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TI-2026-58555 Aliases CVE-2026-85234GHSA-rxqq-3mgh-v3m7

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

Priority LOW 39CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 3 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-125 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0047 40th percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 3 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat Enterprise Linux 10—5.2-50.el10_2Patch availableCNA
Red HatRed Hat Enterprise Linux 8—5.2-28.el8_10Patch availableCNA
Red HatRed Hat Enterprise Linux 9—5.2-40.el9_8.1Patch availableCNA
Red HatRed Hat Enterprise Linux 6——No fix listedCNA
Red HatRed Hat Enterprise Linux 7——No fix listedCNA
Red HatRed Hat Hardened Images——Not affectedCNA
  • Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 5.2-50.el10_2 Patch available CNA
  • Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 5.2-28.el8_10 Patch available CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 5.2-40.el9_8.1 Patch available CNA
  • Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Hardened Images VendorRed Hat Affected — Fixed in — Not affected CNA

CPE names CNA · 6

CPEVersionsRoleVendor
cpe:/o:redhat:enterprise_linux:10.210.2—Red Hat
cpe:/a:redhat:enterprise_linux:8::appstream8—Red Hat
cpe:/a:redhat:enterprise_linux:9::appstream9—Red Hat
cpe:/o:redhat:rhel_els:66—Red Hat
cpe:/o:redhat:rhel_els:77—Red Hat
cpe:/a:redhat:hummingbird:11—Red Hat
  • cpe:/o:redhat:enterprise_linux:10.2 Versions 10.2 — ·Red Hat
  • cpe:/a:redhat:enterprise_linux:8::appstream Versions 8 — ·Red Hat
  • cpe:/a:redhat:enterprise_linux:9::appstream Versions 9 — ·Red Hat
  • cpe:/o:redhat:rhel_els:6 Versions 6 — ·Red Hat
  • cpe:/o:redhat:rhel_els:7 Versions 7 — ·Red Hat
  • cpe:/a:redhat:hummingbird:1 Versions 1 — ·Red Hat

Remediation

Red Hat 3 advisories

  • RHSA-2026:82280 Released 2026-10-13 · Red Hat rating Moderate
    tftp security update
    • Red Hat Enterprise Linux AppStream (v. 10) tftp-5.2-50.el10_2, tftp-server-5.2-50.el10_2
  • RHSA-2026:80663 Released 2026-10-12 · Red Hat rating Moderate
    tftp security update
    • Red Hat Enterprise Linux AppStream (v. 9) tftp-5.2-40.el9_8.1, tftp-server-5.2-40.el9_8.1
  • RHSA-2026:78952 Released 2026-10-08 · Red Hat rating Moderate
    tftp security update
    • Red Hat Enterprise Linux AppStream (v. 8) tftp-5.2-28.el8_10, tftp-server-5.2-28.el8_10

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:82280
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:78952
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:80663
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-85234
  2. 2026-10-03 Alias added: GHSA-rxqq-3mgh-v3m7
  3. 2026-10-08 Fix available: Red Hat Enterprise Linux AppStream (v. 8) · Red Hat
  4. 2026-10-08 Fix available: tftp@0:5.2-28.el8_10 · CNA
  5. 2026-10-08 1 new reference · CNA
  6. 2026-10-09 Fix available: RHSA-2026:78952 · Red Hat
  7. 2026-10-11 EPSS moved to the below the 50th percentile
  8. 2026-10-11 Priority changed: MEDIUM → LOW
  9. 2026-10-12 Fix available: tftp@0:5.2-40.el9_8.1 · CNA
  10. 2026-10-12 1 new reference · CNA
  11. 2026-10-12 Fix available: RHSA-2026:80663 · Red Hat
  12. 2026-10-13 Fix available: Red Hat Enterprise Linux AppStream (v. 9) · Red Hat
  13. 2026-10-13 Fix available: tftp@0:5.2-50.el10_2 · CNA
  14. 2026-10-13 1 new reference · CNA
  15. 2026-10-14 Fix available: RHSA-2026:82280 · Red Hat
  16. 2026-10-15 Fix available: Red Hat Enterprise Linux AppStream (v. 10) · Red Hat

References

Advisory 3

Other 3

  • TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
See all 7413 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences