CVE Vulnerabilities

CVE-2020-15859

Use After Free

Published: Jul 21, 2020 | Modified: Nov 21, 2024
CVSS 3.x
3.3
LOW
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS 2.x
2.1 LOW
AV:L/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
3.8 MODERATE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
Ubuntu
MEDIUM

QEMU 4.2.0 has a use-after-free in hw/net/e1000e_core.c because a guest OS user can trigger an e1000e packet with the datas address set to the e1000es MMIO address.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Name Vendor Start Version End Version
Qemu Qemu 4.2.0 (including) 4.2.0 (including)
Red Hat Enterprise Linux 8 RedHat virt-devel:rhel-8050020211001230723.b4937e53 *
Red Hat Enterprise Linux 8 RedHat virt:rhel-8050020211001230723.b4937e53 *
Qemu Ubuntu bionic *
Qemu Ubuntu esm-infra-legacy/trusty *
Qemu Ubuntu esm-infra/bionic *
Qemu Ubuntu esm-infra/focal *
Qemu Ubuntu esm-infra/xenial *
Qemu Ubuntu focal *
Qemu Ubuntu groovy *
Qemu Ubuntu trusty *
Qemu Ubuntu trusty/esm *
Qemu Ubuntu upstream *
Qemu Ubuntu xenial *
Qemu-kvm Ubuntu precise/esm *

Potential Mitigations

References