Security readout for executives and security teams
CVE-2018-19591 is a glibc resource leak. A crafted hostname can cause programs using getaddrinfo() to open a socket descriptor and not close it. Repeated exposure could exhaust descriptors and disrupt service availability. The bundle does not show data theft or integrity impact. Exposure is most likely on systems running glibc/libc6 through 2.28 where applications resolve hostnames influenced by remote or untrusted input. Vendor advisories in the bundle include Fedora, Gentoo, Ubuntu, and NetApp, but exact local exposure depends on packaged glibc versions and application behavior. Treat as a high-priority availability issue for Linux and appliance estates using older glibc. It should be handled through normal emergency patch channels for exposed services, with less urgency where hostname inputs are fully trusted or systems are already beyond affected vendor versions. Mitigation focus: Apply vendor glibc/libc6 updates that address CVE-2018-19591.; Prioritize internet-facing services resolving user-supplied hostnames.; Review Fedora, Gentoo, Ubuntu, and NetApp guidance where applicable..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-404: Exact CWE lookup
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Open ATT&CK lookupCVE-2018-19591 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://sourceware.org/git/?p=glibc.git%3Ba=blob_plain%3Bf=NEWS%3Bhb=HEADCVE reference · x_refsource_CONFIRM
- FEDORA-2018-f6b7df660dCVE reference · vendor-advisory, x_refsource_FEDORA
- https://sourceware.org/bugzilla/show_bug.cgi?id=23927CVE reference · x_refsource_CONFIRM
- FEDORA-2018-060302dc83CVE reference · vendor-advisory, x_refsource_FEDORA
- GLSA-201903-09CVE reference · vendor-advisory, x_refsource_GENTOO
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Ba=commitdiff%3Bh=d527c860f5a3f0ed687bd03f0cb464612dc23408CVE reference · x_refsource_CONFIRM
- https://security.netapp.com/advisory/ntap-20190321-0003/CVE reference · x_refsource_CONFIRM
- GLSA-201908-06CVE reference · vendor-advisory, x_refsource_GENTOO
- USN-4416-1CVE reference · vendor-advisory, x_refsource_UBUNTU
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Resource Shutdown or Release
Improper Resource Shutdown or Release represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.