PatchTheCVECVE-2018-14621: An infinite loop vulnerability was found in libtirpc before version 1.0.2-rc2
CVE-2018-14621 is a medium-severity flaw (CVSS 5.3) affecting libtirpc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 2.3% (top 17%) |
| CISA exploited list | No |
| Weakness | CWE-835 |
| Published | 2018-08-30 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2018-14621?
libtirpc: upgrade to newer than 1.0.1. Exact commands for each OS are on this page.
Is CVE-2018-14621 being exploited?
CVE-2018-14621 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2018-14621 affect?
CVE-2018-14621 affects libtirpc. Severity is medium (CVSS 5.3). 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
How urgent is CVE-2018-14621?
Priority 44/100. Remotely exploitable, no login, no user action
Related CVEs
- CVE-2021-46828 HIGH 7.5 UPGRADE MITIGATE In libtirpc before 1.3.3rc1, remote attackers could exhaust the file descriptors of a process that uses libtir
- CVE-2018-14622 HIGH 7.5 UPGRADE MITIGATE A null-pointer dereference vulnerability was found in libtirpc before version 0.3.3-rc3
- CVE-2017-8779 HIGH 7.5 UPGRADE UPGRADE 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
- CVE-2013-1950 MEDIUM 4.3 UPGRADE The svc_dg_getargs function in libtirpc 0.2.3 and earlier allows remote attackers to cause a denial of service