UBUNTU-CVE-2020-6096

Advisory lineage Upstream: 1 Downstream: 2
Upstream
CVE-2020-6096
Published: 01 Apr 2020, 22:15
Last modified:22 Apr 2026, 12:43

Vulnerability Summary

Overall Risk (default)
medium
32/100
CVSS Score
8.1 HIGH
3.1 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

01 Apr 2020, 22:15
Published
Vulnerability first disclosed
22 Apr 2026, 12:43
Last Modified
Vulnerability information updated

Description

An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the 'num' parameter results in a signed comparison vulnerability. If an attacker underflows the 'num' parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data.

CVSS Metrics

  • v3.1•HIGH•Score: 8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  • v3.0•HIGH•Score: 8.1CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Systems

  • ubuntu•eglibc

    all

  • ubuntu•glibc

    < 2.23-0ubuntu11.3 | < 2.27-3ubuntu1.5 | < 2.31-0ubuntu9.7

References (5)