Description
libnfs through 6.0.2 before 55c18ea does not validate a string size, leading to an integer overflow during a connection to a crafted NFS server. This occurs in libnfs_zdr_string in lib/libnfs-zdr.c.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| sahlberg | libnfs | — | — |
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 | libnfs | 5.0.2-1.1 | — |
| Debian 13 | libnfs | 5.0.2-1+deb13u1 | — |
| Debian 12 | libnfs | 4.0.0-1+deb12u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | libnfs | 5.0.2-1ubuntu1.1 | USN-8464-1 |
| Ubuntu 25.10 | libnfs | 5.0.2-1ubuntu0.25.10.1 | USN-8464-1 |
| Ubuntu 24.04 LTS | libnfs | 5.0.2-1ubuntu0.24.04.1 | USN-8464-1 |
| Ubuntu 22.04 LTS | libnfs | 4.0.0-1ubuntu0.1 | USN-8464-1 |
| Ubuntu 20.04 LTS | libnfs | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | libnfs | No fix yet | — |
| Ubuntu 16.04 LTS | libnfs | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | libnfs | 1.11.0-150000.3.3.1 | SUSE-SU-2026:2760-1 |
| SLES 15 SP6 | libnfs | 1.11.0-150000.3.3.1 | SUSE-SU-2026:2760-1 |
| SLES 15 SP5 | libnfs | 1.11.0-150000.3.3.1 | SUSE-SU-2026:2760-1 |
| SLES 15 SP4 | libnfs | 1.11.0-150000.3.3.1 | SUSE-SU-2026:2760-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | libnfs | 5.0.3-160000.4.1 | SUSE-SU-2026:22363-1 |
| SLES for SAP 15 SP6 | libnfs | 1.11.0-150000.3.3.1 | SUSE-SU-2026:2760-1 |
| SLES for SAP 15 SP5 | libnfs | 1.11.0-150000.3.3.1 | SUSE-SU-2026:2760-1 |
| SLES for SAP 15 SP4 | libnfs | 1.11.0-150000.3.3.1 | SUSE-SU-2026:2760-1 |
| SLES 16.0 | libnfs | 5.0.3-160000.4.1 | SUSE-SU-2026:22363-1 |
| SLE Micro 6.1 | libnfs | 5.0.2-slfo.1.1_2.1 | SUSE-SU-2026:22447-1 |
| SLE HPC 15 SP5 | libnfs | 1.11.0-150000.3.3.1 | SUSE-SU-2026:2760-1 |
| SLE HPC 15 SP4 | libnfs | 1.11.0-150000.3.3.1 | SUSE-SU-2026:2760-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libnfs | 6.0.2-1.1 | openSUSE-SU-2026:11246-1 |
| openSUSE Leap 16.0 | libnfs | 5.0.3-160000.4.1 | openSUSE-SU-2026:21055-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | libnfs +2 | 4.0.0-4.amzn2023.0.3 | ALAS2023-2026-1855 |
| Amazon Linux 2 | libnfs +2 | 1.11.0-1.amzn2.0.2 | ALAS2-2026-3367 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libnfs | 5.0.2-2 | — |
Advisories 8
- openSUSE-SU-2026:11246-1 libnfs-devel-6.0.2-1.1 on GA media SUSE / openSUSE Security Updates · Jul 11, 2026
- SUSE-SU-2026:2760-1 Security update for libnfs SUSE / openSUSE Security Updates · Jul 7, 2026
- SUSE-SU-2026:22447-1 Security update for libnfs SUSE / openSUSE Security Updates · Jul 4, 2026
- SUSE-SU-2026:22363-1 Security update for libnfs SUSE / openSUSE Security Updates · Jul 2, 2026
- openSUSE-SU-2026:21055-1 Security update for libnfs SUSE / openSUSE Security Updates · Jun 30, 2026
- USN-8464-1 libnfs vulnerability Ubuntu Security Notices (USN) · Jun 23, 2026
- ALAS2-2026-3367 Important: libnfs security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 22, 2026
- ALAS2023-2026-1855 Important: libnfs security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 22, 2026