{“lastseen”:””,”description”:”In the Linux kernel, the following vulnerability has been resolved:\\n\\nflow_dissector: do not dissect PPPoE PFC frames\\n\\nRFC 2516 Section 7 states that Protocol Field Compression (PFC) is NOT\\nRECOMMENDED for PPPoE. In practice, pppd does not support negotiating\\nPFC for PPPoE sessions, and the flow dissector driver has assumed an\\nuncompressed frame until the blamed commit.\\n\\nDuring the review process of that commit [1], support for PFC is\\nsuggested. However, having a compressed (1-byte) protocol field means\\nthe subsequent PPP payload is shifted by one byte, causing 4-byte\\nmisalignment for the network header and an unaligned access exception\\non some architectures.\\n\\nThe exception can be reproduced by sending a PPPoE PFC frame to an\\nethernet interface of a MIPS board, with RPS enabled, even if no PPPoE\\nsession is active on that interface:\\n\\n$ 0 : 00000000 80c40000 00000000 85144817\\n$ 4 : 00000008 00000100 80a75758 81dc9bb8\\n$ 8 : 00000010 8087ae2c 0000003d 00000000\\n$12 : 000000e0 00000039 00000000 00000000\\n$16 : 85043240 80a75758 81dc9bb8 00006488\\n$20 : 0000002f 00000007 85144810 80a70000\\n$24 : 81d1bda0 00000000\\n$28 : 81dc8000 81dc9aa8 00000000 805ead08\\nHi : 00009d51\\nLo : 2163358a\\nepc : 805e91f0 __skb_flow_dissect+0x1b0\/0x1b50\\nra : 805ead08 __skb_get_hash_net+0x74\/0x12c\\nStatus: 11000403 KERNEL EXL IE\\nCause : 40800010 (ExcCode 04)\\nBadVA : 85144817\\nPrId : 0001992f (MIPS 1004Kc)\\nCall Trace:\\n[\\u003c805e91f0\\u003e] __skb_flow_dissect+0x1b0\/0x1b50\\n[\\u003c805ead08\\u003e] __skb_get_hash_net+0x74\/0x12c\\n[\\u003c805ef330\\u003e] get_rps_cpu+0x1b8\/0x3fc\\n[\\u003c805fca70\\u003e] netif_receive_skb_list_internal+0x324\/0x364\\n[\\u003c805fd120\\u003e] napi_complete_done+0x68\/0x2a4\\n[\\u003c8058de5c\\u003e] mtk_napi_rx+0x228\/0xfec\\n[\\u003c805fd398\\u003e] __napi_poll+0x3c\/0x1c4\\n[\\u003c805fd754\\u003e] napi_threaded_poll_loop+0x234\/0x29c\\n[\\u003c805fd848\\u003e] napi_threaded_poll+0x8c\/0xb0\\n[\\u003c80053544\\u003e] kthread+0x104\/0x12c\\n[\\u003c80002bd8\\u003e] ret_from_kernel_thread+0x14\/0x1c\\n\\nCode: 02d51821 1060045b 00000000 \\u003c8c640000\\u003e 3084000f 2c820005 144001a2 00042080 8e220000\\n\\nTo reduce the attack surface and maintain performance, do not process\\nPPPoE PFC frames.\\n\\n[1] https:\/\/lore.kernel.org\/r\/20220630231016.GA392@debian.home”,”published”:”2026-06-08T15:46:33.936Z”,”modified”:”2026-06-14T04:30:06.625Z”,”type”:”cve”,”title”:”flow_dissector: do not dissect PPPoE PFC frames”,”source”:”Linux”,”references”:”https:\/\/git.kernel.org\/stable\/c\/e7c811ca372d53c2be7d01a1614e71fae1054836\\nhttps:\/\/git.kernel.org\/stable\/c\/abc5bc84e0f2edc7ea2d437afa6ef3fe1fc43200\\nhttps:\/\/git.kernel.org\/stable\/c\/18ae9eacfc95cc715c0606b2c86e8aa8a86cf3e3\\nhttps:\/\/git.kernel.org\/stable\/c\/db104b0d8a7856397c0469d83a4289adf7c54863\\nhttps:\/\/git.kernel.org\/stable\/c\/6044392d9cace3a3672b02c8bc7d38b502e51734\\nhttps:\/\/git.kernel.org\/stable\/c\/0d00b9015069712944934bab09eaa6c542143049\\nhttps:\/\/git.kernel.org\/stable\/c\/7c93f353eab4ea911e394630f07d72e040a729d8\\nhttps:\/\/git.kernel.org\/stable\/c\/d6c19b31a3c1d519fabdcf0aa239e6b6109b9473″,”id”:”CVE-2026-46306″,”bulletinFamily”:””,”cwe”:null,”cvelist”:null,”sourceData”:”Linux Linux 10f665b52a75df6eb26ddebbbc072ee264183731\\nLinux Linux d7e541e86122d21f71eb71c5dfa7fb1eb6623fe8\\nLinux Linux 46126db9c86110e5fc1e369b9bb89735ddefdae4\\nLinux Linux 46126db9c86110e5fc1e369b9bb89735ddefdae4\\nLinux Linux 46126db9c86110e5fc1e369b9bb89735ddefdae4\\nLinux Linux 46126db9c86110e5fc1e369b9bb89735ddefdae4\\nLinux Linux 46126db9c86110e5fc1e369b9bb89735ddefdae4\\nLinux Linux 46126db9c86110e5fc1e369b9bb89735ddefdae4\\nLinux Linux 6.0″,”sourceHref”:””,”cvss”:{“score”:7.5,”severity”:”HIGH”,”vector”:”CVSS:3.1\/AV:N\/AC:L\/PR:N\/UI:N\/S:U\/C:N\/I:N\/A:H”,”version”:”3.1″},”cvss2″:{},”cvss3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””,”cvssV3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””}},”href”:””,”category_name”:”CVE”,”post_link”:””,”product”:”Linux”,”version”:”10f665b52a75df6eb26ddebbbc072ee264183731″,”vendor”:”Linux”,”ai_description”:””,”ai_severity”:””,”ai_vendor”:””,”ai_product”:””,”ai_version”:””,”ai_score”:0}<\/p>\n","protected":false},"excerpt":{"rendered":"
{“lastseen”:””,”description”:”In the Linux kernel, the following vulnerability has been resolved:\\n\\nflow_dissector: do not dissect PPPoE PFC frames\\n\\nRFC 2516 Section 7 states that Protocol Field Compression (PFC)…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[6,8,16,12,15,13,7,11,5],"class_list":["post-62563","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-75","tag-exploit","tag-high","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"\n