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TI-2016-05443 Aliases CVE-2016-6355GHSA-xqv4-m752-6vpr

Memory leak in Cisco IOS XR 5.1.x through 5.1.3, 5.2.x through 5.2.5, and 5.3.x through…

Priority LOW 38CWE-399Published · 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
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.

Summary

Memory leak in Cisco IOS XR 5.1.x through 5.1.3, 5.2.x through 5.2.5, and 5.3.x through 5.3.2 on ASR 9001 devices allows remote attackers to cause a denial of service (control-plane protocol outage) via crafted fragmented packets, aka Bug ID CSCux26791.

Why it matters now

EPSS 0.02868 86th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 14

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xr:5.1.0:*:*:*:*:*:*:*5.1.0VulnerableCisco
cpe:2.3:o:cisco:ios_xr:5.1.1:*:*:*:*:*:*:*5.1.1VulnerableCisco
cpe:2.3:o:cisco:ios_xr:5.1.1.k9sec:*:*:*:*:*:*:*5.1.1.k9secVulnerableCisco
cpe:2.3:o:cisco:ios_xr:5.1.2:*:*:*:*:*:*:*5.1.2VulnerableCisco
cpe:2.3:o:cisco:ios_xr:5.1.3:*:*:*:*:*:*:*5.1.3VulnerableCisco
cpe:2.3:o:cisco:ios_xr:5.2.0:*:*:*:*:*:*:*5.2.0VulnerableCisco
cpe:2.3:o:cisco:ios_xr:5.2.1:*:*:*:*:*:*:*5.2.1VulnerableCisco
cpe:2.3:o:cisco:ios_xr:5.2.2:*:*:*:*:*:*:*5.2.2VulnerableCisco
cpe:2.3:o:cisco:ios_xr:5.2.3:*:*:*:*:*:*:*5.2.3VulnerableCisco
cpe:2.3:o:cisco:ios_xr:5.2.4:*:*:*:*:*:*:*5.2.4VulnerableCisco
  • cpe:2.3:o:cisco:ios_xr:5.1.0:*:*:*:*:*:*:* Versions 5.1.0 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:5.1.1:*:*:*:*:*:*:* Versions 5.1.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:5.1.1.k9sec:*:*:*:*:*:*:* Versions 5.1.1.k9sec Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:5.1.2:*:*:*:*:*:*:* Versions 5.1.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:5.1.3:*:*:*:*:*:*:* Versions 5.1.3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:5.2.0:*:*:*:*:*:*:* Versions 5.2.0 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:5.2.1:*:*:*:*:*:*:* Versions 5.2.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:5.2.2:*:*:*:*:*:*:* Versions 5.2.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:5.2.3:*:*:*:*:*:*:* Versions 5.2.3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:5.2.4:*:*:*:*:*:*:* Versions 5.2.4 Vulnerable ·Cisco
Show 4 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xr:5.2.5:*:*:*:*:*:*:*5.2.5VulnerableCisco
cpe:2.3:o:cisco:ios_xr:5.3.0:*:*:*:*:*:*:*5.3.0VulnerableCisco
cpe:2.3:o:cisco:ios_xr:5.3.1:*:*:*:*:*:*:*5.3.1VulnerableCisco
cpe:2.3:o:cisco:ios_xr:5.3.2:*:*:*:*:*:*:*5.3.2VulnerableCisco
  • cpe:2.3:o:cisco:ios_xr:5.2.5:*:*:*:*:*:*:* Versions 5.2.5 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:5.3.0:*:*:*:*:*:*:* Versions 5.3.0 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:5.3.1:*:*:*:*:*:*:* Versions 5.3.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:5.3.2:*:*:*:*:*:*:* Versions 5.3.2 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-6355
  2. 2026-10-03 Alias added: GHSA-xqv4-m752-6vpr

References

Advisory 1

  • TI-2020-02680 Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
  • TI-2020-03113 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerabilities KEVCVSS 3.1HIGH 8.6
  • TI-2020-03110 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability KEVCVSS 3.1HIGH 8.6
  • TI-2018-00142 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.0
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
See all 199 →

Sources

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