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CVE-2026-85977

Libtirpc: libtirpc: denial of service via unbounded memory allocation during portmapper response decoding

A flaw was found in libtirpc. A remote attacker can exploit this vulnerability by sending specially crafted PMAPPROC_DUMP replies to a client application that uses the pmap_getmaps() function against an attacker-controlled host. This unbounded decoding can lead to excessive memory and CPU allocation, causing the client process to experience a Denial of Service (DoS) due to resource exhaustion.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Libtirpc Project Redhat
Products
Libtirpc Enterprise Linux Hardened Images and 5 more
CVE-2021-46828

libtirpc: DoS vulnerability with lots of connections

In libtirpc before 1.3.3rc1, remote attackers could exhaust the file descriptors of a process that uses libtirpc because idle TCP connections are mishandled. This can, in turn, lead to an svc_run infinite loop without accepting new connections.

CVSS 3.1 · 7.5 High EPSS 3.2% KEV · Not listed
Vendors
Debian Libtirpc Project Redhat
Products
Debian Linux Libtirpc Enterprise Linux
CVE-2017-8779

libntirpc: Memory leak when failing to parse XDR strings or bytearrays

rpcbind through 0.2.4, LIBTIRPC through 1.0.1 and 1.0.2-rc through 1.0.2-rc3, and NTIRPC through 1.4.3 do not consider the maximum RPC data size during memory allocation for XDR strings, which allows remote attackers to cause a denial of service (memory consumption with no subsequent free) via a crafted UDP packet to port 111, aka rpcbomb.

CVSS 3.0 · 7.5 High EPSS 81.2% KEV · Not listed
Vendors
Libtirpc Project Ntirpc Project Redhat and 1 more
Products
Libtirpc Ntirpc Ceph Storage and 3 more
CVE-2013-1950

libtirpc: invalid pointer free leads to rpcbind daemon crash

The svc_dg_getargs function in libtirpc 0.2.3 and earlier allows remote attackers to cause a denial of service (rpcbind crash) via a Sun RPC request with crafted arguments that trigger a free of an invalid pointer.

CVSS 2.0 · 4.3 Medium EPSS 6.5% KEV · Not listed
Vendors
Libtirpc Project Redhat
Products
Libtirpc Enterprise Linux
CVE-2018-14622

libtirpc: Segmentation fault in makefd_xprt return value in svc_vc.c

A null-pointer dereference vulnerability was found in libtirpc before version 0.3.3-rc3. The return value of makefd_xprt() was not checked in all instances, which could lead to a crash when the server exhausted the maximum number of available file descriptors. A remote attacker could cause an rpc-based application to crash by flooding it with new connections.

CVSS 3.1 · 7.5 High EPSS 3.9% KEV · Not listed
Vendors
Canonical Debian Libtirpc Project and 1 more
Products
Ubuntu Linux Debian Linux Libtirpc and 5 more
CVE-2018-14621

libtirpc: Infinite loop in EMFILE case in svc_vc.c

An infinite loop vulnerability was found in libtirpc before version 1.0.2-rc2. With the port to using poll rather than select, exhaustion of file descriptors would cause the server to enter an infinite loop, consuming a large amount of CPU time and denying service to other clients until restarted.

CVSS 3.0 · 5.3 Medium EPSS 2.3% KEV · Not listed
Vendors
Libtirpc Project
Products
Libtirpc