{"cve":{"cve_id":"CVE-2026-53194","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\nUSB: serial: kl5kusb105: fix bulk-out buffer overflow\n\nklsi_105_prepare_write_buffer() is called by the generic write path\nwith the bulk-out buffer and its size (bulk_out_size, 64 bytes). It\nstores a two-byte length header at the start of the buffer and copies\nthe payload from the write fifo starting at buf + KLSI_HDR_LEN, but\npasses the full buffer size as the number of bytes to copy:\n\n  count = kfifo_out_locked(&port->write_fifo, buf + KLSI_HDR_LEN,\n                           size, &port->lock);\n\nWhen the fifo holds at least size bytes, size bytes are copied starting\ntwo bytes into the size-byte buffer, writing KLSI_HDR_LEN bytes past its\nend. Copy at most size - KLSI_HDR_LEN bytes instead, leaving room for\nthe header as safe_serial already does.\n\nWriting bulk_out_size or more bytes to the tty triggers a slab\nout-of-bounds write, observed with KASAN by emulating the device with\ndummy_hcd and raw-gadget:\n\n  BUG: KASAN: slab-out-of-bounds in kfifo_copy_out+0x83/0xc0\n  Write of size 64 at addr ffff888112c62202 by task python3\n   kfifo_copy_out\n   klsi_105_prepare_write_buffer [kl5kusb105]\n   usb_serial_generic_write_start [usbserial]\n  Allocated by task 139:\n   usb_serial_probe [usbserial]\n  The buggy address is located 2 bytes inside of allocated 64-byte region\n\nThe out-of-bounds write no longer occurs with this change applied.","published_at":"2026-06-25T08:39:05.017000Z","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/60af1fd82983c26604102e63a3fcc822c186cceb","https://git.kernel.org/stable/c/0a57320f71941d4e0b1307453c9a1f0939afe666","https://git.kernel.org/stable/c/14147b7963685957839c76ba8094924e22777d79","https://git.kernel.org/stable/c/a1288cd700f721c1a119c4f1e8efa234e59caada","https://git.kernel.org/stable/c/70d86e355c564b5510fde61361df014f5476c83e","https://git.kernel.org/stable/c/372f33ebed747d91870f57c0a2e62884a870bffa","https://git.kernel.org/stable/c/bde742b076cbe26ecc89c8c68c76ae076a524d02","https://git.kernel.org/stable/c/96d47e40bf9db4a9efd5c8fb53287a508d165f14"],"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":"2026-06-28T23:30:51.545322Z"},"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":"7.1","version_start_inclusive":true,"version_end":"*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.1:*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"60b3013cdaf3fa8a17243ca46b19db3cbe08d943","version_start_inclusive":true,"version_end":"60af1fd82983c26604102e63a3fcc822c186cceb","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:60b3013cdaf3fa8a17243ca46b19db3cbe08d943:60af1fd82983c26604102e63a3fcc822c186cceb"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"60b3013cdaf3fa8a17243ca46b19db3cbe08d943","version_start_inclusive":true,"version_end":"0a57320f71941d4e0b1307453c9a1f0939afe666","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:60b3013cdaf3fa8a17243ca46b19db3cbe08d943:0a57320f71941d4e0b1307453c9a1f0939afe666"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"60b3013cdaf3fa8a17243ca46b19db3cbe08d943","version_start_inclusive":true,"version_end":"14147b7963685957839c76ba8094924e22777d79","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:60b3013cdaf3fa8a17243ca46b19db3cbe08d943:14147b7963685957839c76ba8094924e22777d79"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"60b3013cdaf3fa8a17243ca46b19db3cbe08d943","version_start_inclusive":true,"version_end":"a1288cd700f721c1a119c4f1e8efa234e59caada","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:60b3013cdaf3fa8a17243ca46b19db3cbe08d943:a1288cd700f721c1a119c4f1e8efa234e59caada"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"60b3013cdaf3fa8a17243ca46b19db3cbe08d943","version_start_inclusive":true,"version_end":"70d86e355c564b5510fde61361df014f5476c83e","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:60b3013cdaf3fa8a17243ca46b19db3cbe08d943:70d86e355c564b5510fde61361df014f5476c83e"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"60b3013cdaf3fa8a17243ca46b19db3cbe08d943","version_start_inclusive":true,"version_end":"372f33ebed747d91870f57c0a2e62884a870bffa","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:60b3013cdaf3fa8a17243ca46b19db3cbe08d943:372f33ebed747d91870f57c0a2e62884a870bffa"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"60b3013cdaf3fa8a17243ca46b19db3cbe08d943","version_start_inclusive":true,"version_end":"bde742b076cbe26ecc89c8c68c76ae076a524d02","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:60b3013cdaf3fa8a17243ca46b19db3cbe08d943:bde742b076cbe26ecc89c8c68c76ae076a524d02"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"60b3013cdaf3fa8a17243ca46b19db3cbe08d943","version_start_inclusive":true,"version_end":"96d47e40bf9db4a9efd5c8fb53287a508d165f14","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:60b3013cdaf3fa8a17243ca46b19db3cbe08d943:96d47e40bf9db4a9efd5c8fb53287a508d165f14"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"2.6.35","version_start_inclusive":true,"version_end":"2.6.35","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:2.6.35:2.6.35"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"2.6.35","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:2.6.35"},{"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.*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://git.kernel.org/stable/c/60af1fd82983c26604102e63a3fcc822c186cceb","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/0a57320f71941d4e0b1307453c9a1f0939afe666","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/14147b7963685957839c76ba8094924e22777d79","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/a1288cd700f721c1a119c4f1e8efa234e59caada","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/70d86e355c564b5510fde61361df014f5476c83e","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/372f33ebed747d91870f57c0a2e62884a870bffa","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/bde742b076cbe26ecc89c8c68c76ae076a524d02","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/96d47e40bf9db4a9efd5c8fb53287a508d165f14","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-25T08:39:05.017000Z","label":"CVE published","source":null}]}