{"api_version":"1","generated_at":"2026-08-24T11:52:26+00:00","cve":"CVE-2026-68236","urls":{"html":"https://cve.report/CVE-2026-68236","api":"https://cve.report/api/cve/CVE-2026-68236.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-68236","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-68236"},"summary":{"title":"drm/amd/display: set new_stream to NULL after release","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: set new_stream to NULL after release\n\nIn dm_update_crtc_state(), the skip_modeset path releases new_stream\nvia dc_stream_release() but does not set the pointer to NULL.\n\nIf a later error (e.g., color management failure) triggers the fail\nlabel, the error path calls dc_stream_release() again on the same\ndangling pointer, causing a double release and potential use-after-free.\n\nFix this by setting new_stream to NULL after the initial release.\n\n(cherry picked from commit 99f3af19073b3ddbfd96e789124cce12c4277b28)","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-10 13:20:11","updated_at":"2026-08-17 05:18:25"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/0676fecbb5242aa22c057e78326d6d6041db034c","name":"https://git.kernel.org/stable/c/0676fecbb5242aa22c057e78326d6d6041db034c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9fa26b9eed6195bf840f39ac183b9a6237548755","name":"https://git.kernel.org/stable/c/9fa26b9eed6195bf840f39ac183b9a6237548755","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ba8bf1dcbb44773e7a0fd13b42925c644e0d5e76","name":"https://git.kernel.org/stable/c/ba8bf1dcbb44773e7a0fd13b42925c644e0d5e76","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5182e442e61397d446c36995b8f5676942d35b82","name":"https://git.kernel.org/stable/c/5182e442e61397d446c36995b8f5676942d35b82","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/679f23f0a3606afcef1ffabd72222f00a54ad9e3","name":"https://git.kernel.org/stable/c/679f23f0a3606afcef1ffabd72222f00a54ad9e3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-68236","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68236","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f ba8bf1dcbb44773e7a0fd13b42925c644e0d5e76 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f 5182e442e61397d446c36995b8f5676942d35b82 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f 679f23f0a3606afcef1ffabd72222f00a54ad9e3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f 0676fecbb5242aa22c057e78326d6d6041db034c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"68236","cve":"CVE-2026-68236","epss":"0.001250000","percentile":"0.026070000","score_date":"2026-08-17","updated_at":"2026-08-18 00:11:47"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ba8bf1dcbb44773e7a0fd13b42925c644e0d5e76","status":"affected","version":"9b690ef3c70422cdcd0cf912db33f2c92ef4a53f","versionType":"git"},{"lessThan":"5182e442e61397d446c36995b8f5676942d35b82","status":"affected","version":"9b690ef3c70422cdcd0cf912db33f2c92ef4a53f","versionType":"git"},{"lessThan":"679f23f0a3606afcef1ffabd72222f00a54ad9e3","status":"affected","version":"9b690ef3c70422cdcd0cf912db33f2c92ef4a53f","versionType":"git"},{"lessThan":"0676fecbb5242aa22c057e78326d6d6041db034c","status":"affected","version":"9b690ef3c70422cdcd0cf912db33f2c92ef4a53f","versionType":"git"},{"lessThan":"9fa26b9eed6195bf840f39ac183b9a6237548755","status":"affected","version":"9b690ef3c70422cdcd0cf912db33f2c92ef4a53f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.15"},{"lessThan":"4.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.148","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.101","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.148","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.101","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.42","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.6","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"4.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: set new_stream to NULL after release\n\nIn dm_update_crtc_state(), the skip_modeset path releases new_stream\nvia dc_stream_release() but does not set the pointer to NULL.\n\nIf a later error (e.g., color management failure) triggers the fail\nlabel, the error path calls dc_stream_release() again on the same\ndangling pointer, causing a double release and potential use-after-free.\n\nFix this by setting new_stream to NULL after the initial release.\n\n(cherry picked from commit 99f3af19073b3ddbfd96e789124cce12c4277b28)"}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - The bug is reached through the DRM atomic modeset ioctl (DRM_IOCTL_MODE_ATOMIC) on a local /dev/dri/card* node of an AMD GPU; there is no network or remote input path into dm_update_crtc_state().\nAC:L - A single atomic commit that requests a mode change while attaching a wrong-sized DEGAMMA_LUT blob deterministically drives amdgpu_dm_check_crtc_color_mgmt() to -EINVAL and hits the double dc_stream_release(); no race and no uncontrolled precondition, and TEST_ONLY commits let the attacker repeat it freely to groom the heap.\nPR:L - The atomic ioctl is gated only by DRM master on the card node, which any unprivileged local user on a graphical seat or an unused VT can hold; no CAP_SYS_ADMIN or root is needed.\nUI:N - The attacker performs the whole sequence with its own ioctl calls; no action by another user or administrator is required, and TEST_ONLY commits do not even disturb the display.\nS:U - The corrupted dc_stream_state and the resulting freed-memory reuse stay within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The extra kref_put() frees the dc_stream_state while the CRTC state and the DC context still reference it; reading through those dangling pointers after the slab is reallocated leaks adjacent kernel object contents and pointers, and the attacker can spray to control what lands there.\nI:H - The reference-count underflow yields a use-after-free/double-free: subsequent kref_put() writes into reallocated slab memory and dc_stream_free() kfree()s an attacker-influenced update_scratch pointer, giving write and arbitrary-free primitives usable for privilege escalation.\nA:H - Even without exploitation the premature free causes dereference of freed stream/sink/link structures during atomic state unwind, producing a kernel oops or panic and killing the display pipeline; it can be triggered repeatedly."}]}],"providerMetadata":{"dateUpdated":"2026-08-17T05:01:25.183Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/ba8bf1dcbb44773e7a0fd13b42925c644e0d5e76"},{"url":"https://git.kernel.org/stable/c/5182e442e61397d446c36995b8f5676942d35b82"},{"url":"https://git.kernel.org/stable/c/679f23f0a3606afcef1ffabd72222f00a54ad9e3"},{"url":"https://git.kernel.org/stable/c/0676fecbb5242aa22c057e78326d6d6041db034c"},{"url":"https://git.kernel.org/stable/c/9fa26b9eed6195bf840f39ac183b9a6237548755"}],"title":"drm/amd/display: set new_stream to NULL after release","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-68236","datePublished":"2026-08-10T12:01:01.114Z","dateReserved":"2026-07-30T09:28:09.376Z","dateUpdated":"2026-08-17T05:01:25.183Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-10 13:20:11","lastModifiedDate":"2026-08-17 05:18:25","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"68236","Ordinal":"1","Title":"drm/amd/display: set new_stream to NULL after release","CVE":"CVE-2026-68236","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"68236","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: set new_stream to NULL after release\n\nIn dm_update_crtc_state(), the skip_modeset path releases new_stream\nvia dc_stream_release() but does not set the pointer to NULL.\n\nIf a later error (e.g., color management failure) triggers the fail\nlabel, the error path calls dc_stream_release() again on the same\ndangling pointer, causing a double release and potential use-after-free.\n\nFix this by setting new_stream to NULL after the initial release.\n\n(cherry picked from commit 99f3af19073b3ddbfd96e789124cce12c4277b28)","Type":"Description","Title":"drm/amd/display: set new_stream to NULL after release"}]}}}