DaystoPatch

GoogleExploited incident

Google Chromium V8 Type Confusion Vulnerability

CVE-2025-6554High, CVSS 8.1In CISA's Known Exploited Vulnerabilities catalog since 2 Jul 2025

Automated timeline. Not yet checked by a researcher, so it doesn't count toward any grade.

FixedFixed for every supported version on the day it became public.

Response

Silence
0h
First public report to first vendor statement
Exposure
0h
First public report to first fixUnverified source
Follow-through
0h
First public report to a fix for every supported versionUnverified source
  • Vendor silent
  • Vendor statement, no fix
  • Fixed for some versions
  • Fixed when disclosed
  • Date only, no time of day

Timeline and evidence

Open a moment to see its source and archived quote.

  1. First public report

    Google advisory chrome-2347877532971512439/CVE-2025-6554ClaimedQuote verified

    The Stable channel has been updated to 138.0.7204.96/.97 for Windows, 138.0.7204.92/.93 for Mac and 138.0.7204.92 for Linux which will roll out over the coming days/weeks. A full list of changes in

    The vendor's own disclosure.

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    sha256:5d58a69dee1f026f…
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    5 more sources for this moment
    CVE.org record CVE-2025-6554ClaimedQuote verified30 Jun 2025, 21:14 UTC

    Type confusion in V8 in Google Chrome prior to 138.0.7204.96 allowed a remote attacker to perform arbitrary read/write via a crafted HTML page. (Chromium security severity: High)

    CVE record published.

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    sha256:8e6caf5e22e30752…
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    Bluesky postClaimedQuote not checked yet30 Jun 2025, 21:25 UTC

    You can now share your thoughts on vulnerability CVE-2025-6554 in Vulnerability-Lookup:

    Earliest third-party post we hold.

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    Bluesky post social
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    Mastodon postClaimedQuote not checked yet1 Jul 2025, 11:41 UTC

    Google moved fast to patch it. Did your browser make it through the breach? https:// thedefendopsdiaries.com/unders tanding-cve-2025-6554-a-deep-dive-into-chromes-latest-security-challenge/ # cve20256554 # chromevulnerability # cybersecurity # zeroday # googlesecurity

    Earliest third-party post we hold.

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    Mastodon post social
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    CISA KEV (CVE-2025-6554)ClaimedQuote verified2 Jul 2025

    Google Chromium V8 Type Confusion Vulnerability

    Added to CISA's KEV catalog on 2025-07-02.

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    sha256:ef8fffede5c47200…
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    Hacker NewsClaimedQuote not checked yet5 Jul 2025, 08:22 UTC

    https://nvd.nist.gov/vuln/detail/CVE-2025-6554

    Earliest third-party post we hold.

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  2. Vendor statement

    at disclosure

    Google advisory chrome-2347877532971512439/CVE-2025-6554ClaimedQuote verified

    The Stable channel has been updated to 138.0.7204.96/.97 for Windows, 138.0.7204.92/.93 for Mac and 138.0.7204.92 for Linux which will roll out over the coming days/weeks. A full list of changes in

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    Found in the archived copy
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    sha256:5d58a69dee1f026f…
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    Dispute this timestamp

  3. First workaround

    No official mitigation found yet.

  4. First fix

    at disclosureUnverified: quote not found in the archived copy

    Google advisory chrome-2347877532971512439/CVE-2025-6554ClaimedQuote not found in archive

    The Stable channel has been updated to 138.0.7204.96/.97 for Windows, 138.0.7204.92/.93 for Mac and 138.0.7204.92 for Linux which will roll out over the coming days/weeks.

    Stable Channel Update for Desktop: build fixing the listed CVEs (one candidate per channel/platform)

    Recorded time
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    Not found in the archived copy. Treat with caution.
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    sha256:477c89b786e3616c…
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  5. Fixed for all versions

    at disclosureUnverified: derived by rule, not read from a source

    Google advisory chrome-2347877532971512439/CVE-2025-6554Inferred

    The Stable channel has been updated to 138.0.7204.96/.97 for Windows, 138.0.7204.92/.93 for Mac and 138.0.7204.92 for Linux which will roll out over the coming days/weeks. A full list of changes in

    Patch-day rule: Google ships fixes in the advisory that discloses a bug, and this advisory states that fixed versions exist. So the vendor statement, first fix and fix for all versions all take the advisory's publication time.

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Send this to your boss

No brief for this incident yet. We write one for every open incident and every critical bug exploited before a fix.

Affected products

  • Chromium V8
  • Chrome

Related

Google report card