Description
GNU cflow through 1.6 has a use-after-free in the reference 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 20.04 LTS | cflow | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | cflow | 1:1.4+dfsg1-3ubuntu1.18.04.1~esm1 | USN-5375-1 |
| Ubuntu Pro 16.04 LTS | cflow | 1:1.4+dfsg1-3ubuntu1.16.04.1~esm1 | USN-5375-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | cflow | 1.7-1.1 | openSUSE-SU-2024:11709-1 |
Advisories 2
- USN-5375-1 cflow vulnerability Ubuntu Security Notices (USN) · Jun 25, 2026
- openSUSE-SU-2024:11709-1 cflow-1.7-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026