CVEvulnerability

CVE-2021-47109

5.5 MEDIUM Published 2024-03-15 Modified 2026-08-04 Official page ↗
Status
Modified
Published
2024-03-15
Last modified
2026-08-04
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-190

Description

In the Linux kernel, the following vulnerability has been resolved: neighbour: allow NUD_NOARP entries to be forced GCed IFF_POINTOPOINT interfaces use NUD_NOARP entries for IPv6. It's possible to fill up the neighbour table with enough entries that it will overflow for valid connections after that. This behaviour is more prevalent after commit 58956317c8de ("neighbor: Improve garbage collection") is applied, as it prevents removal from entries that are not NUD_FAILED, unless they are more than 5s old.

Affected configurations

• linux linux kernel (>= 5.0 < 5.4.125) • linux linux kernel (>= 5.5 < 5.10.43) • linux linux kernel (>= 5.11 < 5.12.10) • linux linux kernel 5.13

Related

Weakness · CWE (1)

  • CWE-190 Integer Overflow or Wraparound weakness

References