CVE-2026-21067: Improper input validation in libsmsd.so prior to SMR Aug-2026 Release 1 allows local attackers to write out-of

Routine

HIGH 7.8MITIGATE

CVE-2026-21067 is a high-severity flaw (CVSS 7.8) affecting android. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper input validation in libsmsd.so prior to SMR Aug-2026 Release 1 allows local attackers to write out-of-bounds memory.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 96%)
CISA exploited list	No
Published	2026-08-10
Last modified	2026-10-23

Publisher (CNA): Samsung Mobile · Vendor: samsung

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-10 09:17 UTCPublished CVE record published
2026-10-23 20:10 UTCUpdated Record last modified

samsung android MITIGATE

Affected: 14.0 · 14.0 smr-apr-2022-r1 · 14.0 smr-apr-2023-r1 · 14.0 smr-apr-2024-r1 · 14.0 smr-apr-2025-r1 · 14.0 smr-apr-2026-r1 · 14.0 smr-aug-2022-r1 · 14.0 smr-aug-2023-r1

Fixed in: no fixed release known

Safe to downgrade to: a release before 14.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-21067?

android: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-21067 being exploited?

CVE-2026-21067 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-21067 affect?

CVE-2026-21067 affects android. Severity is high (CVSS 7.8). Improper input validation in libsmsd.so prior to SMR Aug-2026 Release 1 allows local attackers to write out-of-bounds memory.

How urgent is CVE-2026-21067?

Priority 28/100. High severity

Software pages

Android vulnerabilities · Samsung vulnerabilities

Related CVEs

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CVE-2026-21061 MEDIUM 6.5 MITIGATE Improper input validation in Samsung Dialer prior to SMR Aug-2026 Release 1 allows remote attackers to access
CVE-2026-21068 HIGH 7.8 MITIGATE Stack-based buffer overflow in libril_sem.so prior to SMR Aug-2026 Release 1 allows privileged local attackers
CVE-2026-21065 HIGH 7.8 MITIGATE Out-of-bounds write in libcodec2secqcelpdec.so prior to SMR Aug-2026 Release 1 allows local attackers to write
CVE-2026-21066 HIGH 7.8 MITIGATE Improper input validation in libcodec2_sec_flacdec.so prior to SMR Aug-2026 Release 1 allows local attackers t

References

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