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High

Sandbox escape via integer overflow in Chrome GPU

IdentifiersCVE-2026-11256CWE-125· Out-of-bounds Read

CVE-2026-11256 is an integer overflow vulnerability in the GPU component of Google Chrome affecting versions prior to 149.0.7827.53. According to the provided content, exploitation requires a remote attacker to first compromise the renderer process and then trigger the flaw via a crafted HTML page. Successful exploitation could allow the attacker to cross Chrome’s intended security boundary and escape the browser sandbox. The supplied record associates this issue with CWE-125, although the textual description specifically characterizes the bug as an integer overflow in the GPU component.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

If exploited, this vulnerability can enable a sandbox escape from a compromised renderer process. In practical terms, this may allow attacker-controlled code that was initially confined to the renderer sandbox to execute with access beyond that sandbox boundary, increasing the potential for broader compromise of the browser process environment and possibly the underlying system. The provided CVSS vector indicates high potential impact to confidentiality, integrity, and availability.

Mitigation

If you can’t patch tonight, do this now.

No specific workaround is provided in the supplied content. Where immediate patching is not possible, reducing exposure would depend on limiting access to untrusted web content and reducing the likelihood of renderer compromise, but the authoritative remediation in the provided advisories is to update to the fixed version.

Remediation

Patch, then assume compromise.

Upgrade Google Chrome to version 149.0.7827.53 or later. For Debian chromium packages, upgrade to the vendor-fixed builds identified in the advisory, including 149.0.7827.53-1~deb12u1 for bookworm and 149.0.7827.53-1~deb13u1 for trixie.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
GoogleChromeapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

4 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity3

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-11256
NVD
nvd.nist.gov/vuln/detail/CVE-2026-11256
MITRE CWE · CWE-125
Out-of-bounds Read
Vendor Advisory
chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html
Permissions Required
issues.chromium.org/issues/498856565