{"id":"UBUNTU-CVE-2020-6096","details":"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.","modified":"2026-04-22T14:27:04.252011Z","published":"2020-04-01T22:15:00Z","related":["USN-4954-1","USN-5310-1"],"upstream":["CVE-2020-6096"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-6096"},{"type":"REPORT","url":"https://talosintelligence.com/vulnerability_reports/TALOS-2020-1019"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4954-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5310-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-6096"}],"affected":[{"package":{"name":"eglibc","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/eglibc@2.19-0ubuntu6.15+esm4?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.17-93ubuntu4","2.18-0ubuntu1","2.18-0ubuntu2","2.18-0ubuntu4","2.18-0ubuntu5","2.18-0ubuntu6","2.18-0ubuntu7","2.19-0ubuntu2","2.19-0ubuntu3","2.19-0ubuntu4","2.19-0ubuntu5","2.19-0ubuntu6","2.19-0ubuntu6.1","2.19-0ubuntu6.3","2.19-0ubuntu6.4","2.19-0ubuntu6.5","2.19-0ubuntu6.6","2.19-0ubuntu6.7","2.19-0ubuntu6.8","2.19-0ubuntu6.9","2.19-0ubuntu6.10","2.19-0ubuntu6.11","2.19-0ubuntu6.13","2.19-0ubuntu6.14","2.19-0ubuntu6.15","2.19-0ubuntu6.15+esm1","2.19-0ubuntu6.15+esm2","2.19-0ubuntu6.15+esm3","2.19-0ubuntu6.15+esm4"],"ecosystem_specific":{"binaries":[{"binary_version":"2.19-0ubuntu6.15+esm4","binary_name":"eglibc-source"},{"binary_version":"2.19-0ubuntu6.15+esm4","binary_name":"libc-bin"},{"binary_version":"2.19-0ubuntu6.15+esm4","binary_name":"libc-dev-bin"},{"binary_version":"2.19-0ubuntu6.15+esm4","binary_name":"libc6"},{"binary_version":"2.19-0ubuntu6.15+esm4","binary_name":"libc6-amd64"},{"binary_version":"2.19-0ubuntu6.15+esm4","binary_name":"libc6-armel"},{"binary_version":"2.19-0ubuntu6.15+esm4","binary_name":"libc6-dev-amd64"},{"binary_version":"2.19-0ubuntu6.15+esm4","binary_name":"libc6-dev-armel"},{"binary_version":"2.19-0ubuntu6.15+esm4","binary_name":"libc6-dev-i386"},{"binary_version":"2.19-0ubuntu6.15+esm4","binary_name":"libc6-dev-x32"},{"binary_version":"2.19-0ubuntu6.15+esm4","binary_name":"libc6-i386"},{"binary_version":"2.19-0ubuntu6.15+esm4","binary_name":"libc6-pic"},{"binary_version":"2.19-0ubuntu6.15+esm4","binary_name":"libc6-prof"},{"binary_version":"2.19-0ubuntu6.15+esm4","binary_name":"libc6-x32"},{"binary_version":"2.19-0ubuntu6.15+esm4","binary_name":"multiarch-support"},{"binary_version":"2.19-0ubuntu6.15+esm4","binary_name":"nscd"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-6096.json"}},{"package":{"name":"glibc","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/glibc@2.23-0ubuntu11.3?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.23-0ubuntu11.3"}]}],"versions":["2.21-0ubuntu4","2.21-0ubuntu5","2.21-0ubuntu6","2.23-0ubuntu1","2.23-0ubuntu2","2.23-0ubuntu3","2.23-0ubuntu4","2.23-0ubuntu5","2.23-0ubuntu6","2.23-0ubuntu7","2.23-0ubuntu9","2.23-0ubuntu10","2.23-0ubuntu11","2.23-0ubuntu11.2"],"ecosystem_specific":{"availability":"No 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