CVE-2021-38575

Exp

NetworkPkg/IScsiDxe has remotely exploitable buffer overflows.

Published: 2021-12-01 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-38575 is rated High Exploit Risk (75.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.87%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.34% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-38575

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-38575

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.53% 1.87% +1.34%
2 2026-03-25 0.64% 0.53% -0.11%
3 2026-02-19 — 0.64% —

Full EPSS history (20 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-38575

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2021-38575

OS Trackers for CVE-2021-38575

vendor priority summary link
alpine — CVE-2021-38575: 1 source package rows (edk2); 12 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.22-community, 3.23-community, edge-community); fixed 0, open 12. https://security.alpinelinux.org/vuln/CVE-2021-38575
debian not yet assigned CVE-2021-38575 not yet assigned priority: Debian including 1 source packages (edk2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2021-38575
redhat high — https://access.redhat.com/security/cve/CVE-2021-38575
suse high CVE-2021-38575 severity important: SUSE including 1 source package names (edk2-ovmf-20200602gitca407c7246bf-4.el8_4.2), 1 product×package rows across 1 product lines (SUSE Liberty Linux 8): Fixed 1. https://www.suse.com/security/cve/CVE-2021-38575/
ubuntu medium CVE-2021-38575 medium priority: Ubuntu including 1 source packages (edk2), 12 status rows across 12 suites (bionic, focal, hirsute, impish, jammy, kinetic, lunar, mantic, noble, trusty, upstream, xenial): not-affected 6, released 5, DNE 1. https://ubuntu.com/security/CVE-2021-38575

Affected software / configurations for CVE-2021-38575

Vendor Product Version Raw CPE
tianocore edk2 <= 202105 cpe:2.3:a:tianocore:edk2:*:*:*:*:*:*:*:*
insyde kernel 5.0 cpe:2.3:o:insyde:kernel:5.0:*:*:*:*:*:*:*
insyde kernel 5.1 cpe:2.3:o:insyde:kernel:5.1:*:*:*:*:*:*:*
insyde kernel 5.2 cpe:2.3:o:insyde:kernel:5.2:*:*:*:*:*:*:*
insyde kernel 5.3 cpe:2.3:o:insyde:kernel:5.3:*:*:*:*:*:*:*
insyde kernel 5.4 cpe:2.3:o:insyde:kernel:5.4:*:*:*:*:*:*:*
insyde kernel 5.5 cpe:2.3:o:insyde:kernel:5.5:*:*:*:*:*:*:*

References for CVE-2021-38575

cvelogic Threat Intelligence