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Vulnerability Details :

CVE-2021-33624

Summary
Assigner-mitre
Assigner Org ID-8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At-23 Jun, 2021 | 15:37
Updated At-03 Aug, 2024 | 23:58
Rejected At-
Credits

In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:mitre
Assigner Org ID:8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At:23 Jun, 2021 | 15:37
Updated At:03 Aug, 2024 | 23:58
Rejected At:
▼CVE Numbering Authority (CNA)

In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.

Affected Products
Vendor
n/a
Product
n/a
Versions
Affected
  • n/a
Problem Types
TypeCWE IDDescription
textN/An/a
Type: text
CWE ID: N/A
Description: n/a
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner
x_refsource_MISC
http://www.openwall.com/lists/oss-security/2021/06/21/1
x_refsource_CONFIRM
https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db
x_refsource_CONFIRM
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
mailing-list
x_refsource_MLIST
Hyperlink: https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner
Resource:
x_refsource_MISC
Hyperlink: http://www.openwall.com/lists/oss-security/2021/06/21/1
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db
Resource:
x_refsource_CONFIRM
Hyperlink: https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
Resource:
mailing-list
x_refsource_MLIST
▼Authorized Data Publishers (ADP)
CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner
x_refsource_MISC
x_transferred
http://www.openwall.com/lists/oss-security/2021/06/21/1
x_refsource_CONFIRM
x_transferred
https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db
x_refsource_CONFIRM
x_transferred
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
mailing-list
x_refsource_MLIST
x_transferred
Hyperlink: https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner
Resource:
x_refsource_MISC
x_transferred
Hyperlink: http://www.openwall.com/lists/oss-security/2021/06/21/1
Resource:
x_refsource_CONFIRM
x_transferred
Hyperlink: https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db
Resource:
x_refsource_CONFIRM
x_transferred
Hyperlink: https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
Resource:
mailing-list
x_refsource_MLIST
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:cve@mitre.org
Published At:23 Jun, 2021 | 16:15
Updated At:08 Aug, 2023 | 14:22

In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.14.7MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Primary2.04.7MEDIUM
AV:L/AC:M/Au:N/C:C/I:N/A:N
Type: Primary
Version: 3.1
Base score: 4.7
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Type: Primary
Version: 2.0
Base score: 4.7
Base severity: MEDIUM
Vector:
AV:L/AC:M/Au:N/C:C/I:N/A:N
CPE Matches

Linux Kernel Organization, Inc
linux
>>linux_kernel>>Versions before 5.12.13(exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Debian GNU/Linux
debian
>>debian_linux>>9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-843Primarynvd@nist.gov
CWE ID: CWE-843
Type: Primary
Source: nvd@nist.gov
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
http://www.openwall.com/lists/oss-security/2021/06/21/1cve@mitre.org
Mailing List
Exploit
Third Party Advisory
https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49dbcve@mitre.org
Patch
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlcve@mitre.org
Issue Tracking
Third Party Advisory
https://www.usenix.org/conference/usenixsecurity21/presentation/kirznercve@mitre.org
Third Party Advisory
Hyperlink: http://www.openwall.com/lists/oss-security/2021/06/21/1
Source: cve@mitre.org
Resource:
Mailing List
Exploit
Third Party Advisory
Hyperlink: https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db
Source: cve@mitre.org
Resource:
Patch
Third Party Advisory
Hyperlink: https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
Source: cve@mitre.org
Resource:
Issue Tracking
Third Party Advisory
Hyperlink: https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner
Source: cve@mitre.org
Resource:
Third Party Advisory

Change History

0
Information is not available yet

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Matching Score-6
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||
7 Day CHG~0.00%
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Rejected-Not Available
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Action-Not Available
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Product-chrome_oslinux_kernelflash_player_desktop_runtimewindows_8.1windowswindows_10flash_playermac_os_xAdobe Flash Player 24.0.0.194 and earlier.
CWE ID-CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CVE-2021-34866
Matching Score-6
Assigner-Zero Day Initiative
ShareView Details
Matching Score-6
Assigner-Zero Day Initiative
CVSS Score-8.8||HIGH
EPSS-0.13% / 33.68%
||
7 Day CHG~0.00%
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Updated-04 Aug, 2024 | 00:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.14-rc3. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs, which can result in a type confusion condition. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. Was ZDI-CAN-14689.

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CWE ID-CWE-843
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Matching Score-6
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-6
Assigner-Red Hat, Inc.
CVSS Score-4.6||MEDIUM
EPSS-0.02% / 3.20%
||
7 Day CHG-0.00%
Published-14 Nov, 2022 | 00:00
Updated-30 Apr, 2025 | 20:15
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

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Action-Not Available
Vendor-n/aLinux Kernel Organization, Inc
Product-linux_kernelKernel
CWE ID-CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CVE-2024-49860
Matching Score-6
Assigner-kernel.org
ShareView Details
Matching Score-6
Assigner-kernel.org
CVSS Score-7.1||HIGH
EPSS-0.05% / 13.32%
||
7 Day CHG~0.00%
Published-21 Oct, 2024 | 12:27
Updated-04 May, 2025 | 09:39
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
ACPI: sysfs: validate return type of _STR method

In the Linux kernel, the following vulnerability has been resolved: ACPI: sysfs: validate return type of _STR method Only buffer objects are valid return values of _STR. If something else is returned description_show() will access invalid memory.

Action-Not Available
Vendor-Linux Kernel Organization, Inc
Product-linux_kernelLinux
CWE ID-CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CVE-2020-6512
Matching Score-6
Assigner-Chrome
ShareView Details
Matching Score-6
Assigner-Chrome
CVSS Score-8.8||HIGH
EPSS-4.25% / 88.34%
||
7 Day CHG~0.00%
Published-22 Jul, 2020 | 16:16
Updated-04 Aug, 2024 | 09:02
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Type Confusion in V8 in Google Chrome prior to 84.0.4147.89 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Action-Not Available
Vendor-Google LLCopenSUSEFedora ProjectDebian GNU/Linux
Product-debian_linuxchromefedorabackports_sleleapChrome
CWE ID-CWE-787
Out-of-bounds Write
CWE ID-CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CVE-2020-6382
Matching Score-6
Assigner-Chrome
ShareView Details
Matching Score-6
Assigner-Chrome
CVSS Score-8.8||HIGH
EPSS-2.90% / 85.81%
||
7 Day CHG~0.00%
Published-11 Feb, 2020 | 14:42
Updated-04 Aug, 2024 | 09:02
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Type confusion in JavaScript in Google Chrome prior to 80.0.3987.87 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Action-Not Available
Vendor-Debian GNU/LinuxRed Hat, Inc.Fedora ProjectGoogle LLCopenSUSESUSE
Product-enterprise_linux_serverdebian_linuxchromelinux_enterpriseenterprise_linux_workstationfedorapackage_hubbackports_sleenterprise_linux_desktopChrome
CWE ID-CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CVE-2017-5070
Matching Score-6
Assigner-Chrome
ShareView Details
Matching Score-6
Assigner-Chrome
CVSS Score-8.8||HIGH
EPSS-72.45% / 98.70%
||
7 Day CHG-2.08%
Published-27 Oct, 2017 | 05:00
Updated-30 Jul, 2025 | 01:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Known KEV||Action Due Date - 2022-06-22||Apply updates per vendor instructions.

Type confusion in V8 in Google Chrome prior to 59.0.3071.86 for Linux, Windows, and Mac, and 59.0.3071.92 for Android, allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page.

Action-Not Available
Vendor-n/aMicrosoft CorporationApple Inc.Red Hat, Inc.Google LLCLinux Kernel Organization, Inc
Product-chromeenterprise_linux_desktopenterprise_linux_workstationlinux_kernelwindowsenterprise_linux_servermacosandroidGoogle Chrome prior to 59.0.3071.86 for Linux, Windows and Mac, and 59.0.3071.92 for AndroidChromium V8
CWE ID-CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
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