Vulnerability · Published May 21, 2026 · Assigned by securin
CVE-2026-7837TOCTOU with root privilege in ad_flush
Low 3.7
In plain English
A low-severity security flaw in Netatalk from Netatalk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)3.7Low
Exploit odds (30 days)0.2%top 85.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | netatalk | 4.5.0-r0 | ALPINE-CVE-2026-7837 |
| Debian:13 | netatalk | no fix listed | DEBIAN-CVE-2026-7837 |
| Debian:14 | netatalk | 4.5.0~ds-1 | DEBIAN-CVE-2026-7837 |
| Ubuntu:25.10 | netatalk | no fix listed | UBUNTU-CVE-2026-7837 |
| Ubuntu:26.04:LTS | netatalk | no fix listed | UBUNTU-CVE-2026-7837 |
| Ubuntu:26.10 | netatalk | no fix listed | UBUNTU-CVE-2026-7837 |
Affected products (as reported)
Weakness: CWE-367 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
References
- Netatalk Security Advisory CVE-2026-7837 vendor-advisory