CVE-2026-31912 (GCVE-0-2026-31912)

Vulnerability from cvelistv5 – Published: 2026-09-05 18:49 – Updated: 2026-09-08 18:21
VLAI
Title
OOBR in libpcap before 1.10.7
Summary
libpcap BPF interpreter detects neither reaching the end of the filter program buffer due to lack of a return instruction nor executing a jump instruction with an offset that translates to a pointer outside of the buffer. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading the OS process memory in the 32GiB around the buffer on 64-bit architectures and in the entire address space on 32-bit architectures.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 18:21 UTC
CWE
  • CWE-1285 - Improper Validation of Specified Index, Position, or Offset in Input
  • CWE-823 - Use of Out-of-range Pointer Offset
  • CWE-125 - Out-of-bounds Read
Assigner
References
Impacted products
Vendor Product Version CPE status
The Tcpdump Group libpcap Affected: 0 , < 1.10.7 (semver)
guessed Create a notification for this product.
Credits
Denis Ovsienko
Show details on NVD website
To clipboard 

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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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