HIGH

CVE-2026-54873

CVSS v3

7.5

HIGH

EPSS Score

0.5 %

exploit probability, as of 2026-10-01

CISA KEV

known exploited

Exploitation

—

SSVC status

Description

Issue summary: QUIC process may keep memory for QUIC packet buffer for much longer period than necessary. Impact summary: Remote peer can exploit this vulnerability by sending maliciously crafted packets, making the local QUIC stack to keep the memory for packet buffers allocated. The time for which the memory remains allocated is entirely under the control of the potentially malicious remote peer. CWE: CWE-770: Allocation of Resources Without Limits or Throttling Description: To save copy op

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2026-09-29
Last Modified: 2026-09-30

Frequently asked questions

What is CVE-2026-54873?

Is CVE-2026-54873 actively exploited?

Active exploitation of CVE-2026-54873 has not been confirmed. Its EPSS score was 0.5% on 2026-10-01, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-54873?

CVE-2026-54873 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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