Description
In the Linux kernel, the following vulnerability has been resolved:

drm/i915: clear CRTC color blob pointers after dropping refs

intel_crtc_put_color_blobs() drops the CRTC color blob references, but
leaves the corresponding pointers unchanged.

This can matter in intel_crtc_prepare_cleared_state(), which frees the
old CRTC hw state before calling intel_dp_tunnel_atomic_clear_stream_bw().
The latter can fail while looking up the DP tunnel group state, for
example with -EDEADLK.

If that happens, the function returns without completing the cleared
state preparation. The failed atomic state will then be cleared by the
atomic core and intel_crtc_free_hw_state() can be called again for the
same state, dropping the same blob references again.

Clear the blob pointers after dropping the references so repeated cleanup
of the same CRTC hw state is safe.

(cherry picked from commit d5005addb5f68e8a0edce249506757bdc9e3d8c8)
Published: 2026-08-15
Score: n/a
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability arises when the kernel drops references to CRTC color blobs but fails to clear the corresponding pointers. If the same hardware state is subsequently cleaned up, the code attempts to drop the identical references again, which can lead to double free or use‑after‑free errors. The result is a crash or undefined behavior in the DRM subsystem, effectively causing a denial of service or kernel instability. The weakness is a memory‑management flaw, specifically a use‑after‑free scenario.

Affected Systems

The affected product is the Linux kernel; no specific kernel version information is provided in the CVE data, so any release that lacks the commit that clears the pointers is potentially vulnerable.

Risk and Exploitability

The CVSS score and EPSS data are not available, and the vulnerability is not listed in CISA KEV, which indicates that no public exploitation has been reported. The risk is localized to systems running a kernel that has not been patched with this fix. An attacker would need some method to trigger repeated CRTC state cleanup – for example, by driving the DRM subsystem into a failure path – so the immediate threat level to unprivileged users is low. Nevertheless, the flaw can cause kernel crashes, which is a serious reliability issue.

Generated by OpenCVE AI on August 15, 2026 at 11:39 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update the Linux kernel to a version that contains the described commit.
  • Reboot the system after the kernel upgrade to load the patched code.
  • Continuously monitor kernel logs (e.g., via dmesg) for DP tunnel or CRTC errors to verify that the issue has been resolved.

Generated by OpenCVE AI on August 15, 2026 at 11:39 UTC.

Tracking

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Advisories

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History

Sat, 15 Aug 2026 12:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Sat, 15 Aug 2026 06:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: drm/i915: clear CRTC color blob pointers after dropping refs intel_crtc_put_color_blobs() drops the CRTC color blob references, but leaves the corresponding pointers unchanged. This can matter in intel_crtc_prepare_cleared_state(), which frees the old CRTC hw state before calling intel_dp_tunnel_atomic_clear_stream_bw(). The latter can fail while looking up the DP tunnel group state, for example with -EDEADLK. If that happens, the function returns without completing the cleared state preparation. The failed atomic state will then be cleared by the atomic core and intel_crtc_free_hw_state() can be called again for the same state, dropping the same blob references again. Clear the blob pointers after dropping the references so repeated cleanup of the same CRTC hw state is safe. (cherry picked from commit d5005addb5f68e8a0edce249506757bdc9e3d8c8)
Title drm/i915: clear CRTC color blob pointers after dropping refs
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-15T05:57:00.234Z

Reserved: 2026-08-09T03:40:39.931Z

Link: CVE-2026-72452

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-15T06:22:19.183

Modified: 2026-08-15T06:22:19.183

Link: CVE-2026-72452

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-15T11:45:03Z

Weaknesses