High [CVE-2026-45699] Stack-based buffer overflow in copydir allows arbitrary code execution
This high-severity Red Hat Linux advisory covers CVE-2026-45699.
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Summary
A flaw was found in Netatalk. An integer underflow vulnerability exists in the `copydir()` function of the `afpd` daemon.
This flaw occurs when a file operation crosses a device boundary within an Apple Filing Protocol (AFP) shared volume. Incorrect calculation of buffer size can lead to a stack-based buffer overflow, potentially allowing an attacker to achieve arbitrary code execution or cause a denial of service.
Netatalk is not shipped in any Red Hat product. The community builds in Fedora (4.4.3) and EPEL (3.1.18) are both outside the vulnerable version range (3.1.19–4.4.2) and are not affected by this vulnerability.
Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-120.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- No mitigation is needed as no Red Hat products or community distributions ship a vulnerable version of Netatalk.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Discussion(0)
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