{"cve":{"cve_id":"CVE-2026-53223","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\nnet: guard timestamp cmsgs to real error queue skbs\n\nskb_is_err_queue() treats PACKET_OUTGOING as the sole marker for an skb\nfrom sk_error_queue. That assumption is not true for AF_PACKET sockets:\noutgoing packet taps are also delivered to packet sockets with\nskb->pkt_type == PACKET_OUTGOING, but their skb->cb is owned by AF_PACKET\ninstead of struct sock_exterr_skb.\n\nIf such an skb is received with timestamping enabled, the generic\ntimestamp cmsg path can read AF_PACKET control-buffer state as\nsock_exterr_skb::opt_stats. With SO_RXQ_OVFL enabled, the packet drop\ncounter overlaps opt_stats. An odd drop count makes the path emit\nSCM_TIMESTAMPING_OPT_STATS with skb->len and skb->data. For non-linear\nskbs this copies past the linear head and can trigger hardened usercopy or\ndisclose adjacent heap contents.\n\nKeep skb_is_err_queue() local to net/socket.c, but make it verify that\nthe PACKET_OUTGOING marker is paired with the sock_rmem_free destructor\ninstalled by sock_queue_err_skb(). AF_PACKET receive skbs use normal\nreceive ownership and no longer pass as error-queue skbs, while legitimate\nsk_error_queue entries keep the PACKET_OUTGOING marker and sock_rmem_free\nownership.","published_at":"2026-06-25T08:39:24.588000Z","last_modified_at":null,"cvss_v3_score":7.1,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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/24a0d548d3a765cd4558224e4f8e06e14cba26e3","https://git.kernel.org/stable/c/71ff5cdd5da61d0438e902aa0fd68c28bc901abe","https://git.kernel.org/stable/c/ad9a0374ee6d11048e1f74cd5180bad58b9848b4","https://git.kernel.org/stable/c/b903e9b5629ec8dd6db92174070045bf81ad7060","https://git.kernel.org/stable/c/e0665b2a8e90bb08bd205062c75662b502d31797","https://git.kernel.org/stable/c/3dde4fb941fa5649ab809f6cd3e20e0c424a4e31","https://git.kernel.org/stable/c/eb51a9ad3ceb01bc6c0fb608dbc856e03ee6f24a","https://git.kernel.org/stable/c/1ee90b77b727df903033db873c75caac5c27ec98"],"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":"N","value_label":"None"},{"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":"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":"8605330aac5a5785630aec8f64378a54891937cc","version_start_inclusive":true,"version_end":"24a0d548d3a765cd4558224e4f8e06e14cba26e3","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:8605330aac5a5785630aec8f64378a54891937cc:24a0d548d3a765cd4558224e4f8e06e14cba26e3"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"8605330aac5a5785630aec8f64378a54891937cc","version_start_inclusive":true,"version_end":"71ff5cdd5da61d0438e902aa0fd68c28bc901abe","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:8605330aac5a5785630aec8f64378a54891937cc:71ff5cdd5da61d0438e902aa0fd68c28bc901abe"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"8605330aac5a5785630aec8f64378a54891937cc","version_start_inclusive":true,"version_end":"ad9a0374ee6d11048e1f74cd5180bad58b9848b4","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:8605330aac5a5785630aec8f64378a54891937cc:ad9a0374ee6d11048e1f74cd5180bad58b9848b4"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"8605330aac5a5785630aec8f64378a54891937cc","version_start_inclusive":true,"version_end":"b903e9b5629ec8dd6db92174070045bf81ad7060","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:8605330aac5a5785630aec8f64378a54891937cc:b903e9b5629ec8dd6db92174070045bf81ad7060"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"8605330aac5a5785630aec8f64378a54891937cc","version_start_inclusive":true,"version_end":"e0665b2a8e90bb08bd205062c75662b502d31797","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:8605330aac5a5785630aec8f64378a54891937cc:e0665b2a8e90bb08bd205062c75662b502d31797"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"8605330aac5a5785630aec8f64378a54891937cc","version_start_inclusive":true,"version_end":"3dde4fb941fa5649ab809f6cd3e20e0c424a4e31","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:8605330aac5a5785630aec8f64378a54891937cc:3dde4fb941fa5649ab809f6cd3e20e0c424a4e31"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"8605330aac5a5785630aec8f64378a54891937cc","version_start_inclusive":true,"version_end":"eb51a9ad3ceb01bc6c0fb608dbc856e03ee6f24a","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:8605330aac5a5785630aec8f64378a54891937cc:eb51a9ad3ceb01bc6c0fb608dbc856e03ee6f24a"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"8605330aac5a5785630aec8f64378a54891937cc","version_start_inclusive":true,"version_end":"1ee90b77b727df903033db873c75caac5c27ec98","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:8605330aac5a5785630aec8f64378a54891937cc:1ee90b77b727df903033db873c75caac5c27ec98"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"cdaf15b43bd31003220cb080bcbbd57787a2fca9","version_start_inclusive":true,"version_end":"cdaf15b43bd31003220cb080bcbbd57787a2fca9","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:cdaf15b43bd31003220cb080bcbbd57787a2fca9:cdaf15b43bd31003220cb080bcbbd57787a2fca9"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"4.10.14","version_start_inclusive":true,"version_end":"4.11","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:4.10.14:4.11"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"4.11","version_start_inclusive":true,"version_end":"4.11","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:4.11:4.11"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"4.11","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:4.11"},{"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":"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/24a0d548d3a765cd4558224e4f8e06e14cba26e3","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/71ff5cdd5da61d0438e902aa0fd68c28bc901abe","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/ad9a0374ee6d11048e1f74cd5180bad58b9848b4","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/b903e9b5629ec8dd6db92174070045bf81ad7060","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/e0665b2a8e90bb08bd205062c75662b502d31797","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/3dde4fb941fa5649ab809f6cd3e20e0c424a4e31","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/eb51a9ad3ceb01bc6c0fb608dbc856e03ee6f24a","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/1ee90b77b727df903033db873c75caac5c27ec98","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-25T08:39:24.588000Z","label":"CVE published","source":null}]}