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Verdict

MEDIUM SEVERITY (CVSS 5.5)

What is this: A flaw was found in libarchive. A NULL pointer dereference vulnerability exists in the ACL parsing logic, specifically within the archive_acl_from_tex… (CWE-476: NULL Pointer Dereference) Affects Libarchive Libarchive.
Should you care: Rated medium severity — CVSS 5.5.
What to do: Patch when able.

OBSERVEDMODERATE EVIDENCE COVERAGEDeterministic · stored evidence only

Vulnerability investigation

Prioritize by applicability, impact, and exploitation evidence

CISA KEV status could not be verified from the available evidence. NVD rates the technical severity medium at CVSS 5.5. These are public vulnerability signals, not proof that a specific environment runs an affected version.

Exploitation status

KEV status unavailable

The KEV source did not return a conclusive status.

30-day exploitation likelihood

Unavailable

FIRST EPSS did not return a score.

Technical severity

5.5 · medium

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected surface

8 parsed products

Libarchive Libarchive, Redhat Hardened Images, Redhat Openshift Container Platform 4.0

Weakness class

CWE-476: NULL Pointer Dereference

CWE describes the weakness category, not whether a deployed product is reachable or exploitable.

Corpus evidence

1 connectors · 3 citations

No related report text is available in the local corpus.

What the evidence supports

Findings stay bounded to named sources and observable infrastructure.

2 findings

CVSS 5.5 medium technical impact

HIGH

Local · Low · None · Required

NIST NVD CVSS

CVSS measures technical severity and prerequisites; it does not measure observed exploitation likelihood.

8 affected product mappings

MODERATE

Libarchive Libarchive, Redhat Hardened Images, Redhat Openshift Container Platform 4.0, Redhat Enterprise Linux 6.0, Redhat Enterprise Linux 7.0…

NVD CPE / CISA product metadata

Product names are candidate applicability pivots. Confirm exact deployed versions and vendor ranges before remediation decisions.

What remains unknown

Whether your environment runs an affected product and version is not established by this public lookup.
Reachability, compensating controls, and successful exploitation in a specific environment are not checked.
CISA KEV status is unavailable and must be retried before drawing an exploitation conclusion.
No locally ingested public report supplies exploit, actor, or campaign context for this CVE.

What this is

A flaw was found in libarchive. A NULL pointer dereference vulnerability exists in the ACL parsing logic, specifically within the archive_acl_from_text_nl() function. When processing a malformed ACL string (such as a bare "d" or "default" tag without subsequent fields), the function fails to perform adequate validation before advancing the pointer. An attacker can exploit this by providing a maliciously crafted archive, causing an application utilizing the libarchive API (such as bsdtar) to crash, resulting in a Denial of Service (DoS).

Evidence readiness

The base CVE appears first. Independent evidence is added without blocking the page.

Investigation status

Checking for newly completed evidence

Refreshing

NIST NVD

NVD evidence is available in this response

Ready

CISA KEV

Known-exploitation catalog check is pending

Pending

FIRST EPSS

Forensia does not request or publish EPSS while source rights are under review

Rights pending

Reports

Report links are still being resolved

Pending

Relationships

Product and vulnerability relationships are still being prepared

Pending

Affected products

Vendor/product strings parsed from local CPE URIs (no inferred ATT&CK).

Product	CPE (truncated)
Redhat Enterprise Linux 10.0	cpe:2.3:o:redhat:enterprise_linux:10.0:::::::*
Redhat Enterprise Linux 9.0	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*
Redhat Enterprise Linux 8.0	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
Redhat Enterprise Linux 7.0	cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*
Redhat Enterprise Linux 6.0	cpe:2.3:o:redhat:enterprise_linux:6.0:::::::*
Redhat Openshift Container Platform 4.0	cpe:2.3:a:redhat:openshift_container_platform:4.0:::::::*
Redhat Hardened Images	cpe:2.3:a:redhat:hardened_images:-:::::::*

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