{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-46306",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-46306",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-06-08T15:46:33.936Z",
    "updatedAt": "2026-10-19T19:36:57.372Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "flow_dissector: do not dissect PPPoE PFC frames",
      "summary": "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[<805e91f0>] __skb_flow_dissect+0x1b0/0x1b50\n[<805ead08>] __skb_get_hash_net+0x74/0x12c\n[<805ef330>] get_rps_cpu+0x1b8/0x3fc\n[<805fca70>] netif_receive_skb_list_internal+0x324/0x364\n[<805fd120>] napi_complete_done+0x68/0x2a4\n[<8058de5c>] mtk_napi_rx+0x228/0xfec\n[<805fd398>] __napi_poll+0x3c/0x1c4\n[<805fd754>] napi_threaded_poll_loop+0x234/0x29c\n[<805fd848>] napi_threaded_poll+0x8c/0xb0\n[<80053544>] kthread+0x104/0x12c\n[<80002bd8>] ret_from_kernel_thread+0x14/0x1c\n\nCode: 02d51821  1060045b  00000000 <8c640000> 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",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "10f665b52a75df6eb26ddebbbc072ee264183731",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e7c811ca372d53c2be7d01a1614e71fae1054836"
            },
            {
              "version": "d7e541e86122d21f71eb71c5dfa7fb1eb6623fe8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "abc5bc84e0f2edc7ea2d437afa6ef3fe1fc43200"
            },
            {
              "version": "46126db9c86110e5fc1e369b9bb89735ddefdae4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "18ae9eacfc95cc715c0606b2c86e8aa8a86cf3e3"
            },
            {
              "version": "46126db9c86110e5fc1e369b9bb89735ddefdae4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "db104b0d8a7856397c0469d83a4289adf7c54863"
            },
            {
              "version": "46126db9c86110e5fc1e369b9bb89735ddefdae4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6044392d9cace3a3672b02c8bc7d38b502e51734"
            },
            {
              "version": "46126db9c86110e5fc1e369b9bb89735ddefdae4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0d00b9015069712944934bab09eaa6c542143049"
            },
            {
              "version": "46126db9c86110e5fc1e369b9bb89735ddefdae4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7c93f353eab4ea911e394630f07d72e040a729d8"
            },
            {
              "version": "46126db9c86110e5fc1e369b9bb89735ddefdae4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d6c19b31a3c1d519fabdcf0aa239e6b6109b9473"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.0",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.0"
            },
            {
              "version": "6.1.175",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.140",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.88",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.30",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.7",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}