CVE-2026-21042
Local out-of-bounds write in libsavsac.so allows local RCE on affected devices.
Is CVE-2026-21042 being exploited?
Not confirmed. CVE-2026-21042 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.44% probability of exploitation in the next 30 days.
How severe is CVE-2026-21042?
CVE-2026-21042 is rated High with a CVSS score of 8.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-21042?
Yes. A fix has been recorded for CVE-2026-21042. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-21042 affect?
CVE-2026-21042 affects libsavsac.so (pre-SMR Jul-2026 Release 1), Mobile devices using affected SMR builds. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-21042?
Install SMR Jul-2026 Release 1 or vendor patch; limit untrusted local access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local attacker can trigger an out-of-bounds write in libsavsac.so to execute arbitrary code (local RCE), potentially elevating privileges on the device.
Patch when possible