CVE-2020-17380

Severity: medium (CVSS 6.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-01-30 · updated 2026-06-17
Weakness: CWE-787

Description

A heap-based buffer overflow was found in QEMU through 5.0.0 in the SDHCI device emulation support. It could occur while doing a multi block SDMA transfer via the sdhci_sdma_transfer_multi_blocks() routine in hw/sd/sdhci.c. A guest user or process could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition, or potentially execute arbitrary code with privileges of the QEMU process on the host.

Affected products

Debian Linux: 9.0
QEMU: through 5.0.0

References

http://www.openwall.com/lists/oss-security/2021/03/09/1
https://bugzilla.redhat.com/show_bug.cgi?id=1862167
https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html
https://lists.nongnu.org/archive/html/qemu-devel/2020-09/msg01175.html
https://security.netapp.com/advisory/ntap-20210312-0003/
http://www.openwall.com/lists/oss-security/2021/03/09/1
https://bugzilla.redhat.com/show_bug.cgi?id=1862167
https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html
https://lists.nongnu.org/archive/html/qemu-devel/2020-09/msg01175.html
https://security.netapp.com/advisory/ntap-20210312-0003/

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