CVE-2015-8853
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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.55% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 84.9% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2016-05-25 15:00Z10 YR AGO
- Last updated
- 2024-08-06 08:29Z2 YR AGO
- Reserved
- 2016-04-20
- Assigning CNA
- debian
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- 20a48b04ede2fbb637e2dbab0fa27027a039def0a5f9c4d5b9e0d738e778e547
05 Affected products
06 References
- security.gentoo.orgGLSA-201701-75https://security.gentoo.org/glsa/201701-75
- www.openwall.com[oss-security] 20160420 Re: CVE Request: perl: denial-of-service / Regexp-matching "hangs" indefinitely on illegal input using binmode :utf8 using 100%CPUhttp://www.openwall.com/lists/oss-security/2016/04/20/7
- usn.ubuntu.comUSN-3625-2https://usn.ubuntu.com/3625-2/
- www.openwall.com[oss-security] 20160420 CVE Request: perl: denial-of-service / Regexp-matching "hangs" indefinitely on illegal input using binmode :utf8 using 100%CPUhttp://www.openwall.com/lists/oss-security/2016/04/20/5
- rt.perl.orghttps://rt.perl.org/Public/Bug/Display.html?id=123562
- www.oracle.comhttp://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- www.oracle.comhttp://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
- www.securityfocus.com86707http://www.securityfocus.com/bid/86707
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1329106
- h20566.www2.hpe.comhttps://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
- perl5.git.perl.orghttp://perl5.git.perl.org/perl.git/commitdiff/22b433eff9a1ffa2454e18405a56650f07b385b5
- usn.ubuntu.comUSN-3625-1https://usn.ubuntu.com/3625-1/
- lists.fedoraproject.orgFEDORA-2016-5a9313e4b4http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183592.html
07 Fixed in
Debian 12
- perl Fixed in 5.22.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- perl Fixed in 5.22.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- perl Fixed in 5.22.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- perl Fixed in 5.18.2-2ubuntu1.4
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.