CVE-2021-4001

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Summary

CVECVE-2021-4001
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-01-21 19:15:00 UTC
Updated2022-11-16 03:36:00 UTC
DescriptionA race condition was found in the Linux kernel's ebpf verifier between bpf_map_update_elem and bpf_map_freeze due to a missing lock in kernel/bpf/syscall.c. In this flaw, a local user with a special privilege (cap_sys_admin or cap_bpf) can modify the frozen mapped address space. This flaw affects kernel versions prior to 5.16 rc2.

Risk And Classification

Problem Types: CWE-367

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel 5.16 rc1 All All
Operating System Linux Linux Kernel All All All All

References

ReferenceSourceLinkTags
kernel/git/bpf/bpf.git - BPF kernel tree MISC git.kernel.org
2025645 – (CVE-2021-4001) CVE-2021-4001 kernel: race condition when the EBPF map is frozen MISC bugzilla.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 180355 Debian Security Update for linux (CVE-2021-4001)
  • 198616 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-5207-1)
  • 198653 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5265-1)
  • 198659 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-5278-1)
  • 199804 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6417-1)
  • 282087 Fedora Security Update for kernel (FEDORA-2021-c0dc424b7d)
  • 282133 Fedora Security Update for kernel (FEDORA-2021-19ad835cb3)
  • 353141 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.4-2022-010
  • 353152 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.10-2022-008
  • 751590 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2022:0056-1)
  • 751622 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2022:0131-1)
  • 751654 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0197-1)
  • 751989 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0131-1)
  • 753132 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 2 for SLE 15 SP3) (SUSE-SU-2022:0978-1)
  • 753133 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0181-1)
  • 753264 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0079-1)
  • 753355 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0056-1)
  • 753487 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 10 for SLE 15 SP3) (SUSE-SU-2022:0984-1)
  • 900617 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (8322)
  • 905851 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (8322-1)
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