Medium [CVE-2026-89498] Double-free vulnerability in Linux kernel via malformed readdir downcall
This medium-severity Red Hat Linux advisory covers CVE-2026-89498.
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Summary
A flaw was found in OrangeFS within the Linux kernel. A local client, by sending a specially crafted readdir downcall with a declared trailer_size exceeding the actual supplied bytes, can trigger a double-free vulnerability.
This memory corruption issue can lead to a system crash, resulting in a denial of service. Red Hat severity: Moderate — CVSS 4.1 (CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-763.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 14 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 14 minutes ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 14 minutes ago·verify at source
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