drm/exynos: vidi: use ctx->lock to protect struct vidi_context member variables related to memory alloc/free

MITRE NVD CVE.ORG Print: PDF PDF

Summary

CVECVE-2026-23227
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-02-18 16:22:32 UTC
Updated2026-04-02 15:16:24 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-416

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d3b62dbfc7b9bb013926f56db79b60f6c18c392f 92dd1f38d7db75374dcdaf54f1d79d67bffd54e5 git Not specified
CNA Linux Linux affected d3b62dbfc7b9bb013926f56db79b60f6c18c392f 1b24d3e8792bcc050c70e8e0dea6b49c4fc63b13 git Not specified
CNA Linux Linux affected d3b62dbfc7b9bb013926f56db79b60f6c18c392f abfdf449fb3d7b42e85a1ad1c8694b768b1582f4 git Not specified
CNA Linux Linux affected d3b62dbfc7b9bb013926f56db79b60f6c18c392f 60b75407c172e1f341a8a5097c5cbc97dbbdd893 git Not specified
CNA Linux Linux affected d3b62dbfc7b9bb013926f56db79b60f6c18c392f 0cd2c155740dbd00868ac5a8ae5d14cd6b9ed385 git Not specified
CNA Linux Linux affected d3b62dbfc7b9bb013926f56db79b60f6c18c392f 52b330799e2d6f825ae2bb74662ec1b10eb954bb git Not specified
CNA Linux Linux affected 3.6 Not specified
CNA Linux Linux unaffected 3.6 semver Not specified
CNA Linux Linux unaffected 6.1.167 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.130 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.77 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.11 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.1 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/0cd2c155740dbd00868ac5a8ae5d14cd6b9ed385 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1b24d3e8792bcc050c70e8e0dea6b49c4fc63b13 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/abfdf449fb3d7b42e85a1ad1c8694b768b1582f4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/52b330799e2d6f825ae2bb74662ec1b10eb954bb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/60b75407c172e1f341a8a5097c5cbc97dbbdd893 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/92dd1f38d7db75374dcdaf54f1d79d67bffd54e5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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