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PatchSiren cyber security CVE debrief

CVE-2021-1905 Qualcomm CVE debrief

CVE-2021-1905 is a Qualcomm multiple-chipsets use-after-free vulnerability that CISA listed in the Known Exploited Vulnerabilities catalog on 2021-11-03. Because it is on the KEV list, organizations should treat it as a high-priority patching item and follow Qualcomm’s update guidance as soon as possible.

Vendor
Qualcomm
Product
Multiple Chipsets
CVSS
HIGH 8.4
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Organizations using Qualcomm products that include the affected multiple chipsets, especially teams responsible for mobile, embedded, and endpoint device patching.

Technical summary

The available public source data identifies a use-after-free vulnerability affecting Qualcomm multiple chipsets. CISA’s KEV entry indicates it is a known exploited vulnerability and directs defenders to apply updates per vendor instructions. No further technical details are provided in the supplied corpus.

Defensive priority

High. KEV-listed vulnerabilities should be prioritized for remediation according to vendor guidance and internal patch management processes.

Recommended defensive actions

  • Identify devices and products that use Qualcomm multiple chipsets.
  • Apply Qualcomm-recommended updates and mitigations as soon as they are available.
  • Prioritize remediation because the vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog.
  • Verify patch deployment across fleets and confirm vulnerable versions are no longer present.
  • Track CISA KEV and vendor advisories for any follow-up guidance.

Evidence notes

This debrief is limited to the supplied source corpus and official links. The corpus confirms the CVE ID, Qualcomm as the vendor, the product scope as multiple chipsets, the vulnerability class as use-after-free, and KEV listing/date information. No CVSS score, exploit chain details, or affected-version list was provided in the supplied data.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-1905 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-1905

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2021-1905 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-1905

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.