Security readout for executives and security teams
Plain-English summary
This CVE affects Linux kernel 5.0.21 when a crafted f2fs filesystem image is mounted. The reported bug can write outside an expected kernel memory area, which may crash the system or create kernel-memory corruption risk. Business urgency depends on whether systems mount untrusted f2fs images or removable media.
Executive priority
Prioritize systems that process untrusted storage media or disk images. For ordinary servers without f2fs use or untrusted mount paths, urgency is lower, but kernel memory corruption warrants tracking through vendor patch management.
Technical view
The issue is a slab out-of-bounds write in __remove_dirty_segment during f2fs mount handling. The source description says an array bounded by eight dirty segment types can be indexed beyond its valid range when processing a crafted f2fs image. No CVSS score, CWE, or fixed version is provided in the bundle.
Likely exposure
Likely exposure is Linux kernel 5.0.21 systems with f2fs support where untrusted filesystem images, removable media, or disk images can be mounted. The bundle does not identify specific distributions, CPEs, or broad product versions.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation evidence. Public references include a GitHub researcher repository and a NetApp advisory, but the provided data does not establish weaponized exploitation, affected NetApp product details, or patch status.
Researcher notes
Evidence is limited to the CVE description and two public references. The affected list in the bundle is not product-specific, and no CVSS, CWE, fixed commit, or distro patch mapping is provided. Treat exposure assessment as environment-dependent.
Mitigation direction
- Check Linux distribution and vendor advisories for CVE-2019-19814 guidance.
- Update affected kernels when a vendor-supported fix is available.
- Avoid mounting untrusted f2fs filesystem images or removable media.
- Restrict mount privileges to trusted administrators and controlled automation.
- Disable or remove f2fs support where it is not operationally required.
Validation and detection
- Inventory systems running Linux kernel 5.0.21 or nearby vendor builds.
- Confirm whether f2fs support is installed, loaded, or enabled.
- Review workflows that mount user-supplied disk images or removable media.
- Check vendor advisories for fixed kernel package versions.
- Review NetApp advisory relevance for any deployed NetApp products.
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
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.
CVE-2019-19814 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
- https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19814CVE reference · x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20200103-0001/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.