Description
ZDR decoding in libnfs through 6.0.2 before 7613236 has an out-of-bounds write related to lib/libnfs-zdr.c with libnfs_zdr_bytes(), libnfs_zdr_string(), and libnfs_zdr_array(). The caller-supplied maxsize value is not honored.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| sahlberg | libnfs | ≤ 6.0.2 | — |
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 | No fix yet | — |
| Debian 13 | libnfs | No fix yet | — |
| Debian 12 | libnfs | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libnfs | 5.0.2-1ubuntu3.1 | USN-9008-1 |
| Ubuntu 26.04 LTS | libnfs | 5.0.2-1ubuntu1.2 | USN-9008-1 |
| Ubuntu 24.04 LTS | libnfs | 5.0.2-1ubuntu0.24.04.2 | USN-9008-1 |
| Ubuntu 22.04 LTS | libnfs | 4.0.0-1ubuntu0.2 | USN-9008-1 |
| 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 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libnfs | 6.0.2-2.1 | openSUSE-SU-2026:12400-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libnfs | 5.0.2-3 | — |
Advisories 2
- USN-9008-1 libnfs vulnerability Ubuntu Security Notices (USN) · Nov 10, 2026
- openSUSE-SU-2026:12400-1 libnfs-devel-6.0.2-2.1 on GA media SUSE / openSUSE Security Updates · Nov 4, 2026