CVE-2021-47109
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
neighbour: allow NUD_NOARP entries to be forced GCed
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 58956317c8de52009d1a38a721474c24aef74fe7 | affected | git | d99029e6aab62aef0a0251588b2867e77e83b137 | Unavailable | None listed |
| 58956317c8de52009d1a38a721474c24aef74fe7 | affected | git | d17d47da59f726dc4c87caebda3a50333d7e2fd3 | Unavailable | None listed |
| 58956317c8de52009d1a38a721474c24aef74fe7 | affected | git | ddf088d7aaaaacfc836104f2e632b29b1d383cfc | Unavailable | None listed |
| 58956317c8de52009d1a38a721474c24aef74fe7 | affected | git | 7a6b1ab7475fd6478eeaf5c9d1163e7a18125c8f | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.0 | Unavailable | None listed |
| 5.4.125 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.43 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.12.10 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |