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PatchSiren cyber security CVE debrief

CVE-2021-4034 Red Hat CVE debrief

CVE-2021-4034 is a Red Hat Polkit vulnerability described as an out-of-bounds read and write issue. CISA added it to the Known Exploited Vulnerabilities catalog, which means organizations should treat it as actively exploited and prioritize remediation. The supplied corpus only provides high-level details, so the safest response is to apply vendor updates and verify the fix across affected systems.

Vendor
Red Hat
Product
Polkit
CVSS
HIGH 7.8
CISA KEV
Listed
Original CVE published
2022-06-27
Original CVE updated
2022-06-27
Advisory published
2022-06-27
Advisory updated
2022-06-27

Who should care

Organizations running Red Hat Polkit, along with vulnerability management, system administration, and incident response teams responsible for applying vendor updates and validating remediation.

Technical summary

The source corpus identifies CVE-2021-4034 as a Red Hat Polkit out-of-bounds read and write vulnerability. It appears in CISA’s Known Exploited Vulnerabilities catalog, indicating known exploitation. No deeper technical breakdown is included in the supplied materials, so operational response should focus on patching, validation, and tracking affected assets.

Defensive priority

High. CISA placed this CVE in the KEV catalog and set a remediation due date of 2022-07-18, so it should be prioritized for immediate patching and verification.

Recommended defensive actions

  • Apply updates per vendor instructions as soon as possible.
  • Inventory systems that use Red Hat Polkit and confirm which are affected.
  • Verify remediation after patching and document completion before the KEV due date.
  • Monitor CISA and vendor advisories for any follow-up guidance or additional remediation steps.

Evidence notes

This debrief is grounded in the supplied CISA KEV source item, which names the issue "Red Hat Polkit Out-of-Bounds Read and Write Vulnerability," lists it as a known exploited vulnerability, and directs organizations to "Apply updates per vendor instructions." The timeline fields supplied with the corpus show dateAdded 2022-06-27 and dueDate 2022-07-18. The official CVE and NVD links are included in the corpus for reference, but no additional technical detail is asserted here.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-4034 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-4034

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

  • CVE-2021-4034 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-4034

    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.