How severe is CVE-2021-39295?

CVE-2021-39295 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-39295 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39295?

CVE-2021-39295 affects Openbmc-project Openbmc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-39295?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-39295 published?

CVE-2021-39295 was published on 2023-04-15 and last updated on 2026-06-17.

CVE-2021-39295

CVE-2021-39295 is a high-severity vulnerability in Openbmc-project Openbmc with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Openbmc-project Openbmc
Published: 2023-04-15
Last modified: 2026-06-17

Description

In OpenBMC 2.9, crafted IPMI messages allow an attacker to cause a denial of service to the BMC via the netipmid (IPMI lan+) interface.

Frequently asked questions

What is CVE-2021-39295?: In OpenBMC 2.9, crafted IPMI messages allow an attacker to cause a denial of service to the BMC via the netipmid (IPMI lan+) interface.
How severe is CVE-2021-39295?: CVE-2021-39295 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-39295 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-39295?: CVE-2021-39295 affects Openbmc-project Openbmc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-39295?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-39295 published?: CVE-2021-39295 was published on 2023-04-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openbmc-project:openbmc:2.9.0:-:*:*:*:*:*:*

More vulnerabilities in Openbmc-project Openbmc

CVE-2021-39296 — Critical (CVSS 10.0): In OpenBMC 2.9, crafted IPMI messages allow an attacker to bypass authentication and gain full control of the system.
CVE-2020-14156 — High (CVSS 8.8): user_channel/passwd_mgr.cpp in OpenBMC phosphor-host-ipmid before 2020-04-03 does not ensure that /etc/ipmi-pass has…
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CVE-2022-35729 — High (CVSS 7.5): Out of bounds read in firmware for OpenBMC in some Intel(R) platforms before version 0.72 may allow unauthenticated…

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