Is CVE-2015-8777 in the CISA KEV catalog?

No. CVE-2015-8777 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-8777?

CVE-2015-8777 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2015-8777?

CVE-2015-8777 has an EPSS score of 0.57% (43th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-8777?

Upgrade glibc on debian 11 to 2.21-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2015-8777

MEDIUM

5.5

CVSS v3

NVD

Description

The process_envvars function in elf/rtld.c in the GNU C Library (aka glibc or libc6) before 2.23 allows local users to bypass a pointer-guarding protection mechanism via a zero value of the LD_POINTER_GUARD environment variable.

CWE-254

How to fix

Remediation Available

glibcDebian

Fixed in:2.21-1CVE-2015-8777

eglibcUbuntu

Fixed in:2.19-0ubuntu6.8USN-2985-1

libc6Ubuntu

Fixed in:2.19-0ubuntu6.8USN-2985-1

libc6-devUbuntu

Fixed in:2.19-0ubuntu6.8USN-2985-1

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 VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.57%probability of exploitation in 30 days

43rdpercentile

Moderate risk: more likely to be exploited than 43% of all known CVEs.

References

Exploit1

hmarco.org

Other references14

Related Vulnerabilities

Other CWE-254 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2016-0161	Medium	6.5	69%	-	-
CVE-2016-2296	Critical	9.4	64%	-	-
CVE-2015-1793	Medium	6.5	62%	-	Fix
CVE-2016-2118	High	7.5	37%	-	Fix
CVE-2016-3238	High	8.1	35%	-	-
CVE-2016-3198	Medium	6.5	32%	-	-

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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 2026-05-06.