Log in Start free

Vulnerability · Published Aug 26, 2022 · Assigned by redhat

CVE-2021-3864

High 7.0

In plain English

A high-severity improper access control in kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS NVD)7.0High
Exploit odds (30 days)0.8%top 44.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Public PoC

Official description

A flaw was found in the way the dumpable flag setting was handled when certain SUID binaries executed its descendants. The prerequisite is a SUID binary that sets real UID equal to effective UID, and real GID equal to effective GID. The descendant will then have a dumpable value set to 1. As a result, if the descendant process crashes and core_pattern is set to a relative value, its core dump is stored in the current directory with uid:gid permissions. An unprivileged local user with eligible root SUID binary could use this flaw to place core dumps into root-owned directories, potentially resulting in escalation of privileges.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2021-3864
Debian:13linuxno fix listedDEBIAN-CVE-2021-3864
Debian:14linuxno fix listedDEBIAN-CVE-2021-3864
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2021-3864
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.04:LTSlinuxno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.10linuxno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2021-3864
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.04:LTSlinux-awsno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.10linux-awsno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2021-3864
Ubuntu:25.10linux-azureno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.10linux-azureno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2021-3864
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.10linux-azure-fdeno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2021-3864
Ubuntu:25.10linux-gcpno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.10linux-gcpno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-hwe-7.0no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.04:LTSlinux-oem-7.0no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2021-3864
Ubuntu:25.10linux-oracleno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.10linux-oracleno fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2021-3864
Ubuntu:25.10linux-raspino fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.10linux-raspino fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-3864
Ubuntu:25.10linux-realtimeno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.10linux-realtimeno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-3864
Ubuntu:25.10linux-riscvno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-3864
Ubuntu:26.10linux-riscvno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-riscv-7.0no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2021-3864
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2021-3864
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2021-3864

Affected products (as reported)

VendorProductVersions
n/a kernel Not Known

Weakness: CWE-284

References