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CVE-2026-21042 Samsung Mobile CVE debrief

CVE-2026-21042 is an out-of-bounds write vulnerability in libsavsac.so prior to SMR Jul-2026 Release. The vulnerability allows local attackers to execute arbitrary code. This issue affects Samsung devices and users should be aware of this vulnerability and take steps to ensure their devices are updated to the latest security patch. The vulnerability has a high CVSS score of 8.4 and is considered a high severity issue.

Vendor
Samsung Mobile
Product
Samsung Mobile Devices
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-10
Original CVE updated
2026-09-09
Advisory published
2026-07-10
Advisory updated
2026-09-09

Who should care

Users of Samsung devices should be aware of this vulnerability and take steps to ensure their devices are updated to the latest security patch. Security teams and administrators responsible for managing Samsung devices should review the CVE record and apply the necessary patches to prevent exploitation.

Technical summary

The vulnerability is caused by an out-of-bounds write in libsavsac.so prior to SMR Jul-2026 Release. This allows local attackers to execute arbitrary code. The affected product is libsavsac.so in Samsung devices prior to SMR Jul-2026 Release. Users should apply the security patch released by Samsung to mitigate this vulnerability.

Defensive priority

High

Recommended defensive actions

  • Apply the security patch released by Samsung for SMR Jul-2026 Release
  • Ensure devices are updated to the latest security patch
  • Monitor devices for suspicious activity

Evidence notes

The CVE record was published on 2026-07-10T05:16:34.797Z and was last modified on 2026-07-10T13:16:19.593Z. The NVD entry is currently being reviewed. Samsung has released a security patch for SMR Jul-2026 Release to address this vulnerability. Users should verify their devices are updated to the latest security patch. The CVE record provides limited detail on affected products and versions.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-21042 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-21042

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

  • CVE-2026-21042 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-21042

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

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.