CVE-2016-4558: n/a vulnerability

CVE-2016-4558: The BPF subsystem in the Linux kernel before 4.5.5 mishandles reference counts, which allows local users to...

The BPF subsystem in the Linux kernel before 4.5.5 mishandles reference counts, which allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a crafted application on (1) a system with more than 32 Gb of memory, related to the program reference count or (2) a 1 Tb system, related to the map reference count.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 00:32 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2016-4558 is a Linux kernel BPF bug where internal reference counts can be mishandled. A local user could crash the system through a crafted application, and the public record leaves open the possibility of other unspecified impact. Exposure is most relevant for Linux hosts running kernels before 4.5.5 where untrusted local users or workloads can run applications, especially high-memory systems meeting the CVE’s stated thresholds. Treat as a targeted operational risk for older Linux systems, not an internet-facing emergency. Prioritize patch verification on shared, high-memory, or multi-tenant hosts where local code execution is possible. Mitigation focus: Upgrade to a vendor kernel containing the upstream 4.5.5 BPF fix.; Follow applicable Ubuntu, Red Hat, or distribution-specific advisory guidance.; Prioritize shared servers, multi-user systems, and high-memory Linux hosts..

Prepared: Jun 13, 2026, 14:22 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 23, 2016, 10:00 UTC (UTC+00:00)

Official CVE source material

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.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://bugzilla.redhat.com/show_bug.cgi?id=1334303CVE reference · x_refsource_CONFIRM
https://github.com/torvalds/linux/commit/92117d8443bc5afacc8d5ba82e541946310f106eCVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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