CVE-2021-20255

A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

• CWE-835
• CWE-674

• https://bugzilla.redhat.com/show_bug.cgi?id=1930646Issue Tracking, Patch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/04/msg00009.htmlMailing List, Third Party Advisory
• https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Feepro100_stackoverflow1Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210507-0003/Third Party Advisory
• https://www.openwall.com/lists/oss-security/2021/02/25/1Mailing List, Patch, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1930646Issue Tracking, Patch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/04/msg00009.htmlMailing List, Third Party Advisory
• https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Feepro100_stackoverflow1Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210507-0003/Third Party Advisory
• https://www.openwall.com/lists/oss-security/2021/02/25/1Mailing List, Patch, Third Party Advisory

Published

Mar 9, 2021

Last Modified

Jun 17, 2026

Status

Modified

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