Medium severity · published Sep 5, 2026
CVE-2026-18313
rpcapd memory leak in libpcap before 1.10.7
4.3
CVSS
0.2%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libpcap · The Tcpdump Group
1.9.x; 1.10.x before 1.10.7 · source: vendor
Affected product
LI
libpcap
The Tcpdump Group
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