CVE-2020-9391: Fedoraproject Fedora

Medium severity, CVSS 5.5. EPSS: 0.5% chance of exploitation in the next 30 days.

An issue was discovered in the Linux kernel 5.4 and 5.5 through 5.5.6 on the AArch64 architecture. It ignores the top byte in the address passed to the brk system call, potentially moving the memory break downwards when the application expects it to move upwards, aka CID-dcde237319e6. This has been observed to cause heap corruption with the GNU C Library malloc implementation.

Affected products

• Fedoraproject Fedora: version 31 only
• Linux Linux Kernel: from 5.5, up to and including 5.5.6; version 5.4 only
• Netapp Active Iq Unified Manager: affected versions not specified
• Netapp Cloud Backup: affected versions not specified
• Netapp Data Availability Services: affected versions not specified
• Netapp h410c Firmware: affected versions not specified
• Netapp Hci Management Node: affected versions not specified
• Netapp Solidfire: affected versions not specified
• Netapp Steelstore Cloud Integrated Storage: affected versions not specified

Published 2020-02-25. Last modified 2026-06-17.