Description
A time-of-check time-of-use (TOCTOU) condition in the ad_flush function in Netatalk 3.0.0 through 4.4.2 involves root-privileged file operations, which may allow a remote attacker to cause limited data modification under specific race conditions.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Netatalk | Netatalk | 3.0.0 – ≤ 4.4.2 | 4.5.0 |
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 | netatalk | 4.5.0~ds-1 | — |
| Debian 13 | netatalk | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | netatalk | No fix yet | — |
| Ubuntu 26.04 LTS | netatalk | No fix yet | — |
| Ubuntu 25.10 | netatalk | No fix yet | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | netatalk | No fix yet | — |
| Ubuntu Pro 22.04 LTS | netatalk | No fix yet | — |
| Ubuntu Pro 20.04 LTS | netatalk | No fix yet | — |
| Ubuntu Pro 18.04 LTS | netatalk | No fix yet | — |
| Ubuntu Pro 16.04 LTS | netatalk | No fix yet | — |
| Ubuntu Pro 14.04 LTS | netatalk | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | netatalk | 4.5.0-r0 | — |
References
- Netatalk Security Advisory CVE-2026-7837 vendor-advisory