Security readout for executives and security teams
CVE-2020-25670 is a Linux kernel NFC socket flaw. The reported bug is a reference-count leak in llcp_sock_bind() that can create a use-after-free condition and may allow privilege escalation. This is a kernel-level issue, so successful exploitation could affect host integrity, but the provided sources do not show active exploitation. Exposure is most relevant to Linux systems with affected kernel builds and NFC/LLCP socket support available. The bundle broadly lists Linux Kernel as affected, while Fedora, Debian LTS, and NetApp advisories indicate vendor-specific exposure. Systems without NFC support or with fixed vendor kernels are likely lower risk, but version-specific confirmation is required. Treat this as a kernel privilege-escalation issue requiring patch management attention, especially on shared Linux hosts and appliances. There is no evidence of active exploitation in the provided sources, so prioritize through normal high-severity kernel update workflows rather than emergency incident response. Mitigation focus: Apply kernel security updates from the relevant Linux distribution or appliance vendor.; Review Fedora, Debian LTS, NetApp, or other vendor advisories for fixed package versions.; Prioritize internet-facing and multi-user Linux systems where local privilege escalation has higher impact..
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-416: 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-2020-25670 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- FEDORA-2021-1c170a7c7cCVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-21360476b6CVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-d56567bdabCVE reference · vendor-advisory, x_refsource_FEDORA
- https://www.openwall.com/lists/oss-security/2020/11/01/1CVE reference · x_refsource_MISC
- [debian-lts-announce] 20210623 [SECURITY] [DLA 2689-1] linux security updateCVE reference · mailing-list, x_refsource_MLIST
- [debian-lts-announce] 20210623 [SECURITY] [DLA 2690-1] linux-4.19 security updateCVE reference · mailing-list, x_refsource_MLIST
- https://security.netapp.com/advisory/ntap-20210702-0008/CVE reference · x_refsource_CONFIRM
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.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.