Description
GNU cflow through 1.6 has a heap-based buffer over-read in the nexttoken function in parser.c.
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 | cflow | 1:1.6-6 | — |
| Debian 13 | cflow | 1:1.6-6 | — |
| Debian 12 | cflow | 1:1.6-6 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | cflow | No fix yet | — |
| Ubuntu 26.04 LTS | cflow | No fix yet | — |
| Ubuntu 25.10 | cflow | No fix yet | — |
| Ubuntu 24.04 LTS | cflow | No fix yet | — |
| Ubuntu 22.04 LTS | cflow | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | cflow | No fix yet | — |
| Ubuntu Pro 18.04 LTS | cflow | No fix yet | — |
| Ubuntu Pro 16.04 LTS | cflow | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | cflow | 1.7-1.1 | openSUSE-SU-2024:11709-1 |
Advisories 1
- openSUSE-SU-2024:11709-1 cflow-1.7-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026