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In the IPv6 implementation in the Linux kernel before 5.13.3, net/ipv6/output_core.c has an information leak because of certain use of a hash table which, although big, doesn't properly consider that…

High CVSS 7.5
CVECVE-2021-45485
First seen2026-08-05 19:15 UTC
Disclosed2021-12-25 02:15 UTC
Last updated2026-08-05 19:15 UTC
Channel statusauto

Summary

In the IPv6 implementation in the Linux kernel before 5.13.3, net/ipv6/output_core.c has an information leak because of certain use of a hash table which, although big, doesn't properly consider that IPv6-based attackers can typically choose among many IPv6 source addresses.

In-depth triage · Auto channel

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Affected products

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Lint boundary warnings (2)

The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).

  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://arxiv.org/pdf/2112.09604.pdf
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://arxiv.org/pdf/2112.09604.pdf

Sources

  • NVD DATABASE

Original Links

Timeline

  1. nvd_ingest NVD