Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Hardened Images | — | — |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 5 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libtirpc | No fix yet | — |
| Debian 13 | libtirpc | No fix yet | — |
| Debian 12 | libtirpc | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | ntirpc +1 | No fix yet | — |
| Ubuntu 26.04 LTS | ntirpc +1 | No fix yet | — |
| Ubuntu 24.04 LTS | ntirpc +1 | No fix yet | — |
| Ubuntu 22.04 LTS | ntirpc +1 | No fix yet | — |
| Ubuntu 20.04 LTS | ntirpc +1 | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | ntirpc +1 | No fix yet | — |
| Ubuntu 16.04 LTS | ntirpc +1 | No fix yet | — |
| Ubuntu 14.04 LTS | libtirpc | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | libtirpc +1 | 1.3.8-0.1.hum1 | RHSA-2026:80360 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libtirpc | 1.3.8-1.1 | openSUSE-SU-2026:12244-1 |
Advisories 2
- openSUSE-SU-2026:12244-1 libtirpc-devel-1.3.8-1.1 on GA media SUSE / openSUSE Security Updates · Oct 24, 2026
- RHSA-2026:80360 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 18, 2026
References
- RHSA-2026:80360 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-85977 vdb-entry
- RHBZ#2478979 issue-tracking