How severe is CVE-2024-28836?

CVE-2024-28836 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2024-28836 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-28836?

CVE-2024-28836 affects Trustedfirmware Mbed Tls. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-28836?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-28836 have an EU (EUVD) identifier?

Yes. CVE-2024-28836 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-25922.

When was CVE-2024-28836 published?

CVE-2024-28836 was published on 2024-04-03 and last updated on 2026-06-17.

CVE-2024-28836

CVE-2024-28836 is a medium-severity vulnerability in Trustedfirmware Mbed Tls with a CVSS 3.x base score of 5.4. 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-835.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-25922
Weakness: CWE-835
Affected product: Trustedfirmware Mbed Tls
Published: 2024-04-03
Last modified: 2026-06-17

Description

An issue was discovered in Mbed TLS 3.5.x before 3.6.0. When negotiating the TLS version on the server side, it can fall back to the TLS 1.2 implementation of the protocol if it is disabled. If the TLS 1.2 implementation was disabled at build time, a TLS 1.2 client could put a TLS 1.3-only server into an infinite loop processing a TLS 1.2 ClientHello, resulting in a denial of service. If the TLS 1.2 implementation was disabled at runtime, a TLS 1.2 client can successfully establish a TLS 1.2 connection with the server.

Frequently asked questions

What is CVE-2024-28836?: An issue was discovered in Mbed TLS 3.5.x before 3.6.0. When negotiating the TLS version on the server side, it can fall back to the TLS 1.2 implementation of the protocol if it is disabled. If the TLS 1.2 implementation was disabled at build time, a TLS 1.2 client could put a TLS 1.3-only server into an infinite loop processing a TLS 1.2 ClientHello, resulting in a denial of service. If the TLS 1.2 implementation was disabled at runtime, a TLS 1.2 client can successfully establish a TLS 1.2 connection with the server.
How severe is CVE-2024-28836?: CVE-2024-28836 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2024-28836 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-28836?: CVE-2024-28836 affects Trustedfirmware Mbed Tls. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-28836?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-28836 have an EU (EUVD) identifier?: Yes. CVE-2024-28836 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-25922.
When was CVE-2024-28836 published?: CVE-2024-28836 was published on 2024-04-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:*

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