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HIGH

CVE-2019-17011

CVSS v3

7.5

HIGH

EPSS Score

1.5 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2019-17011 Red Hat Product Security205 products fixed · 2 known affected

    Mozilla: Use-after-free when retrieving a document in antitracking

    firefox as a component of Red Hat Enterprise Linux 5 · thunderbird as a component of Red Hat Enterprise Linux 5

  • RHSA-2020:0295 Red Hat Product Security7 products fixed

    Red Hat Security Advisory: firefox security update

  • RHSA-2020:0292 Red Hat Product Security7 products fixed

    Red Hat Security Advisory: thunderbird security update

  • RHSA-2019:4205 Red Hat Product Security19 products fixed

    Red Hat Security Advisory: thunderbird security update

  • RHSA-2019:4195 Red Hat Product Security7 products fixed

    Red Hat Security Advisory: thunderbird security update

  • RHSA-2019:4148 Red Hat Product Security11 products fixed

    Red Hat Security Advisory: thunderbird security update

3 more advisories

Full record on NVD

Description

Under certain conditions, when retrieving a document from a DocShell in the antitracking code, a race condition could cause a use-after-free condition and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.

Technical details

Published
2020-01-08

Frequently asked questions

What is CVE-2019-17011?

Under certain conditions, when retrieving a document from a DocShell in the antitracking code, a race condition could cause a use-after-free condition and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.

Is CVE-2019-17011 actively exploited?

Active exploitation of CVE-2019-17011 has not been confirmed. Its EPSS score was 1.5% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-17011?

CVE-2019-17011 has a CVSS v3 base score of 7.5 (HIGH severity).

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