CVE-2021-3600

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 this to possibly execute arbitrary code.

CVSS Metrics

• v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
• v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.16%• Percentile: 37%

Techniques & Countermeasures

• CWE-125•Out-of-bounds Read

  The product reads data past the end, or before the beginning, of the intended buffer.

• CWE-787•Out-of-bounds Write

  The product writes data past the end, or before the beginning, of the intended buffer.

Affected Systems

• canonical•ubuntu_linux

  14.04 | 16.04 | 18.04

• fedoraproject•fedora

  34

• linux•linux_kernel

  ≥ 4.14.115, < 4.14.308 | ≥ 4.15, < 4.19.206 | ≥ 4.20, < 5.4.98 | ≥ 5.5, < 5.10.16 | 5.11:rc1 | 5.11:rc2 | 5.11:rc3 | 5.11:rc4 | 5.11:rc5 | 5.11:rc6 | 5.11:rc7

• redhat•enterprise_linux

  8.0

• the linux kernel organization•linux

  < 5.11

References (3)

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3600
• https://ubuntu.com/security/notices/USN-5003-1
• https://git.kernel.org/linus/e88b2c6e5a4d9ce30d75391e4d950da74bb2bd90