Security readout for executives and security teams
Plain-English summary
Apache NuttX before 10.1.0 has an integer wrap-around flaw in core memory allocation functions. In affected deployments, malformed or unexpected size values could cause crashes or potentially code execution. Business urgency depends on whether NuttX is used in products or devices exposed to untrusted inputs.
Executive priority
Prioritize this for any NuttX-based product that is internet-facing, remotely reachable, safety-relevant, or difficult to patch. If NuttX is not used, business exposure is unlikely. If usage is uncertain, treat inventory as the immediate priority.
Technical view
The CVE describes CWE-190 integer wrap-arounds in malloc, realloc, and memalign in Apache NuttX versions prior to 10.1.0. Incorrect allocation behavior may result in arbitrary memory allocation, unexpected behavior, denial of service, or remote code injection/execution. No CVSS vector is provided in the bundle.
Likely exposure
Exposure is likely limited to organizations building or operating products, firmware, or services that include Apache NuttX before 10.1.0. Risk is higher where attacker-influenced input can affect allocation sizes or memory-management paths.
Exploitation context
The source bundle does not show CISA KEV listing, active exploitation, public exploit availability, or exploitation telemetry. The cited description states possible crash or remote code injection/execution, but does not provide exploit prerequisites or confirmed real-world attacks.
Researcher notes
Evidence is sparse: the bundle provides the CVE description, affected version boundary, CWE-190, and one Apache mailing-list reference. There is no CVSS, no exploit confirmation, and no detailed patch analysis included, so validation should focus on version identification and allocator exposure paths.
Mitigation direction
- Upgrade Apache NuttX to version 10.1.0 or later where feasible.
- Check Apache NuttX vendor guidance for exact fixed versions and backport options.
- Review downstream firmware or product dependencies that may bundle vulnerable NuttX versions.
- Restrict untrusted inputs that can influence allocation sizes until remediation is complete.
Validation and detection
- Inventory products and builds for Apache NuttX version usage.
- Confirm no deployed build uses Apache NuttX prior to 10.1.0.
- Review code paths where external input influences malloc, realloc, or memalign sizes.
- Check crash telemetry for allocator-related failures in NuttX-based systems.
- Document remediation status for each affected product or firmware branch.
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.
CWE-190: 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-2021-26461 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://lists.apache.org/thread.html/r806fccf8b003ae812d807c6c7d97950d44ed29b2713418cbe3f2bddd%40%3Cdev.nuttx.apache.org%3ECVE reference · x_refsource_MISC
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.