Description
nbd-server.c in Network Block Device (nbd-server) before 3.11 does not properly handle signals, which allows remote attackers to cause a denial of service (deadlock) via unspecified vectors.
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 | nbd | 1:3.10-1 | — |
| Debian 13 | nbd | 1:3.10-1 | — |
| Debian 12 | nbd | 1:3.10-1 | — |
| Debian 8 | nbd | 1:3.8-4+deb8u1 | DSA-3271-1 |
| Debian 7 | nbd | 1:3.2-4~deb7u5 | DSA-3271-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 6.0 | nbd | 1:2.9.16-8+squeeze2 | DLA-223-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | nbd | 1:3.7-1ubuntu0.1 | USN-2676-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | nbd | 3.13-3.5 | openSUSE-SU-2024:10573-1 |
Advisories 4
- DLA-223-1 nbd - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3271-1 nbd - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2676-1 nbd vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- openSUSE-SU-2024:10573-1 nbd-3.13-3.5 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- DSA-3271 vendor-advisory
- [Nbd] 20150507 [PATCH] nbd-server: fix unsafe signal handling mailing-list
- USN-2676-1 vendor-advisory
- openSUSE-SU-2015:0994 vendor-advisory
- http://sourceforge.net/projects/nbd/files/nbd/3.11/
- [oss-security] 20150507 CVE-2015-0847 in nbd-server mailing-list