Description
A buffer over-read vulnerability exists in bl <4.0.3, <3.0.1, <2.2.1, and <1.2.3 which could allow an attacker to supply user input (even typed) that if it ends up in consume() argument and can become negative, the BufferList state can be corrupted, tricking it into exposing uninitialized memory via regular .slice() calls.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | bl | Fixed in 4.0.3, 3.0.1, 2.2.1, and 1.2.3 | — |
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 | node-bl | 4.0.3-1 | — |
| Debian 13 | node-bl | 4.0.3-1 | — |
| Debian 12 | node-bl | 4.0.3-1 | — |
| Debian 9 | node-bl | 1.1.2-1+deb9u1 | DLA-2698-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | node-bl | No fix yet | — |
| Ubuntu 18.04 LTS | node-bl | 1.1.2-1ubuntu1.1 | USN-5098-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | node-bl | 0.9.3-1ubuntu0.1~esm1 | USN-5159-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | bl | < 1.2.3 | 1.2.3 | GHSA-pp7h-53gx-mx7r |
| npm | bl | >= 2.0.0, < 2.2.1 | 2.2.1 | GHSA-pp7h-53gx-mx7r |
| npm | bl | >= 3.0.0, < 3.0.1 | 3.0.1 | GHSA-pp7h-53gx-mx7r |
| npm | bl | >= 4.0.0, < 4.0.3 | 4.0.3 | GHSA-pp7h-53gx-mx7r |
Advisories 4
- USN-5159-1 node-bl vulnerability Ubuntu Security Notices (USN) · Jun 25, 2026
- USN-5098-1 node-bl vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-2698-1 node-bl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- WID-SEC-2023-1599 IBM Security Guardium: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 29, 2023