Integer underflow in Valkey - CVE-2025-49112
Published: November 27, 2025
Vulnerability identifier: #VU118804
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-49112
CWE-ID: CWE-191
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Valkey
Affected software:
Valkey
Valkey
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service attack.
The vulnerability exists due to an integer underflow within the setDeferredReply() function in networking.c. A remote attacker can send a specially crafted request to the affected application, trigger an integer underflow and perform a denial of service attack.
How to mitigate CVE-2025-49112
Install updates from vendor's website.