Linux CVE-2026-23227
HIGHCVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
6DescriptionNVD
In the Linux kernel, the following vulnerability has been resolved:
drm/exynos: vidi: use ctx->lock to protect struct vidi_context member variables related to memory alloc/free
Exynos Virtual Display driver performs memory alloc/free operations without lock protection, which easily causes concurrency problem.
For example, use-after-free can occur in race scenario like this:
CPU0 CPU1 CPU2
---- ---- ----
vidi_connection_ioctl()
if (vidi->connection) // true
drm_edid = drm_edid_alloc(); // alloc drm_edid
...
ctx->raw_edid = drm_edid;
...
drm_mode_getconnector()
drm_helper_probe_single_connector_modes()
vidi_get_modes()
if (ctx->raw_edid) // true
drm_edid_dup(ctx->raw_edid);
if (!drm_edid) // false
...
vidi_connection_ioctl()
if (vidi->connection) // false
drm_edid_free(ctx->raw_edid); // free drm_edid
...
drm_edid_alloc(drm_edid->edid)
kmemdup(edid); // UAF!!
...To prevent these vulns, at least in vidi_context, member variables related to memory alloc/free should be protected with ctx->lock.
AnalysisAI
Use-after-free in Linux kernel's Exynos Virtual Display (drm/exynos vidi) driver allows local authenticated users to potentially execute arbitrary code, escalate privileges, or cause denial of service. The vulnerability stems from missing lock protection during concurrent memory allocation/deallocation operations in the vidi_context structure. …
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RemediationAI
Within 24 hours: Identify all systems running Linux kernels with Exynos drm/vidi driver support and document current kernel versions via uname -r. Within 7 days: Apply vendor-released kernel patches to all affected systems-consult your Linux distribution (RHEL, Ubuntu, SUSE, etc.) for stable branch patch versions and test in non-production environments. …
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