CVE-2021-43539

Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers

published December 8, 2021

CVSS
—
EPSS
2%
Percentile
77.5
In the wild
Unconfirmed
What it is

Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01734 · 77.5th percentile
Published
2021-12-08T21:20Z
EPSS history
Timeline
  • 08 DEC 21:20Z
    Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers
    cvelistv5