CVE-2023-21477 — Access of Memory Location After End of Buffer vulnerability in TIGERF trustlet p

Access of Memory Location After End of Buffer vulnerability in TIGERF trustlet prior to SMR Apr-2023 Release 1 allows local attackers to access protected data.

01What is this vulnerability?

Access of Memory Location After End of Buffer vulnerability in TIGERF trustlet prior to SMR Apr-2023 Release 1 allows local attackers to access protected data.

02Affected products

Vendor	Product	Versions
Samsung Mobile	Samsung Mobile Devices	SMR Apr-2023 Release in Android 11, 12, 13

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2025-09-03T05:17:09.145Z
• Last modified: 2026-02-26T17:49:46.467Z

09References

• security.samsungmobile.com — https://security.samsungmobile.com/securityUpdate.smsb?year=2023&month=04