nbd-client: In nbd-server in nbd before 3.24, there is an integer overflow with aresultant heap-based buffer overflow
CVE-2022-26495 is fixed in 3 products on 1 platform, first by nbd-client 1:3.16.2-1ubuntu0.2, released March 5, 2022. It is not reported as exploited. Patch Radar priority: High.
In nbd-server in nbd before 3.24, there is an integer overflow with aresultant heap-based buffer overflow. A value of 0xffffffff in the namelength field will cause a zero-sized buffer to be allocated for the name,resulting in a write to a dangling pointer. This issue exists for theNBD_OPT_INFO, NBD_OPT_GO, and NBD_OPT_EXPORT_NAME messages.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| nbd · Debian 11.6 (bullseye) | 1:3.21-1+deb11u1 | DSA-5100-1 | Mar 12, 2022 |
| nbd · Debian 12.15 (bookworm) | 1:3.24-1 | DEBIAN-CVE-2022-26495 | Mar 6, 2022 |
| nbd · Debian 13.5 (trixie) | 1:3.24-1 | DEBIAN-CVE-2022-26495 | Mar 6, 2022 |
| nbd · Debian 14 | 1:3.24-1 | DEBIAN-CVE-2022-26495 | Mar 6, 2022 |
| nbd-client · Ubuntu 18.04.6 LTS (bionic) | 1:3.16.2-1ubuntu0.2 | nbd-client 1:3.16.2-1ubuntu0.2 | Mar 5, 2022 |
| nbd-client · Ubuntu 20.04 LTS (focal) | 1:3.20-1ubuntu0.1 | nbd-client 1:3.20-1ubuntu0.1 | Mar 5, 2022 |
| nbd-client · Ubuntu 22.04.1 LTS (jammy) | 1:3.23-3ubuntu1 | nbd-client 1:3.23-3ubuntu1 | Mar 5, 2022 |
| nbd-client · Ubuntu 24.10 (oracular) | 1:3.23-3ubuntu1 | nbd-client 1:3.23-3ubuntu1 | Jan 16, 2026 |
| nbd-client · Ubuntu 25.04 (plucky) | 1:3.23-3ubuntu1 | nbd-client 1:3.23-3ubuntu1 | Jan 16, 2026 |
| nbd-server · Ubuntu 18.04.6 LTS (bionic) | 1:3.16.2-1ubuntu0.2 | nbd-server 1:3.16.2-1ubuntu0.2 | Mar 5, 2022 |
| nbd-server · Ubuntu 20.04 LTS (focal) | 1:3.20-1ubuntu0.1 | nbd-server 1:3.20-1ubuntu0.1 | Mar 5, 2022 |
| nbd-server · Ubuntu 22.04.1 LTS (jammy) | 1:3.23-3ubuntu1 | nbd-server 1:3.23-3ubuntu1 | Mar 5, 2022 |
| nbd-server · Ubuntu 24.10 (oracular) | 1:3.23-3ubuntu1 | nbd-server 1:3.23-3ubuntu1 | Jan 16, 2026 |
| nbd-server · Ubuntu 25.04 (plucky) | 1:3.23-3ubuntu1 | nbd-server 1:3.23-3ubuntu1 | Jan 16, 2026 |
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