CVE-2020-24240

GNU Bison before 3.7.1 has a use-after-free in _obstack_free in lib/obstack.c (called from gram_lex) when a '\0' byte is encountered

published August 25, 2020

CVSS
—
EPSS
1%
Percentile
69.5
In the wild
Unconfirmed
What it is

GNU Bison before 3.7.1 has a use-after-free in _obstack_free in lib/obstack.c (called from gram_lex) when a '\0' byte is encountered. NOTE: there is a risk only if Bison is used with untrusted input, and the observed bug happens to cause unsafe behavior with a specific compiler/architecture. The bug report was intended to show that a crash may occur in Bison itself, not that a crash may occur in code that is generated by Bison.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01265 · 69.5th percentile
Published
2020-08-25T13:45Z
EPSS history
Timeline
  • 25 AUG 13:45Z
    GNU Bison before 3.7.1 has a use-after-free in _obstack_free in lib/obstack.c (called from gram_lex) when a '\0' byte is encountered
    cvelistv5