Security readout for executives and security teams
Plain-English summary
This is a Red Hat-specific Linux kernel Bluetooth flaw. An attacker physically nearby could send crafted AMP packets and leak small pieces of kernel stack memory. The impact is confidentiality only, with no integrity or availability impact described. It is not an internet-routable issue.
Executive priority
Handle as a moderate confidentiality risk. It deserves timely remediation on Bluetooth-enabled Red Hat endpoints, especially in shared offices, public areas, or high-sensitivity environments. It is less urgent than remotely exploitable internet-facing vulnerabilities.
Technical view
CVE-2020-25662 is described as a regression related to CVE-2020-12352 in Red Hat kernel Bluetooth stack handling. Certain AMP packets may trigger improper stack memory initialization, causing limited stack memory disclosure. The supplied affected version is Red Hat kernel-4.18.0-240.el8.
Likely exposure
Exposure appears limited to Red Hat systems running the listed affected kernel with Bluetooth capability enabled or reachable by nearby attackers. Systems without Bluetooth exposure, or not on kernel-4.18.0-240.el8, are not evidenced as affected in the provided bundle.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. The CVSS vector requires adjacent network range, high attack complexity, no privileges, and no user interaction. Treat exploit status as unconfirmed from these sources.
Researcher notes
Evidence is narrow: the bundle identifies a Red Hat-only regression, one affected kernel build, adjacent attack requirements, and memory disclosure through crafted AMP packets. Do not generalize this to all Linux kernels or claim exploitation without additional cited evidence.
Mitigation direction
- Review Red Hat BleedingTooth and Bugzilla guidance for corrected packages or mitigations.
- Prioritize vendor-supported kernel updates for systems confirmed on affected Red Hat builds.
- Assess disabling Bluetooth where it is unnecessary and operationally acceptable.
- Track remediation through standard vulnerability management until affected kernels are replaced.
Validation and detection
- Inventory Red Hat systems for kernel-4.18.0-240.el8.
- Identify systems with Bluetooth hardware, drivers, or services enabled.
- Confirm whether Red Hat advisories classify each platform as affected.
- After remediation, verify systems no longer run the affected kernel build.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-284: Authorization and privilege behavior lookup
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Open ATT&CK lookupCWE-665: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2020-25662 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N1.63.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://access.redhat.com/security/vulnerabilities/BleedingToothCVE reference
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25662CVE reference
- https://access.redhat.com/security/cve/CVE-2020-12352CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.