{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2024-47720", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-47720", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-10-21T11:53:50.178Z", "updatedAt": "2026-05-11T20:39:28.989Z", "importedAt": "2026-10-24T01:57:16.009Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "drm/amd/display: Add null check for set_output_gamma in dcn30_set_output_transfer_func", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Add null check for set_output_gamma in dcn30_set_output_transfer_func\n\nThis commit adds a null check for the set_output_gamma function pointer\nin the dcn30_set_output_transfer_func function. Previously,\nset_output_gamma was being checked for nullity at line 386, but then it\nwas being dereferenced without any nullity check at line 401. This\ncould potentially lead to a null pointer dereference error if\nset_output_gamma is indeed null.\n\nTo fix this, we now ensure that set_output_gamma is not null before\ndereferencing it. We do this by adding a nullity check for\nset_output_gamma before the call to set_output_gamma at line 401. If\nset_output_gamma is null, we log an error message and do not call the\nfunction.\n\nThis fix prevents a potential null pointer dereference error.\n\ndrivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn30/dcn30_hwseq.c:401 dcn30_set_output_transfer_func()\nerror: we previously assumed 'mpc->funcs->set_output_gamma' could be null (see line 386)\n\ndrivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn30/dcn30_hwseq.c\n 373 bool dcn30_set_output_transfer_func(struct dc *dc,\n 374 struct pipe_ctx *pipe_ctx,\n 375 const struct dc_stream_state *stream)\n 376 {\n 377 int mpcc_id = pipe_ctx->plane_res.hubp->inst;\n 378 struct mpc *mpc = pipe_ctx->stream_res.opp->ctx->dc->res_pool->mpc;\n 379 const struct pwl_params *params = NULL;\n 380 bool ret = false;\n 381\n 382 /* program OGAM or 3DLUT only for the top pipe*/\n 383 if (pipe_ctx->top_pipe == NULL) {\n 384 /*program rmu shaper and 3dlut in MPC*/\n 385 ret = dcn30_set_mpc_shaper_3dlut(pipe_ctx, stream);\n 386 if (ret == false && mpc->funcs->set_output_gamma) {\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ If this is NULL\n\n 387 if (stream->out_transfer_func.type == TF_TYPE_HWPWL)\n 388 params = &stream->out_transfer_func.pwl;\n 389 else if (pipe_ctx->stream->out_transfer_func.type ==\n 390 TF_TYPE_DISTRIBUTED_POINTS &&\n 391 cm3_helper_translate_curve_to_hw_format(\n 392 &stream->out_transfer_func,\n 393 &mpc->blender_params, false))\n 394 params = &mpc->blender_params;\n 395 /* there are no ROM LUTs in OUTGAM */\n 396 if (stream->out_transfer_func.type == TF_TYPE_PREDEFINED)\n 397 BREAK_TO_DEBUGGER();\n 398 }\n 399 }\n 400\n--> 401 mpc->funcs->set_output_gamma(mpc, mpcc_id, params);\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Then it will crash\n\n 402 return ret;\n 403 }", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "d99f13878d6f9c286b13860d8bf0b4db9ffb189a", "status": "affected", "versionType": "git", "lessThan": "44948d3cb943602ba4a0b5ed3c91ae0525838fb1" }, { "version": "d99f13878d6f9c286b13860d8bf0b4db9ffb189a", "status": "affected", "versionType": "git", "lessThan": "64886a4e6f1dce843c0889505cf0673b5211e16a" }, { "version": "d99f13878d6f9c286b13860d8bf0b4db9ffb189a", "status": "affected", "versionType": "git", "lessThan": "ddf9ff244d704e1903533f7be377615ed34b83e7" }, { "version": "d99f13878d6f9c286b13860d8bf0b4db9ffb189a", "status": "affected", "versionType": "git", "lessThan": "84edd5a3f5fa6aafa4afcaf9f101f46426c620c9" }, { "version": "d99f13878d6f9c286b13860d8bf0b4db9ffb189a", "status": "affected", "versionType": "git", "lessThan": "72ee32d0907364104fbcf4f68dd5ae63cd8eae9e" }, { "version": "d99f13878d6f9c286b13860d8bf0b4db9ffb189a", "status": "affected", "versionType": "git", "lessThan": "08ae395ea22fb3d9b318c8bde28c0dfd2f5fa4d2" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.9", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.9" }, { "version": "5.15.168", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.113", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.54", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.10.13", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.10.*" }, { "version": "6.11.2", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.11.*" }, { "version": "6.12", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }