Description
An issue in the seekdir() function (/dirent/mod.rs) of relibc commit 61f42d allows attackers to cause a Denial of Service (DoS) via a crafted input.
Published: 2026-08-28
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service
Action: Assess Impact
AI Analysis

Impact

An issue in the seekdir() function of relibc's dirent module allows attackers to trigger a denial of service when they supply a specially crafted input. The bug causes the function to behave unexpectedly, leading to a program crash or resource exhaustion that renders the affected process unreachable. The problem is a direct result of improper input handling and can be classified under resource exhaustion or unvalidated input categories.

Affected Systems

The vulnerability affects the relibc library used within the Redox operating system. The affected code exists in commit 61f42d, and the issue was reported in a GitLab issue and merge request linked above. No specific version numbers or broader vendor impact are available in the CVE record.

Risk and Exploitability

The CVSS score of 7.5 indicates a medium‑to high‑severity vulnerability, and the EPSS score is not available, so the exploitation probability is uncertain. The exploit requires the attacker to supply a crafted input to the seekdir() function, which could be achieved by interacting with any program that consumes directory entries via relibc. While the precise attack vector is not explicitly documented, it is reasonable to assume that local users or potentially remote services with access to the affected code could trigger the crash. There are no current public exploits disclosed; however, the vulnerability could lead to service interruption.

Generated by OpenCVE AI on August 29, 2026 at 01:20 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade relibc to a newer commit that resolves the issue (e.g., merge request 980 or a later stable release).
  • If an upgrade is not yet available, restrict access to the seekdir() API by validating inputs or ensuring only trusted, privileged processes invoke it.
  • Apply resource limits or sandboxing to the affected services so that a denial of service attack does not collapse the entire system.

Generated by OpenCVE AI on August 29, 2026 at 01:20 UTC.

Tracking

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Advisories

No advisories yet.

History

Sat, 29 Aug 2026 00:45:00 +0000

Type Values Removed Values Added
Title Denial of Service via Crafted Seekdir Input in Redox ReLibC
Weaknesses CWE-20

Fri, 28 Aug 2026 22:30:00 +0000

Type Values Removed Values Added
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 28 Aug 2026 18:15:00 +0000

Type Values Removed Values Added
Title Denial of Service via Crafted Seekdir Input in Redox ReLibC
Weaknesses CWE-20
CWE-400

Fri, 28 Aug 2026 17:30:00 +0000

Type Values Removed Values Added
First Time appeared Redox-os
Redox-os relibc
Vendors & Products Redox-os
Redox-os relibc

Fri, 28 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
Description An issue in the seekdir() function (/dirent/mod.rs) of relibc commit 61f42d allows attackers to cause a Denial of Service (DoS) via a crafted input.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-08-28T20:10:15.360Z

Reserved: 2026-04-06T00:00:00.000Z

Link: CVE-2026-38636

cve-icon Vulnrichment

Updated: 2026-08-28T20:09:22.317Z

cve-icon NVD

Status : Deferred

Published: 2026-08-28T16:17:46.917

Modified: 2026-09-09T16:04:24.933

Link: CVE-2026-38636

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-29T01:30:05Z

Weaknesses
  • CWE-400

    Uncontrolled Resource Consumption