Stack-based Buffer Overflow Affecting kernel-devel package, versions *
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Test your applications- Snyk ID SNYK-RHEL7-KERNELDEVEL-6456189
- published 17 Mar 2024
- disclosed 15 Mar 2024
Introduced: 15 Mar 2024
CVE-2021-47109 Open this link in a new tabHow to fix?
There is no fixed version for RHEL:7 kernel-devel.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-devel package and not the kernel-devel package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2021-47109
- https://git.kernel.org/stable/c/7a6b1ab7475fd6478eeaf5c9d1163e7a18125c8f
- https://git.kernel.org/stable/c/d17d47da59f726dc4c87caebda3a50333d7e2fd3
- https://git.kernel.org/stable/c/d99029e6aab62aef0a0251588b2867e77e83b137
- https://git.kernel.org/stable/c/ddf088d7aaaaacfc836104f2e632b29b1d383cfc