CVE-2020-26974

When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type

published January 7, 2021

CVSS
—
EPSS
2%
Percentile
74.6
In the wild
Unconfirmed
What it is

When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01533 · 74.6th percentile
Published
2021-01-07T13:52Z
EPSS history
Timeline
  • 07 JAN 13:52Z
    When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type
    cvelistv5