How severe is CVE-2019-15134?

CVE-2019-15134 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-2019-15134 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-15134?

CVE-2019-15134 affects Riot-os Riot. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-15134?

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-2019-15134 published?

CVE-2019-15134 was published on 2019-08-17 and last updated on 2026-06-17.

CVE-2019-15134

CVE-2019-15134 is a high-severity vulnerability in Riot-os Riot 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-401.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-401
Affected product: Riot-os Riot
Published: 2019-08-17
Last modified: 2026-06-17

Description

RIOT through 2019.07 contains a memory leak in the TCP implementation (gnrc_tcp), allowing an attacker to consume all memory available for network packets and thus effectively stopping all network threads from working. This is related to _receive in sys/net/gnrc/transport_layer/tcp/gnrc_tcp_eventloop.c upon receiving an ACK before a SYN.

Frequently asked questions

What is CVE-2019-15134?: RIOT through 2019.07 contains a memory leak in the TCP implementation (gnrc_tcp), allowing an attacker to consume all memory available for network packets and thus effectively stopping all network threads from working. This is related to _receive in sys/net/gnrc/transport_layer/tcp/gnrc_tcp_eventloop.c upon receiving an ACK before a SYN.
How severe is CVE-2019-15134?: CVE-2019-15134 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-2019-15134 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-15134?: CVE-2019-15134 affects Riot-os Riot. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-15134?: 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-2019-15134 published?: CVE-2019-15134 was published on 2019-08-17 and last updated on 2026-06-17.

References

https://github.com/RIOT-OS/RIOT/pull/12001

Affected products (1)

cpe:2.3:o:riot-os:riot:*:*:*:*:*:*:*:*

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