Medium [CVE-2026-68248] Linux kernel: drm/i915 graphics driver denial of service due to improper error handling
This medium-severity Red Hat Linux advisory covers CVE-2026-68248 affecting Red Hat Enterprise Linux 9, Red Hat package: kernel-rt.
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Summary
In the Linux kernel, the following vulnerability has been resolved: drm/i915: Return NULL on error in active_instance Avoid returning &node->base when node is NULL due to OOM during GFP_ATOMIC allocation.
Discovered using AI-assisted static analysis confirmed by Intel Product Security. (cherry picked from commit 6029bc064f0b1bac184203a50fbaaf070fa18832) This vulnerability occurs when the system experiences an Out-Of-Memory (OOM) condition during a specific memory allocation.
An attacker could potentially trigger this condition, leading to an improper return value and causing a system crash, resulting in a Denial of Service (DoS). Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-476. Affected Red Hat products: Red Hat Enterprise Linux 9.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: kernel-rt.
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 3 hours 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 3 hours 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 3 hours ago·verify at source
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