--- id: CVE-2026-68236 title: |- In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: set new_stream to NULL after release In dm_update_crtc_state(), the skip_modeset path releases new_stream via dc_stream_release() but does not set the… summary: |- In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: set new_stream to NULL after release In dm_update_crtc_state(), the skip_modeset path releases new_stream via dc_stream_release() but does not set the… severity: high cvss: 7.8 cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H' vendor: Linux product: Linux affected: - >- Linux >= 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f < 92b7c6e3a1546c6db868b07e93fa6fb950d1d3a0 - >- Linux >= 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f < bf9c06c70f496f1ba4474caf95c69696c828340e - >- Linux >= 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f < 01ba5b36898d6258f584269537cc49e7b05cf7c6 - >- Linux >= 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f < ba8bf1dcbb44773e7a0fd13b42925c644e0d5e76 - >- Linux >= 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f < 5182e442e61397d446c36995b8f5676942d35b82 - >- Linux >= 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f < 679f23f0a3606afcef1ffabd72222f00a54ad9e3 - >- Linux >= 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f < 0676fecbb5242aa22c057e78326d6d6041db034c - >- Linux >= 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f < 9fa26b9eed6195bf840f39ac183b9a6237548755 - Linux 4.15 published: '2026-08-10' updated: '2026-10-03' sourceUpdated: '2026-10-03T11:17:36.130' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-68236' references: - url: 'https://git.kernel.org/stable/c/01ba5b36898d6258f584269537cc49e7b05cf7c6' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/0676fecbb5242aa22c057e78326d6d6041db034c' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/5182e442e61397d446c36995b8f5676942d35b82' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/679f23f0a3606afcef1ffabd72222f00a54ad9e3' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/92b7c6e3a1546c6db868b07e93fa6fb950d1d3a0' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/9fa26b9eed6195bf840f39ac183b9a6237548755' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/ba8bf1dcbb44773e7a0fd13b42925c644e0d5e76' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/bf9c06c70f496f1ba4474caf95c69696c828340e' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68236.json - url: 'https://access.redhat.com/security/cve/CVE-2026-68236' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2513148' - url: 'https://www.cve.org/CVERecord?id=CVE-2026-68236' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-68236' - url: >- https://lore.kernel.org/linux-cve-announce/2026081017-CVE-2026-68236-54da@gregkh/T - url: 'https://access.redhat.com/errata/RHSA-2026:81552' - url: 'https://access.redhat.com/errata/RHSA-2026:82806' - url: 'https://access.redhat.com/errata/RHSA-2026:88477' - url: 'https://access.redhat.com/errata/RHSA-2026:82807' tags: - nvd - cve.org - csaf - vex - red-hat epss: 0.00126 epssPercentile: 0.02277 ingestedAt: '2026-10-03T11:43:42.116Z' patched: - enterprise_linux_appstream_v_9 - enterprise_linux_baseos_v_9 - enterprise_linux_codeready_linux_builder_v_9 - enterprise_linux_nfv_v_8 - enterprise_linux_real_time_for_nfv_v_9 - enterprise_linux_rt_v_8 - enterprise_linux_real_time_v_9 cwe: - CWE-763 scores: nvd: 7.8 vendor: 7 cna: 7.8 ssvc: exploitation: none automatable: 'no' technicalImpact: total timestamp: '2026-10-16T15:46:01.329903Z' --- ## Overview In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: set new_stream to NULL after release In dm_update_crtc_state(), the skip_modeset path releases new_stream via dc_stream_release() but does not set the pointer to NULL. If a later error (e.g., color management failure) triggers the fail label, the error path calls dc_stream_release() again on the same dangling pointer, causing a double release and potential use-after-free. Fix this by setting new_stream to NULL after the initial release. (cherry picked from commit 99f3af19073b3ddbfd96e789124cce12c4277b28) ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Vendor advisories - **RHSA-2026:81552** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9), Red Hat Enterprise Linux Real Time (v. 9) · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:81552) - **RHSA-2026:82806** · Red Hat · fixed in: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8) · released 2026-10-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:82806) - **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 9 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68236.json) - **RHSA-2026:88477** · Red Hat · fixed in: 10Base-SMTV, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Hidden (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10), … · released 2026-10-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:88477) - **RHSA-2026:82807** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-10-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:82807)