Low [CVE-2026-86137] Denial of Service via out-of-bounds read in xmlFAParsePosCharGroup
This low-severity Red Hat Linux advisory covers CVE-2026-86137 affecting Red Hat Hardened Images.
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Summary
A flaw was found in libxml2. This out-of-bounds read vulnerability, specifically within the `xmlFAParsePosCharGroup` function, could allow an attacker to cause a denial of service.
By processing specially crafted XML input, the affected component may attempt to read data beyond its allocated memory buffer, leading to application instability or crashes. Red Hat severity: Low — CVSS 2.9 (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).
Weakness: CWE-125. Affected Red Hat products: Red Hat Hardened Images.
Red Hat does not currently list a fixing RHSA for this CVE.
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 1 hour 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 1 hour 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 1 hour ago·verify at source
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