CVE-2026-18313 — MEDIUM (4.3)

Vulnerability Description

rpcapd can allocate up to 65536 bytes per each RPCAP_MSG_UPDATEFILTER_REQ or RPCAP_MSG_STARTCAP_REQ message received from the client, but it never frees the memory, so it leaks memory even under normal use. A malicious client can cause the server to leak memory substantially faster.

CVSS Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

LOW

Related Weaknesses (CWE)

CWE-401

References

https://github.com/the-tcpdump-group/libpcap/commit/f9775af1a0ec76db60c7213241e6

FAQ

What is CVE-2026-18313?

CVE-2026-18313 is a vulnerability with a CVSS score of 4.3 (MEDIUM). rpcapd can allocate up to 65536 bytes per each RPCAP_MSG_UPDATEFILTER_REQ or RPCAP_MSG_STARTCAP_REQ message received from the client, but it never frees the memory, so it leaks memory even under norma...

How severe is CVE-2026-18313?

CVE-2026-18313 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-18313?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.