CVE intelligence and bounded remediation

CVE-2020-25645 — A flaw was found in the Linux kernel in versions before 5.9-rc7

High CVSS 7.5

A flaw was found in the Linux kernel in versions before 5.9-rc7. Traffic between two Geneve endpoints may be unencrypted when IPsec is configured to encrypt traffic for the specific UDP port used by the GENEVE tunnel allowing anyone between the two endpoints to read the traffic unencrypted. The main threat from this vulnerability is to data confidentiality.

Severity
High
CVSS
7.5 (3.1)
Published
2020-10-13
CISA KEV
Not currently listed
Ecosystem
linux/kernel
Weaknesses
CWE-319

Affected products

  • linux / linux_kernel
  • linux / linux_kernel / 5.9.0
  • debian / debian_linux / 9.0
  • debian / debian_linux / 10.0
  • netapp / solidfire_&_hci_management_node
  • netapp / solidfire_&_hci_storage_node

Showing 6 representative product identities from 19 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Cryptography, certificate, signature, and channel validation

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Inventory affected algorithms, key uses, trust stores, certificate validation settings, random sources, and plaintext channels across clients and services.
  • Determine which secrets, identities, signatures, or data protections depend on the affected primitive or validation path.
  • Check debug, compatibility, fallback, and hostname or audience override settings in build and runtime configuration.

Remediate safely

  • Use a maintained platform cryptographic API with approved algorithms, modes, parameters, randomness, and full peer identity validation.
  • Remove insecure fallback and validation bypasses; separate keys by purpose and load them from managed secret storage.
  • Plan rotation or reissuance for affected keys, certificates, tokens, hashes, or ciphertext and document compatibility sequencing.

Authoritative sources

Complete CVE record and remediation plan

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