CVE-2017-12883: perl
Vulnerability summary
CVE-2017-12883 is a critical (CVSS 9.1) vulnerability in perl. EPSS estimates a 5.91% chance of exploitation in the next 30 days, higher than 93.2% of scored vulnerabilities.
Severe, CVSS 9.1 (NVD); no exploitation reported by the 5 checked sources; EPSS 6% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 7 · Related 3Timeline
- 19-09-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
Buffer overflow in the S_grok_bslash_N function in regcomp.c in Perl 5 before 5.24.3-RC1 and 5.26.x before 5.26.1-RC1 allows remote attackers to disclose sensitive information or cause a denial of service (application crash) via a crafted regular expression with an invalid '\N{U+...}' escape.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated9.1CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated9.1CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated9.1CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
5.91%
Chance of exploitation in the next 30 days
Percentile
93%
Versus all other CVEs
30-day change
No change 0.00 pp
From 5.91% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine1 product
- perl< 5.26.1-r0 | < 5.22.3-r0 | < 5.24.3-r0
Debian1 product
- perl< 5.26.0-8
Perl1 product
- perlEOL≤ 5.24.2 | 5.26.0
Ubuntu1 product
- perl< 5.18.2-2ubuntu1.3 | < 5.22.1-9ubuntu0.2
4 vendors · 4 products
References
16 links
- www.oracle.com/security-alerts/cpujul2020.htmlX Refsource MISC
- perl5.git.perl.org/perl.git/log/refs/tags/v5.26.1-RC1X Refsource CONFIRMRelease NotesVendor Advisory
- perl5.git.perl.org/perl.git/log/refs/tags/v5.24.3-RC1X Refsource CONFIRMRelease NotesVendor Advisory
- security.netapp.com/advisory/ntap-20180426-0001/X Refsource CONFIRM
- mirror.cucumberlinux.com/cucumber/cucumber-1.0/source/lang-base/perl/patches/CVE-2017-12883.patchX Refsource CONFIRMPatchThird Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=1492093X Refsource CONFIRMIssue TrackingPatchThird Party AdvisoryVDB Entry
- perl5.git.perl.org/perl.git/commitdiff/2be4edede4ae226e2eebd4eff28cedd2041f300fX Refsource CONFIRMPatchVendor Advisory