CVE-2026-85234

Tftp: tftp-hpa: denial of service due to out-of-bounds read/write in remap engine

CVSS 3.1 7.5 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-85234

Published

A flaw was found in tftp-hpa. When the `in.tftpd` remap engine processes an inverse remap rule that also aborts with a non-empty custom error message, it can pass invalid match offsets to the `genmatchstring()` function. This leads to out-of-bounds read/write operations. A remote, unauthenticated attacker can exploit this vulnerability by sending a specially crafted request, causing the daemon to crash and resulting in a denial of service.

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Affected versions, risk and source history

Exploitation and risk

Source status

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Risk history

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Advisory history

4 saved versions

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11 Nov 2026 13:57:25 UTC