{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-63890",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-63890"
  ],
  "published": "2026-07-19T14:56:29Z",
  "summary": "scsi: fcoe: Reject FIP descriptors with zero fip_dlen in CVL walker",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: fcoe: Reject FIP descriptors with zero fip_dlen in CVL walker\n\ndrivers/scsi/fcoe/fcoe_ctlr.c::fcoe_ctlr_recv_clr_vlink() advanced the\ndescriptor cursor by an attacker-supplied fip_dlen without ever\nrequiring dlen >= sizeof(struct fip_desc) in the default branch.  The\nnamed descriptor cases (FIP_DT_MAC, FIP_DT_NAME, FIP_DT_VN_ID) checked\ntheir per-type minimum lengths, but a FIP_DT_NON_CRITICAL descriptor\n(fip_dtype >= 128, which the standard requires receivers to silently\nignore) skipped that check entirely.\n\nAn unauthenticated L2 peer on the FCoE control VLAN could hang\nfcoe_ctlr_recv_work on an fcoe, qedf, or bnx2fc initiator indefinitely\nby emitting one FIP CVL frame whose single descriptor had fip_dtype ==\nFIP_DT_NON_CRITICAL and fip_dlen == 0: the cursor advanced zero bytes\nper iteration and the loop condition rlen >= sizeof(*desc) stayed true\nforever, blocking every subsequent FIP frame on that controller.\n\nTighten the outer dlen guard to also reject dlen < sizeof(struct\nfip_desc), so a malformed descriptor whose length cannot even cover the\ndescriptor header is rejected before the switch.  This is the same\nlower-bound the named cases already apply and is the minimum scope that\ncloses the loop.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.176",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-63890"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d179949d2175d2857d1c3a275a22bea58bcc5d36"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fda976f7390bb5d1e9b84ef11ebb17323038e0c6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/80a0cd307205236ca28aa49bc553f58edcb9bf3a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0e3c6e5a8fc15a74dfb1e0c1df9f1da73600a81a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/549859a1131052b07dff11a448e9f3221a40f260"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/14dd80a20a72ce334adcc2d67402360527065948"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d537d29d51c8b808469e5adacf3e5a0092700738"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9eed1bd59937e6828b00d2f2dfef631d964f3636"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-07-19T14:56:29Z"
  }
}