
Ubuntu:24.04:LTSlinux-azure6.8.0-1058.64USN-8373-1
Ubuntu:24.04:LTSlinux-azure6.8.0-1058.64UBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1059.65~22.04.1UBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1058.65UBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1058.65~22.04.1UBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-gcp6.8.0-1060.63USN-8373-1
Ubuntu:24.04:LTSlinux-gcp6.8.0-1060.63UBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1060.63~22.04.1USN-8373-1
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1060.63~22.04.1UBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-gke6.8.0-1055.61USN-8373-1
Ubuntu:24.04:LTSlinux-gke6.8.0-1055.61UBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1042.45USN-8373-1
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1042.45UBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-124.124~22.04.1UBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-124.124~22.04.1USN-8373-1
Ubuntu:24.04:LTSlinux-ibm6.8.0-1057.58UBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-ibm6.8.0-1057.58USN-8373-1
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1057.58~22.04.1USN-8373-1
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1057.58~22.04.1UBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-134.134.1UBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-134.134.1~22.04.1UBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1055.58UBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1055.58USN-8373-1
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1055.58~22.04.1UBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1055.58~22.04.1USN-8373-1
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1055.58.1UBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1055.58.1USN-8373-1
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1026.26USN-8373-1
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1026.26UBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-oracle6.8.0-1054.55UBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-oracle6.8.0-1054.55USN-8373-1
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1054.55~22.04.1UBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1054.55~22.04.1USN-8373-1
Ubuntu:24.04:LTSlinux-raspi6.8.0-1057.61USN-8373-1
Ubuntu:24.04:LTSlinux-raspi6.8.0-1057.61UBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-124.124~22.04.1UBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-47331
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-47331
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1032.33UBUNTU-CVE-2026-47331

Affected products (as reported)

VendorProductVersions
Canonical Ubuntu Linux 6.8.0 – before 6.8.0-124.124

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

References