01 Record

CVE-2021-3600

It was discovered that the eBPF implementation in the Linux kernel did not properly track bounds information for 32 bit registers when performing div and mod operations. A local attacker could use

HighPUBLISHEDCNA: canonical

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

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02 Description

It was discovered that the eBPF implementation in the Linux kernel did not properly track bounds information for 32 bit registers when performing div and mod operations. A local attacker could use

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.28% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 20.5% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2024-01-08 18:16Z2 YR AGO

Last updated

2024-09-04 15:38Z2 YR AGO

Reserved

2021-06-12

Assigning CNA

canonical

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

CWE-125Out-of-bounds ReadBase
CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

815af8b001ad327d6c157d792e7c23668029d08893fc8fe3425a86e7acc0c231

05 Affected products

VendorProductVersionsPlatforms

The Linux Kernel Organizationlinux0 to < 5.11Linux

06 References

cve.mitre.orghttps://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3600issue-tracking
ubuntu.comhttps://ubuntu.com/security/notices/USN-5003-1third-party-advisory
git.kernel.orghttps://git.kernel.org/linus/e88b2c6e5a4d9ce30d75391e4d950da74bb2bd90issue-tracking

07 Fixed in

AlmaLinux 8

kernel-tools-libs-devel
Fixed in 4.18.0-348.el8

CloudLinux 8

kernel-tools-libs-devel
Fixed in 4.18.0-348.el8

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Debian 12

linux
Fixed in 5.10.19-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 5.10.19-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 5.10.19-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.