CVE-2026-85234
Discovered by AISLEPUBLISHEDCWE-125
Description
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 Base Scores
CVSS v3.1(Primary)
7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Version | Status |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | 0:5.2-50.el10_2 | unaffected |
| Red Hat | Red Hat Enterprise Linux 8 | 0:5.2-28.el8_10 | unaffected |
| Red Hat | Red Hat Enterprise Linux 9 | 0:5.2-40.el9_8.1 | unaffected |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Hardened Images | — | — |
Credits
- This issue was discovered by Found by AISLE in partnership with Red Hat.
References
- https://access.redhat.com/errata/RHSA-2026:78952
- https://access.redhat.com/errata/RHSA-2026:80663
- https://access.redhat.com/errata/RHSA-2026:82280
- 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