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Findings

CVE-2018-19591

In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname via getaddrinfo() leads to the allocation of a socket descriptor that is not closed

Published Dec 4, 2018 · updated Oct 15, 2026 · gnu glibc

In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname via getaddrinfo() leads to the allocation of a socket descriptor that is not closed. This is related to the if_nametoindex() function.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 4, 2018 · NIST NVD

    Detected

    In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname via getaddrinfo() leads to the allocation of a socket descriptor that is not closed. This is related to the if_nametoindex() function.

  2. Oct 14, 2026 · NIST NVD

    Updated

    In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname via getaddrinfo() leads to the allocation of a socket descriptor that is not closed. This is related to the if_nametoindex() function.

  3. Oct 14, 2026 · OSV.dev

    Fix available

    glibc fixed in 2.28-1; glibc fixed in 2.28-1; glibc fixed in 2.28-1

  4. Oct 14, 2026 · OSV.dev

    Fix available

    glibc fixed in 2.28-1

  5. Oct 14, 2026 · OSV.dev

    Updated

    In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname via getaddrinfo() leads to the allocation of a socket descriptor that is not closed. This is related to the if_nametoindex() function.

  6. Oct 14, 2026 · OSV.dev

    Updated

    In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname via getaddrinfo() leads to the allocation of a socket descriptor that is not closed. This is related to the if_nametoindex() function.

  7. Oct 14, 2026 · OSV.dev

    Updated

    In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname via getaddrinfo() leads to the allocation of a socket descriptor that is not closed. This is related to the if_nametoindex() function.

  8. Oct 15, 2026 · OSV.dev

    Updated

    In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname via getaddrinfo() leads to the allocation of a socket descriptor that is not closed. This is related to the if_nametoindex() function.

Affected

  • Debian:12 glibc0 → 2.28-1
  • Debian:13 glibc0 → 2.28-1
  • Debian:14 glibc0 → 2.28-1
  • cpe fedoraproject/fedora28
  • cpe fedoraproject/fedora29
  • cpe gnu/glibcversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2018-19591

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2018-19591

    30-day exploitation probability 5.5%

    first.org
  • NIST NVDVulnerability recordCVE-2018-19591

    In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname via getaddrinfo() leads to the allocation of a socket descriptor that is not closed. This is related to the if_nametoindex() function.

    nvd.nist.gov
  • OSV.devPackage advisoryDEBIAN-CVE-2018-19591
    osv.dev

References

CVE-2018-19591 · ZeroDay Findings