Is CVE-2017-12883 in the CISA KEV catalog?

No. CVE-2017-12883 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-12883?

CVE-2017-12883 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2017-12883?

CVE-2017-12883 has an EPSS score of 5.91% (92th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-12883?

Upgrade perl on debian 11 to 5.26.0-8 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2017-12883

CRITICALEPSS 92th pctl

9.1

CVSS v3

NVD

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.

CWE-119Buffer Overflow

How to fix

Remediation Available

perlDebian

Fixed in:5.26.0-8CVE-2017-12883

perlUbuntu

Fixed in:5.18.2-2ubuntu1.3USN-3478-1

Fixed in:5.22.1-9ubuntu0.2USN-3478-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Exploit Intelligence

5.91%probability of exploitation in 30 days

92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

References

Patch3

Vendor Advisory2

Third-Party Advisory1

securityfocus.com

Other references4

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.