{"cve":{"cve_id":"CVE-2026-53014","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/sched: act_mirred: fix wrong device for mac_header_xmit check in tcf_blockcast_redir\n\nIn tcf_blockcast_redir(), when iterating block ports to redirect\npackets to multiple devices, the mac_header_xmit flag is queried\nfrom the wrong device. The loop sends to dev_prev but queries\ndev_is_mac_header_xmit(dev) — which is the NEXT device in the\niteration, not the one being sent to.\n\nThis causes tcf_mirred_to_dev() to make incorrect decisions about\nwhether to push or pull the MAC header. When the block contains\nmixed device types (e.g., an ethernet veth and a tunnel device),\nintermediate devices get the wrong mac_header_xmit flag, leading to\nskb header corruption. In the worst case, skb_push_rcsum with an\nincorrect mac_len can exhaust headroom and panic.\n\nThe last device in the loop is handled correctly (line 365-366 uses\ndev_is_mac_header_xmit(dev_prev)), confirming this is a copy-paste\noversight for the intermediate devices.\n\nFix by using dev_prev instead of dev for the mac_header_xmit query,\nconsistent with the device actually being sent to.","published_at":"2026-06-24T16:29:24.605000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"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/8fda5174286119addd28473fb2ec5bdf521c05a8","https://git.kernel.org/stable/c/7db3e4e03032261b1b519341123fc30d995478ca","https://git.kernel.org/stable/c/4764953c4b47585eb72797b216b63a831dc0c7e6","https://git.kernel.org/stable/c/4510d140524ca7d6e772db962e013f26f09a63b1"],"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":"2026-06-28T17:55:22.518073Z","updated_at":"2026-06-28T23:30:49.890169Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"42f39036cda808d3de243192a2cf5125f12f3047","version_start_inclusive":true,"version_end":"8fda5174286119addd28473fb2ec5bdf521c05a8","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:42f39036cda808d3de243192a2cf5125f12f3047:8fda5174286119addd28473fb2ec5bdf521c05a8"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"42f39036cda808d3de243192a2cf5125f12f3047","version_start_inclusive":true,"version_end":"7db3e4e03032261b1b519341123fc30d995478ca","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:42f39036cda808d3de243192a2cf5125f12f3047:7db3e4e03032261b1b519341123fc30d995478ca"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"42f39036cda808d3de243192a2cf5125f12f3047","version_start_inclusive":true,"version_end":"4764953c4b47585eb72797b216b63a831dc0c7e6","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:42f39036cda808d3de243192a2cf5125f12f3047:4764953c4b47585eb72797b216b63a831dc0c7e6"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"42f39036cda808d3de243192a2cf5125f12f3047","version_start_inclusive":true,"version_end":"4510d140524ca7d6e772db962e013f26f09a63b1","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:42f39036cda808d3de243192a2cf5125f12f3047:4510d140524ca7d6e772db962e013f26f09a63b1"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.8","version_start_inclusive":true,"version_end":"6.8","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.8:6.8"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"6.8","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:6.8"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.91","version_start_inclusive":true,"version_end":"6.12.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.12.91:6.12.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.33","version_start_inclusive":true,"version_end":"6.18.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18.33:6.18.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.0.10","version_start_inclusive":true,"version_end":"7.0.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.0.10:7.0.*"},{"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/8fda5174286119addd28473fb2ec5bdf521c05a8","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/7db3e4e03032261b1b519341123fc30d995478ca","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/4764953c4b47585eb72797b216b63a831dc0c7e6","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/4510d140524ca7d6e772db962e013f26f09a63b1","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-24T16:29:24.605000Z","label":"CVE published","source":null}]}