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TI-2026-82411 Aliases CVE-2026-119053GHSA-mm46-vrwc-xmpq

Out-of-bounds read in lwIP SNMP agent leaks adjacent memory

Priority LOW 37CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

lwIP versions 2.0.0 through 2.2.1, when built with the SNMP agent, contain an out-of-bounds read in snmp_pbuf_stream_writeto(), which bounds copies by the buffer length instead of the remaining bytes (CWE-125). A remote unauthenticated attacker who knows the read community can send fragmented SNMP requests and receive adjacent receive-buffer or pool memory echoed in responses.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

Description from the CNA

lwIP 2.0.0 through 2.2.1 built with the SNMP agent contains an out-of-bounds read vulnerability in snmp_pbuf_stream_writeto() that bounds copies by pbuf->len instead of remaining bytes. Remote unauthenticated attackers knowing the read community can send fragmented SNMP requests to receive adjacent receive-buffer or pool memory echoed in responses.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00482 41st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

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
lwIPlwIP2.0.0 – 2.2.1—No fix listedCNA
  • lwIP VendorlwIP Affected 2.0.0 – 2.2.1 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for lwIP.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-29 Threatist record created from CVE-2026-119053
  2. 2026-10-29 CISA SSVC decision points changed
  3. 2026-10-29 Priority changed: MEDIUM → LOW
  4. 2026-10-29 Alias added: GHSA-mm46-vrwc-xmpq
  5. 2026-11-07 Affected versions changed · Red Hat
  6. 2026-11-07 CVSS score added · Red Hat

References

Patch 1

Other 2

  • TI-2026-76190 Stack out-of-bounds write in lwIP mDNS response handler CVSS 4.0MEDIUM 6.0
  • TI-2026-59484 Out-of-bounds write in lwIP TCP/IP Stack MQTT Client Application CVSS 4.0CRITICAL 9.3
  • TI-2026-61856 Double Free in lwIP (lightweight IP) CVSS 4.0HIGH 8.7

Sources

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