How severe is CVE-2017-15650?

CVE-2017-15650 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2017-15650 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-15650?

CVE-2017-15650 affects Musl-libc Musl. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-15650?

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-2017-15650 published?

CVE-2017-15650 was published on 2017-10-19 and last updated on 2026-06-17.

CVE-2017-15650

CVE-2017-15650 is a high-severity vulnerability in Musl-libc Musl with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Musl-libc Musl
Published: 2017-10-19
Last modified: 2026-06-17

Description

musl libc before 1.1.17 has a buffer overflow via crafted DNS replies because dns_parse_callback in network/lookup_name.c does not restrict the number of addresses, and thus an attacker can provide an unexpected number by sending A records in a reply to an AAAA query.

Frequently asked questions

What is CVE-2017-15650?: musl libc before 1.1.17 has a buffer overflow via crafted DNS replies because dns_parse_callback in network/lookup_name.c does not restrict the number of addresses, and thus an attacker can provide an unexpected number by sending A records in a reply to an AAAA query.
How severe is CVE-2017-15650?: CVE-2017-15650 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2017-15650 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-15650?: CVE-2017-15650 affects Musl-libc Musl. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-15650?: 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-2017-15650 published?: CVE-2017-15650 was published on 2017-10-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:musl-libc:musl:*:*:*:*:*:*:*:*

More vulnerabilities in Musl-libc Musl

CVE-2014-3484 — Critical (CVSS 9.8): Multiple stack-based buffer overflows in the __dn_expand function in network/dn_expand.c in musl libc 1.1x before 1.1.2…
CVE-2019-14697 — Critical (CVSS 9.8): musl libc through 1.1.23 has an x87 floating-point stack adjustment imbalance, related to the math/i386/ directory. In…
CVE-2015-1817 — Critical (CVSS 9.8): Stack-based buffer overflow in the inet_pton function in network/inet_pton.c in musl libc 0.9.15 through 1.0.4, and…
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CVE-2020-28928 — Medium (CVSS 5.5): In musl libc through 1.2.1, wcsnrtombs mishandles particular combinations of destination buffer size and source…

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