CVE-2026-49921: In multiple locations, there is a possible memory safety issue due to a heap buffer overflow

This month

CRITICAL 9.8REMOTEMITIGATE

CVE-2026-49921 is a critical-severity flaw (CVSS 9.8) affecting android. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In multiple locations, there is a possible memory safety issue due to a heap buffer overflow. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-122
Published	2026-09-08
Last modified	2026-09-24

Publisher (CNA): Android (associated with Google Inc. or Open Handset Alliance) · Vendor: google

Last updated 2026-09-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-08 19:17 UTCPublished CVE record published
2026-09-24 15:46 UTCUpdated Record last modified

google android MITIGATE

Affected: 14.0 · 15.0 · 16.0 · 16.0 qpr2 · 17.0

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-2026-49921?

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

Is CVE-2026-49921 being exploited?

CVE-2026-49921 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-2026-49921 affect?

CVE-2026-49921 affects android. Severity is critical (CVSS 9.8). In multiple locations, there is a possible memory safety issue due to a heap buffer overflow. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.

How urgent is CVE-2026-49921?

Priority 47/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Android vulnerabilities

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References

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