Out-of-Bounds Write via Integer Overflow Enables Local Privilege Escalation in Android
AI analysis
CVE-2026-49927 is an integer-overflow flaw (CWE-190) in the Android operating system that results in an out-of-bounds write; the description notes it exists 'in multiple locations' but the specific Android component is not identified in the available data. It is triggered by local code running on the device, such as a malicious or compromised app, and exploitation requires no user interaction and no additional execution privileges. A successful exploit gives the attacker elevated code execution, producing high impact on confidentiality, integrity, and availability (CVSS 3.1: 7.8, AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Any Android device running a build containing the vulnerable code is affected, meaning devices across the multi-billion-device Android install base that have not yet received the September 2026 Android Security Update in which the fix ships; that update's headline also covers other, separately tracked critical RCE flaws. There is no evidence of exploitation so far: the flaw is not in CISA KEV, its EPSS score is 0.1% over the next 30 days (0th percentile), and no public proof-of-concept is known.
What to do: Apply the September 2026 Android Security Update or any later monthly security release and confirm the device's Android security patch level in Settings, noting that OEM rollout timing varies. Until patched, treat untrusted local code (sideloaded or third-party apps) as the main attack path, since exploiting this flaw requires an attacker to already run code on the device. No public PoC or in-the-wild exploitation is known, so no emergency response is required, but unpatched devices should be prioritized in the normal patch cycle.
Estimated exposure
mass≈3+ billion Android devices globally (whole Android install base as proxy; affected version ranges undisclosed) — Google reports more than 3 billion active Android devices and Android holds roughly 70% of the global mobile OS market, and because no affected version range was disclosed in the source data, the entire shipping Android install base serves…
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
Description
In multiple locations, there is a possible out of bounds write due to an integer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.