Is CVE-2021-38575 in the CISA KEV catalog?

No. CVE-2021-38575 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-38575?

CVE-2021-38575 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2021-38575?

CVE-2021-38575 has an EPSS score of 1.85% (77th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-38575?

Upgrade edk2 on debian 11 to 2020.11-2+deb11u3 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2021-38575

HIGHEPSS 77th pctl

8.1

CVSS v3

NVD

Description

NetworkPkg/IScsiDxe has remotely exploitable buffer overflows.

CWE-124 CWE-119Buffer Overflow

How to fix

Remediation Available

edk2Debian

Fixed in:2020.11-2+deb11u3CVE-2021-38575

Fixed in:2021.08-1CVE-2021-38575

edk2Ubuntu

Fixed in:0~20160408.ffea0a2c-2ubuntu0.2+esm3USN-7060-1

Fixed in:0~20180205.c0d9813c-2ubuntu0.3+esm2USN-7060-1

Fixed in:0~20191122.bd85bf54-2ubuntu3.6USN-7060-1

Fixed in:0~20191122.bd85bf54-2ubuntu3.3USN-5088-1

Fixed in:2022.02-3ubuntu0.22.04.3USN-7060-1

ovmfUbuntu

Fixed in:0~20160408.ffea0a2c-2ubuntu0.2+esm3USN-7060-1

Fixed in:0~20180205.c0d9813c-2ubuntu0.3+esm2USN-7060-1

Fixed in:0~20191122.bd85bf54-2ubuntu3.3USN-5088-1

Fixed in:0~20191122.bd85bf54-2ubuntu3.6USN-7060-1

Fixed in:2022.02-3ubuntu0.22.04.3USN-7060-1

ovmf-ia32Ubuntu

Fixed in:2022.02-3ubuntu0.22.04.3USN-7060-1

qemu-efiUbuntu

Fixed in:0~20160408.ffea0a2c-2ubuntu0.2+esm3USN-7060-1

Fixed in:0~20191122.bd85bf54-2ubuntu3.3USN-5088-1

qemu-efi-aarch64Ubuntu

Fixed in:0~20180205.c0d9813c-2ubuntu0.3+esm2USN-7060-1

Fixed in:0~20191122.bd85bf54-2ubuntu3.6USN-7060-1

Fixed in:0~20191122.bd85bf54-2ubuntu3.3USN-5088-1

Fixed in:2022.02-3ubuntu0.22.04.3USN-7060-1

qemu-efi-armUbuntu

Fixed in:0~20180205.c0d9813c-2ubuntu0.3+esm2USN-7060-1

Fixed in:0~20191122.bd85bf54-2ubuntu3.3USN-5088-1

Fixed in:0~20191122.bd85bf54-2ubuntu3.6USN-7060-1

Fixed in:2022.02-3ubuntu0.22.04.3USN-7060-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.85%probability of exploitation in 30 days

77thpercentile

Elevated risk: more likely to be exploited than 77% of all known CVEs.

References

Exploit1

bugzilla.tianocore.org

Third-Party Advisory1

insyde.com

Other references1

lists.debian.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-03.