CVE-2015-8853
perl: regexp matching hangs indefinitely on illegal UTF-8 input
Severity
ModerateRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · January 7, 2015
Updated · October 16, 2026
Description
The (1) S_reghop3, (2) S_reghop4, and (3) S_reghopmaybe3 functions in regexec.c in Perl before 5.24.0 allow context-dependent attackers to cause a denial of service (infinite loop) via crafted utf-8 data, as demonstrated by "a\x80."
Statement
Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
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 2.0 · 5.4AV:N/AC:H/Au:N/C:N/I:N/A:C
CWE-400 · Uncontrolled Resource Consumption