VulnerabilityModified
CVE-2020-27638
receive.c in fastd before v21 allows denial of service (assertion failure) when receiving packets with an invalid type code.
HIGH 7.5EPSS 2.36%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.36%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
receive.c in fastd before v21 allows denial of service (assertion failure) when receiving packets with an invalid type code.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.36% probability · 84th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-617
- Affected
- fastd project/fastd · debian/debian linux · fedoraproject/fedora
- Source
- cve@mitre.org
EPSS 2.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://bugs.debian.org/972521Issue Tracking, Third Party Advisory
- https://fastd.readthedocs.io/en/stable/releases/v21.htmlBroken Link, Release Notes, Third Party Advisory
- https://github.com/NeoRaider/fastd/commit/737925113363b6130879729cdff9ccc46c33eaeaPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00025.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D2LNSF2LI4RQ7BVGHTJQUJWP7RVGHDTK/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUZ3AGTAXH7OOP45F5WXBVRQ3IDWUR7M/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WSMH65GHKHMJAK2VMPROIPIUS4IA63CW/
- https://bugs.debian.org/972521Issue Tracking, Third Party Advisory
- https://fastd.readthedocs.io/en/stable/releases/v21.htmlBroken Link, Release Notes, Third Party Advisory
- https://github.com/NeoRaider/fastd/commit/737925113363b6130879729cdff9ccc46c33eaeaPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00025.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D2LNSF2LI4RQ7BVGHTJQUJWP7RVGHDTK/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUZ3AGTAXH7OOP45F5WXBVRQ3IDWUR7M/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WSMH65GHKHMJAK2VMPROIPIUS4IA63CW/
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.