CVE-2019-18397
fribidi: buffer overflow in fribidi_get_par_embedding_levels_ex() in lib/fribidi-bidi.c leading to denial of service and possible code execution
Severity
ImportantRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · November 7, 2019
Updated · June 27, 2026
Description
A heap-based buffer overflow vulnerability was found in GNU FriBidi, an implementation of the Unicode Bidirectional Algorithm (bidi). When the flaw is triggered it's possible to manipulate the heap contents, leading to memory corruption causing a denial of service and to arbitrary code execution. The highest threat from this flaw to both data and system availability.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 7.8CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-787 · Out-of-bounds Write