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TI-2021-03025 Aliases CVE-2021-4154GHSA-qvm5-4fh7-hcfx

Use after free in kernel

Priority MEDIUM 40CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

A use-after-free flaw was found in cgroup1_parse_param in kernel/cgroup/cgroup-v1.c in the Linux kernel's cgroup v1 parser. A local attacker with a user privilege could cause a privilege escalation by exploiting the fsconfig syscall parameter leading to a container breakout and a denial of service on the system.

Why it matters now

EPSS 0.01216 68th percentileScored 2026-11-07
Fix Fixed Red Hat: 7 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—kernelFixed in kernel 5.14 rc2—No fix listedCNA
  • kernel Vendor— Affected Fixed in kernel 5.14 rc2 Fixed in — No fix listed CNA

CPE configurations NVD · 11

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*5.1 to before 5.4.134; 5.5 to before 5.10.52; 5.11 to before 5.12.19; 5.13 to before 5.13.4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:*5.14 rc1VulnerableLinux
cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:*4.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*8.0VulnerableRed Hat
cpe:2.3:a:netapp:hci_baseboard_management_controller:h300e:*:*:*:*:*:*:*h300eVulnerableNetApp
cpe:2.3:a:netapp:hci_baseboard_management_controller:h300s:*:*:*:*:*:*:*h300sVulnerableNetApp
cpe:2.3:a:netapp:hci_baseboard_management_controller:h410s:*:*:*:*:*:*:*h410sVulnerableNetApp
cpe:2.3:a:netapp:hci_baseboard_management_controller:h500e:*:*:*:*:*:*:*h500eVulnerableNetApp
cpe:2.3:a:netapp:hci_baseboard_management_controller:h500s:*:*:*:*:*:*:*h500sVulnerableNetApp
cpe:2.3:a:netapp:hci_baseboard_management_controller:h700e:*:*:*:*:*:*:*h700eVulnerableNetApp
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.1 to before 5.4.134; 5.5 to before 5.10.52; 5.11 to before 5.12.19; 5.13 to before 5.13.4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:* Versions 5.14 rc1 Vulnerable ·Linux
  • cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:* Versions 8.0 Vulnerable ·Red Hat
  • cpe:2.3:a:netapp:hci_baseboard_management_controller:h300e:*:*:*:*:*:*:* Versions h300e Vulnerable ·NetApp
  • cpe:2.3:a:netapp:hci_baseboard_management_controller:h300s:*:*:*:*:*:*:* Versions h300s Vulnerable ·NetApp
  • cpe:2.3:a:netapp:hci_baseboard_management_controller:h410s:*:*:*:*:*:*:* Versions h410s Vulnerable ·NetApp
  • cpe:2.3:a:netapp:hci_baseboard_management_controller:h500e:*:*:*:*:*:*:* Versions h500e Vulnerable ·NetApp
  • cpe:2.3:a:netapp:hci_baseboard_management_controller:h500s:*:*:*:*:*:*:* Versions h500s Vulnerable ·NetApp
  • cpe:2.3:a:netapp:hci_baseboard_management_controller:h700e:*:*:*:*:*:*:* Versions h700e Vulnerable ·NetApp
Show 1 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:netapp:hci_baseboard_management_controller:h700s:*:*:*:*:*:*:*h700sVulnerableNetApp
  • cpe:2.3:a:netapp:hci_baseboard_management_controller:h700s:*:*:*:*:*:*:* Versions h700s Vulnerable ·NetApp

Remediation

Red Hat 7 advisories

  • RHSA-2022:0849 Released 2022-03-14 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS (v. 8) kpatch-patch-4_18_0-348-1-3.el8, kpatch-patch-4_18_0-348_12_2-1-1.el8_5, kpatch-patch-4_18_0-348_2_1-1-2.el8_5 +1
  • RHSA-2022:0841 Released 2022-03-14 · Red Hat rating Important
    Red Hat Virtualization Host security and bug fix update [ovirt-4.4.10] Async #1
    • Red Hat Virtualization 4 Hypervisor for RHEL 8 redhat-virtualization-host-4.4.10-202203101736_8.5, redhat-virtualization-host-image-update-4.4.10-202203101736_8.5
  • RHSA-2022:0825 Released 2022-03-10 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-348.20.1.el8_5
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-348.20.1.el8_5, kernel-4.18.0-348.20.1.el8_5, kernel-abi-stablelists-4.18.0-348.20.1.el8_5 +19
Show 4 more Red Hat advisories
  • RHSA-2022:0819 Released 2022-03-10 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt-4.18.0-348.20.1.rt7.150.el8_5, kernel-rt-core-4.18.0-348.20.1.rt7.150.el8_5, kernel-rt-debug-4.18.0-348.20.1.rt7.150.el8_5 +9
    • Red Hat Enterprise Linux for Real Time (v. 8) kernel-rt-4.18.0-348.20.1.rt7.150.el8_5, kernel-rt-core-4.18.0-348.20.1.rt7.150.el8_5, kernel-rt-debug-4.18.0-348.20.1.rt7.150.el8_5 +7
  • RHSA-2022:0231 Released 2022-01-24 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.4) kpatch-patch-4_18_0-305-1-10.el8, kpatch-patch-4_18_0-305_10_2-1-7.el8_4, kpatch-patch-4_18_0-305_12_1-1-6.el8_4 +7
  • RHSA-2022:0186 Released 2022-01-19 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.4) bpftool-4.18.0-305.34.2.el8_4, kernel-4.18.0-305.34.2.el8_4, kernel-abi-stablelists-4.18.0-305.34.2.el8_4 +19
    • Red Hat Enterprise Linux CRB EUS (v.8.4) kernel-tools-libs-devel-4.18.0-305.34.2.el8_4
  • RHSA-2022:0187 Released 2022-01-19 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux NFV EUS (v.8.4) kernel-rt-4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-core-4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-debug-4.18.0-305.34.2.rt7.107.el8_4 +9
    • Red Hat Enterprise Linux RT EUS (v.8.4) kernel-rt-4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-core-4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-debug-4.18.0-305.34.2.rt7.107.el8_4 +7

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2022:0825
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2022:0825, RHSA-2022:0849
Red Hat Enterprise Linux BaseOS EUS (v.8.4)Fixed RHSA-2022:0186, RHSA-2022:0231
Red Hat Enterprise Linux CRB EUS (v.8.4)Fixed RHSA-2022:0186
Red Hat Enterprise Linux NFV EUS (v.8.4)Fixed RHSA-2022:0187
Red Hat Enterprise Linux RT EUS (v.8.4)Fixed RHSA-2022:0187
Red Hat Enterprise Linux Real Time for NFV (v. 8)Fixed RHSA-2022:0819
Red Hat Enterprise Linux for Real Time (v. 8)Fixed RHSA-2022:0819
Red Hat Virtualization 4 Hypervisor for RHEL 8Fixed RHSA-2022:0841
Not affected: 4 products
  • RHEL 8-based RHEV-H for RHEV 4 (build requirements)
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-4154
  2. 2026-10-03 Alias added: GHSA-qvm5-4fh7-hcfx

References

Patch 2

Advisory 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences