CVE-2015-7547

CVE-2015-7547 is a high-severity vulnerability in Redhat Enterprise Linux Desktop with a CVSS 3.x base score of 8.1. Its EPSS exploit-prediction score of 90% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Description

Multiple stack-based buffer overflows in the (1) send_dg and (2) send_vc functions in the libresolv library in the GNU C Library (aka glibc or libc6) before 2.23 allow remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted DNS response that triggers a call to the getaddrinfo function with the AF_UNSPEC or AF_INET6 address family, related to performing "dual A/AAAA DNS queries" and the libnss_dns.so.2 NSS module.

Frequently asked questions

What is CVE-2015-7547?
Multiple stack-based buffer overflows in the (1) send_dg and (2) send_vc functions in the libresolv library in the GNU C Library (aka glibc or libc6) before 2.23 allow remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted DNS response that triggers a call to the getaddrinfo function with the AF_UNSPEC or AF_INET6 address family, related to performing "dual A/AAAA DNS queries" and the libnss_dns.so.2 NSS module.
How severe is CVE-2015-7547?
CVE-2015-7547 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-7547 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 90% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-7547?
CVE-2015-7547 primarily affects Redhat Enterprise Linux Desktop. In total, 68 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-7547?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2015-7547 published?
CVE-2015-7547 was published on 2016-02-18 and last updated on 2026-06-17.

References

Affected products (68)

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