{"cve":{"cve_id":"CVE-2026-53161","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: fix use-after-free of fastrpc_user in workqueue context\n\nThere is a race between fastrpc_device_release() and the workqueue\nthat processes DSP responses. When the user closes the file descriptor,\nfastrpc_device_release() frees the fastrpc_user structure. Concurrently,\nan in-flight DSP invocation can complete and fastrpc_rpmsg_callback()\nschedules context cleanup via schedule_work(&ctx->put_work). If the\nworkqueue runs fastrpc_context_free() in parallel with or after\nfastrpc_device_release() has freed the user structure, it dereferences\nthe freed fastrpc_user. Depending on the state of the context at the\ntime of the race, any one of the following accesses can be hit:\n\n 1. fastrpc_buf_free() calls fastrpc_ipa_to_dma_addr(buf->fl->cctx, ...)\n    to strip the SID bits from the stored IOVA before passing the\n    physical address to dma_free_coherent().\n\n 2. fastrpc_free_map() reads map->fl->cctx->vmperms[0].vmid to\n    reconstruct the source permission bitmask needed for the\n    qcom_scm_assign_mem() call that returns memory from the DSP VM\n    back to HLOS.\n\n 3. fastrpc_free_map() acquires map->fl->lock to safely remove the\n    map node from the fl->maps list.\n\nThe resulting use-after-free manifests as:\n\n  pc : fastrpc_buf_free+0x38/0x80 [fastrpc]\n  lr : fastrpc_context_free+0xa8/0x1b0 [fastrpc]\n  fastrpc_context_free+0xa8/0x1b0 [fastrpc]\n  fastrpc_context_put_wq+0x78/0xa0 [fastrpc]\n  process_one_work+0x180/0x450\n  worker_thread+0x26c/0x388\n\nAdd kref-based reference counting to fastrpc_user. Have each invoke\ncontext take a reference on the user at allocation time and release it\nwhen the context is freed. Release the initial reference in\nfastrpc_device_release() at file close. Move the teardown of the user\nstructure — freeing pending contexts, maps, mmaps, and the channel\ncontext reference — into the kref release callback fastrpc_user_free(),\nso that it runs only when the last reference is dropped, regardless of\nwhether that happens at device close or after the final in-flight\ncontext completes.","published_at":"2026-06-25T08:38:42.789000Z","last_modified_at":null,"cvss_v3_score":7.8,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://git.kernel.org/stable/c/c6e5c2be09f814377d7f1ce97370a5b7b3e02814","https://git.kernel.org/stable/c/e1e3a05efe5954d5bad01157d79429d39a67a7ae","https://git.kernel.org/stable/c/d42679eef34dd590b694ce3b666c5e2ba10cd4bf","https://git.kernel.org/stable/c/df08fadcf0e5f3708365ec3b6d30b5aafd98bea1","https://git.kernel.org/stable/c/ecea4967c2bff92c2fafbc59893f711b39f7b152","https://git.kernel.org/stable/c/5278ccd357e0d7aeeb1e76c0f3e0e02894a9897c","https://git.kernel.org/stable/c/fbe0947420eec18a84638d29468c2d563ce4e6a3","https://git.kernel.org/stable/c/e85eb5feca8e254905ffa6c57a3c99c89a674a0f"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:55:28.590503Z","updated_at":"2026-06-28T23:30:50.753831Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6cffd79504ce040f460831030d3069fa1c99bb71","version_start_inclusive":true,"version_end":"c6e5c2be09f814377d7f1ce97370a5b7b3e02814","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6cffd79504ce040f460831030d3069fa1c99bb71:c6e5c2be09f814377d7f1ce97370a5b7b3e02814"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6cffd79504ce040f460831030d3069fa1c99bb71","version_start_inclusive":true,"version_end":"e1e3a05efe5954d5bad01157d79429d39a67a7ae","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6cffd79504ce040f460831030d3069fa1c99bb71:e1e3a05efe5954d5bad01157d79429d39a67a7ae"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6cffd79504ce040f460831030d3069fa1c99bb71","version_start_inclusive":true,"version_end":"d42679eef34dd590b694ce3b666c5e2ba10cd4bf","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6cffd79504ce040f460831030d3069fa1c99bb71:d42679eef34dd590b694ce3b666c5e2ba10cd4bf"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6cffd79504ce040f460831030d3069fa1c99bb71","version_start_inclusive":true,"version_end":"df08fadcf0e5f3708365ec3b6d30b5aafd98bea1","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6cffd79504ce040f460831030d3069fa1c99bb71:df08fadcf0e5f3708365ec3b6d30b5aafd98bea1"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6cffd79504ce040f460831030d3069fa1c99bb71","version_start_inclusive":true,"version_end":"ecea4967c2bff92c2fafbc59893f711b39f7b152","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6cffd79504ce040f460831030d3069fa1c99bb71:ecea4967c2bff92c2fafbc59893f711b39f7b152"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6cffd79504ce040f460831030d3069fa1c99bb71","version_start_inclusive":true,"version_end":"5278ccd357e0d7aeeb1e76c0f3e0e02894a9897c","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6cffd79504ce040f460831030d3069fa1c99bb71:5278ccd357e0d7aeeb1e76c0f3e0e02894a9897c"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6cffd79504ce040f460831030d3069fa1c99bb71","version_start_inclusive":true,"version_end":"fbe0947420eec18a84638d29468c2d563ce4e6a3","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6cffd79504ce040f460831030d3069fa1c99bb71:fbe0947420eec18a84638d29468c2d563ce4e6a3"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6cffd79504ce040f460831030d3069fa1c99bb71","version_start_inclusive":true,"version_end":"e85eb5feca8e254905ffa6c57a3c99c89a674a0f","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6cffd79504ce040f460831030d3069fa1c99bb71:e85eb5feca8e254905ffa6c57a3c99c89a674a0f"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.1","version_start_inclusive":true,"version_end":"5.1","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.1:5.1"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"5.1","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:5.1"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.10.259","version_start_inclusive":true,"version_end":"5.10.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.10.259:5.10.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.15.210","version_start_inclusive":true,"version_end":"5.15.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.15.210:5.15.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.1.176","version_start_inclusive":true,"version_end":"6.1.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.1.176:6.1.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.6.143","version_start_inclusive":true,"version_end":"6.6.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.6.143:6.6.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.94","version_start_inclusive":true,"version_end":"6.12.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.12.94:6.12.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.36","version_start_inclusive":true,"version_end":"6.18.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18.36:6.18.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.0.13","version_start_inclusive":true,"version_end":"7.0.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.0.13:7.0.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.1","version_start_inclusive":true,"version_end":"*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.1:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://git.kernel.org/stable/c/c6e5c2be09f814377d7f1ce97370a5b7b3e02814","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/e1e3a05efe5954d5bad01157d79429d39a67a7ae","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/d42679eef34dd590b694ce3b666c5e2ba10cd4bf","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/df08fadcf0e5f3708365ec3b6d30b5aafd98bea1","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/ecea4967c2bff92c2fafbc59893f711b39f7b152","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/5278ccd357e0d7aeeb1e76c0f3e0e02894a9897c","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/fbe0947420eec18a84638d29468c2d563ce4e6a3","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/e85eb5feca8e254905ffa6c57a3c99c89a674a0f","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-25T08:38:42.789000Z","label":"CVE published","source":null}]}