CVE-2021-3506

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Summary

CVECVE-2021-3506
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-04-19 22:15:13 UTC
Updated2026-09-01 18:04:20 UTC
DescriptionAn out-of-bounds (OOB) memory access flaw was found in fs/f2fs/node.c in the f2fs module in the Linux kernel in versions before 5.12.0-rc4. A bounds check failure allows a local attacker to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

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

Problem Types: CWE-125 | CWE-125 CWE-125

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
2.0[email protected]Primary5.6AV:L/AC:L/Au:N/C:P/I:N/A:C

CVSS v3.1 Breakdown

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

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

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
Complete

AV:L/AC:L/Au:N/C:P/I:N/A:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Kernel affected kernel 5.12.0-rc4 Not specified

References

ReferenceSourceLinkTags
1944298 – (CVE-2021-3506) CVE-2021-3506 kernel: Out of bounds memory access bug in get_next_net_page() in fs/f2fs/node.c af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Third Party Advisory
oss-security - Linux kernel: f2fs: out-of-bounds memory access bug af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Patch, Third Party Advisory
CVE-2021-3506 Linux Kernel Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
oss-security - Re: Linux kernel: f2fs: out-of-bounds memory access bug af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Patch, Third Party Advisory
[SECURITY] [DLA 2690-1] linux-4.19 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
[PATCH] f2fs: fix to avoid out-of-bounds memory access af854a3a-2127-422b-91ae-364da2661108 www.mail-archive.com Mailing List, Third Party Advisory
[PATCH] f2fs: fix to avoid out-of-bounds memory access MITRE www.mail-archive.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 178679 Debian Security Update for linux-4.19 (DLA 2690-1)
  • 179603 Debian Security Update for linux (CVE-2021-3506)
  • 198416 Ubuntu Security Notification for Linux kernel vulnerabilities (USN-4997-1)
  • 198418 Ubuntu Security Notification for Linux kernel vulnerabilities (USN-5000-1)
  • 198419 Ubuntu Security Notification for Linux kernel (OEM) vulnerabilities (USN-5001-1)
  • 198425 Ubuntu Security Notification for Linux kernel (KVM) vulnerabilities (USN-5000-2)
  • 198426 Ubuntu Security Notification for Linux kernel (KVM) vulnerabilities (USN-4997-2)
  • 198437 Ubuntu Security Notification for Linux kernel vulnerabilities (USN-5016-1) (Sequoia)
  • 198707 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5339-1)
  • 353147 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.4-2022-004
  • 353158 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.10-2022-002
  • 670514 EulerOS Security Update for kernel (EulerOS-SA-2021-2272)
  • 900096 CBL-Mariner Linux Security Update for kernel 5.10.52.1
  • 900304 CBL-Mariner Linux Security Update for kernel 5.10.57.1
  • 900319 CBL-Mariner Linux Security Update for kernel 5.10.60.1
  • 901174 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (6571-1)
  • 903011 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (4158)
  • 906184 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (4158-1)

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