{"cve":{"cve_id":"CVE-2026-53175","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\ninet: frags: fix use-after-free caused by the fqdir_pre_exit() flush\n\nOn netns teardown, fqdir_pre_exit() walks the fqdir rhashtable and\nflushes every fragment queue that is not yet complete using\ninet_frag_queue_flush(). That helper frees all the skbs queued on the\nfragment queue but does not set INET_FRAG_COMPLETE, and leaves\nq->fragments_tail and q->last_run_head pointing at the freed skbs.\nThe queue itself stays in the rhashtable.\n\nfqdir_pre_exit() first lowers high_thresh to 0 to stop new queue lookups,\nbut it cannot stop a fragment that already obtained the queue through\ninet_frag_find() earlier and stalled just before taking the queue lock.\nOnce that fragment resumes after the flush and takes the queue lock,\nit passes the INET_FRAG_COMPLETE check and then dereferences the freed\nfragments_tail. inet_frag_queue_insert() reads FRAG_CB() and ->len of\nthat pointer and, on the append path, writes ->next_frag, causing a\nslab use-after-free. IPv6, nf_conntrack_reasm6 and 6lowpan reassembly\nshare the same flush path and are affected as well.\n\nReset rb_fragments, fragments_tail and last_run_head in\ninet_frag_queue_flush() so a flushed queue no longer points at the\nfreed skbs. A fragment that resumes after the flush and takes the\nqueue lock then finds an empty queue and starts a new run instead of\ndereferencing the freed fragments_tail. ip_frag_reinit() already\nperformed this reset after its own flush, so drop the now duplicate\ncode there.","published_at":"2026-06-25T08:38:52.034000Z","last_modified_at":null,"cvss_v3_score":9.8,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"CRITICAL","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/0e823ca0e7391630784ae7dd0981b7ad170a93d9","https://git.kernel.org/stable/c/c22599cc90e1cd5f8129c8670bd68a02ff7177b4","https://git.kernel.org/stable/c/89b909e9704587bfecc1aab1d37e98faee03b9f9","https://git.kernel.org/stable/c/010c3313a4d178dc2d3ce958d2e5cb055e2864c1","https://git.kernel.org/stable/c/32594b09854970d7ba83eb2dc8c69a2edd158c8e"],"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":"CRITICAL","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"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":"22ee4010866da81aeee08e1ea3fddbe418feb212","version_start_inclusive":true,"version_end":"0e823ca0e7391630784ae7dd0981b7ad170a93d9","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:22ee4010866da81aeee08e1ea3fddbe418feb212:0e823ca0e7391630784ae7dd0981b7ad170a93d9"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"543555954b1ee8d1903a7020324efb41b0c97428","version_start_inclusive":true,"version_end":"c22599cc90e1cd5f8129c8670bd68a02ff7177b4","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:543555954b1ee8d1903a7020324efb41b0c97428:c22599cc90e1cd5f8129c8670bd68a02ff7177b4"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"c70df25214ac9b32b53e18e6ae3b8f073ffa6903","version_start_inclusive":true,"version_end":"89b909e9704587bfecc1aab1d37e98faee03b9f9","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:c70df25214ac9b32b53e18e6ae3b8f073ffa6903:89b909e9704587bfecc1aab1d37e98faee03b9f9"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"006a5035b495dec008805df249f92c22c89c3d2e","version_start_inclusive":true,"version_end":"010c3313a4d178dc2d3ce958d2e5cb055e2864c1","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:006a5035b495dec008805df249f92c22c89c3d2e:010c3313a4d178dc2d3ce958d2e5cb055e2864c1"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"006a5035b495dec008805df249f92c22c89c3d2e","version_start_inclusive":true,"version_end":"32594b09854970d7ba83eb2dc8c69a2edd158c8e","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:006a5035b495dec008805df249f92c22c89c3d2e:32594b09854970d7ba83eb2dc8c69a2edd158c8e"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.93","version_start_inclusive":true,"version_end":"6.12.94","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6.12.93:6.12.94"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.3","version_start_inclusive":true,"version_end":"6.18.36","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6.18.3:6.18.36"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.19","version_start_inclusive":true,"version_end":"6.19","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.19:6.19"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"6.19","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:6.19"},{"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/0e823ca0e7391630784ae7dd0981b7ad170a93d9","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/c22599cc90e1cd5f8129c8670bd68a02ff7177b4","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/89b909e9704587bfecc1aab1d37e98faee03b9f9","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/010c3313a4d178dc2d3ce958d2e5cb055e2864c1","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/32594b09854970d7ba83eb2dc8c69a2edd158c8e","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-25T08:38:52.034000Z","label":"CVE published","source":null}]}