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Use-after-free in File Input in Google Chrome on Linux

IdentifiersCVE-2026-12441CWE-416

CVE-2026-12441 is a critical use-after-free vulnerability in the File Input component of Google Chrome on Linux prior to version 149.0.7827.155. The flaw is described as a use-after-free condition that can lead to heap corruption when a target visits a crafted HTML page. Google identified it as a Chromium critical-severity issue. The available advisory material does not provide the specific vulnerable function or code path, but the bug class indicates that freed memory can be accessed after release during File Input handling, creating a memory corruption condition that may be exploitable.

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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.

Successful exploitation could allow a remote attacker to trigger heap corruption in the browser process by luring a victim to a crafted HTML page. Based on the vendor and downstream advisory context for this Chrome release, resulting impacts may include remote code execution, browser process compromise, denial of service, or use as part of a broader exploit chain. The precise post-exploitation impact for this individual CVE is not fully disclosed in the provided material.

Mitigation

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

No specific workaround is provided in the supplied advisories beyond patching. Until updates are applied, reduce exposure by limiting access to untrusted websites and untrusted HTML content, using browser isolation or similar containment controls where available, and monitoring enterprise environments for outdated Chrome/Chromium/Edge installations.

Remediation

Patch, then assume compromise.

Upgrade Google Chrome on Linux to version 149.0.7827.155 or later. Downstream Chromium consumers should apply the corresponding fixed builds. For Debian, the referenced fixed Chromium package versions are 149.0.7827.155-1~deb13u1 for Debian stable (trixie) and 149.0.7827.155-1~deb12u1 for Debian oldstable (bookworm). For Microsoft Edge (Chromium-based), update to version 149.0.4022.80 or later, which incorporates the Chromium fix.
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

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

7 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

Query your assets running an affected version, and investigate the blast radius.

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 activity2

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

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-12441
NVD
nvd.nist.gov/vuln/detail/CVE-2026-12441
MITRE CWE · CWE-416
cwe.mitre.org