CVE-2026-85234

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-85234
https://bugzilla.redhat.com/show_bug.cgi?id=2460997
https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/commit/?id=4b493532f5ce052a1c124acd0661233ec7918327

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-15 18:19

Updated : 2026-09-15 20:18

NVD link : CVE-2026-85234

Mitre link : CVE-2026-85234

CVE.ORG link : CVE-2026-85234

JSON object : View

Products Affected

No product.

CWE

CWE-125

Out-of-bounds Read

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