Integer underflow in Netatalk - CVE-2026-44060
Published: July 12, 2026
Vulnerability identifier: #VU137326
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-44060
CWE-ID: CWE-191
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Netatalk
Affected software:
Netatalk
Netatalk
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to integer underflow in dsi_writeinit() when processing a crafted DSI packet with dsi_doff greater than dsi_len. A remote attacker can send a specially crafted DSI packet to cause a denial of service.
When exploited through the authenticated DSIFUNC_WRITE path, the issue can also consume significant disk space by splicing attacker-controlled socket data into a file. Pre-authentication exploitation requires chaining with the DSI protocol desynchronization vulnerability.
How to mitigate CVE-2026-44060
Install security update from vendor's website.