Description
Stack-based buffer overflow in the clntudp_call function in sunrpc/clnt_udp.c in the GNU C Library (aka glibc or libc6) allows remote servers to cause a denial of service (crash) or possibly unspecified other impact via a flood of crafted ICMP and UDP packets.
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 | glibc | 2.22-10 | — |
| Debian 14 | libtirpc | 0.2.5-1.1 | — |
| Debian 13 | glibc | 2.22-10 | — |
| Debian 13 | libtirpc | 0.2.5-1.1 | — |
| Debian 12 | glibc | 2.22-10 | — |
| Debian 12 | libtirpc | 0.2.5-1.1 | — |
| Debian 8 | libtirpc | 0.2.5-1+deb8u3 | DLA-2256-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | libtirpc | 0.2.5-1.2ubuntu0.1 | USN-3759-1 |
| Ubuntu 16.04 LTS | glibc | 2.23-0ubuntu6 | USN-3239-1 |
| Ubuntu 16.04 LTS | libtirpc | 0.2.5-1ubuntu0.1 | USN-3759-1 |
| Ubuntu 14.04 LTS | eglibc | 2.19-0ubuntu6.10 | USN-3239-1 |
| Ubuntu 14.04 LTS | libtirpc | 0.2.2-5ubuntu2.1 | USN-3759-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | glibc | 2.19-38.2 | SUSE-SU-2016:1733-1 |
| SLES 12 | glibc | 2.19-22.16.2 | SUSE-SU-2016:1721-1 |
| SLES 11 SP4 | glibc | 2.11.3-17.102.1 | SUSE-SU-2016:2156-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | glibc | 2.19-38.2 | SUSE-SU-2016:1733-1 |
| SLES for SAP 12 | glibc | 2.19-22.16.2 | SUSE-SU-2016:1721-1 |
| SLES for SAP 11 SP4 | glibc | 2.11.3-17.102.1 | SUSE-SU-2016:2156-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | glibc | 2.24-2.3 | openSUSE-SU-2024:10154-1 |
Advisories 7
- USN-3759-1 libtirpc vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-3239-1 eglibc, glibc vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-2256-1 libtirpc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10154-1 glibc-2.24-2.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1721-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1733-1 Security update for glibc SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2016:2156-1 Security update for glibc SUSE / openSUSE Security Updates · May 2, 2025
References
- USN-3759-2 vendor-advisory
- openSUSE-SU-2016:1779 vendor-advisory
- USN-3759-1 vendor-advisory
- openSUSE-SU-2016:1527 vendor-advisory
- 102073 vdb-entry
- [debian-lts-announce] 20200628 [SECURITY] [DLA 2256-1] libtirpc security update mailing-list
- http://www-01.ibm.com/support/docview.wss?uid=swg21995039
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://sourceware.org/bugzilla/show_bug.cgi?id=20112
- https://source.android.com/security/bulletin/2017-12-01
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=bc779a1a5b3035133024b21e2f339fe4219fb11c