CVE-2021-4135

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Summary

CVECVE-2021-4135
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-07-14 20:15:08 UTC
Updated2026-10-08 21:17:42 UTC
DescriptionA memory leak vulnerability was found in the Linux kernel's eBPF for the Simulated networking device driver in the way user uses BPF for the device such that function nsim_map_alloc_elem being called. A local user could use this flaw to get unauthorized access to some data.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.002310000 probability, percentile 0.128880000 (date 2026-10-10)

Problem Types: CWE-200 | CWE-401 | CWE-200 CWE-200

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All
Operating System Linux Linux Kernel 5.16 - All All
Operating System Linux Linux Kernel 5.16 rc1 All All
Operating System Linux Linux Kernel 5.16 rc2 All All
Operating System Linux Linux Kernel 5.16 rc3 All All
Operating System Linux Linux Kernel 5.16 rc4 All All
Operating System Linux Linux Kernel 5.16 rc5 All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Kernel affected Linux kernel versions prior to 5.16-rc6 Not specified

References

ReferenceSourceLinkTags
kernel/git/netdev/net.git - Netdev Group's networking tree af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Mailing List, Patch, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 179117 Debian Security Update for linux (DSA 5096-1)
  • 179119 Debian Security Update for linux-4.19 (DLA 2941-1)
  • 179900 Debian Security Update for linux (CVE-2021-4135)
  • 198659 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-5278-1)
  • 198708 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5337-1)
  • 198709 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5338-1)
  • 198731 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5368-1)
  • 198740 Ubuntu Security Notification for Linux kernel (BlueField) Vulnerabilities (USN-5377-1)
  • 353130 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.4-2022-021
  • 353151 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.10-2022-009
  • 376925 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX3-SA-2022:0125)
  • 377124 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX3-SA-2022:0029)
  • 377181 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX2-SA-2022:0022)
  • 6140040 AWS Bottlerocket Security Update for kernel (GHSA-954g-9hrr-6f8x)
  • 671367 EulerOS Security Update for kernel (EulerOS-SA-2022-1308)
  • 671380 EulerOS Security Update for kernel (EulerOS-SA-2022-1292)
  • 671436 EulerOS Security Update for kernel (EulerOS-SA-2022-1352)
  • 671498 EulerOS Security Update for kernel (EulerOS-SA-2022-1466)
  • 671543 EulerOS Security Update for kernel (EulerOS-SA-2022-1475)
  • 751654 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0197-1)
  • 751657 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2022:0198-1)
  • 751666 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2022:0169-1)
  • 751696 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0364-1)
  • 751697 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0366-1)
  • 751701 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2022:0366-1)
  • 751703 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0372-1)
  • 751993 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0198-1)
  • 753194 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0288-1)
  • 753267 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0169-1)
  • 753462 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0289-1)
  • 902526 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (10137)
  • 903997 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (10134-1)
  • 904149 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (10137-1)
  • 906021 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (10134-2)
  • 906429 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (10137-2)

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