CVE-2020-9391

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-787

Affected software

No affected versions have been published.

Timeline

Published: Feb 25, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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