CVE-2026-85234Tftp: tftp-hpa: denial of service due to out-of-bounds read/write in remap engine
Updated under an hour ago ()
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It affects Red Hat Enterprise Linux 10 and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:5.2-50.el10_2 not affected | CNA record |
Red Hat Red Hat Hardened Images redhat:hummingbird | 1 | CNA record |
References
- https://access.redhat.com/errata/RHSA-2026:78952vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:80663vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:82280vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-85234vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2460997issue-tracking, x-refsource-redhat
- https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/commit/?id=4b493532f5ce052a1c124acd0661233ec7918327
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.