{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "97c8389d54b9665c38105ea72a428a44b97ff2f6"
            },
            {
              "fixed": "d179949d2175d2857d1c3a275a22bea58bcc5d36"
            },
            {
              "fixed": "fda976f7390bb5d1e9b84ef11ebb17323038e0c6"
            },
            {
              "fixed": "80a0cd307205236ca28aa49bc553f58edcb9bf3a"
            },
            {
              "fixed": "0e3c6e5a8fc15a74dfb1e0c1df9f1da73600a81a"
            },
            {
              "fixed": "549859a1131052b07dff11a448e9f3221a40f260"
            },
            {
              "fixed": "14dd80a20a72ce334adcc2d67402360527065948"
            },
            {
              "fixed": "d537d29d51c8b808469e5adacf3e5a0092700738"
            },
            {
              "fixed": "9eed1bd59937e6828b00d2f2dfef631d964f3636"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.30"
            },
            {
              "fixed": "5.10.259"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.210"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.176"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.143"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.93"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.35"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63890.json"
  },
  "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 \u003e= 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 \u003e= 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 \u003e= sizeof(*desc) stayed true\nforever, blocking every subsequent FIP frame on that controller.\n\nTighten the outer dlen guard to also reject dlen \u003c 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.",
  "id": "CVE-2026-63890",
  "modified": "2026-07-21T03:41:55.821610736Z",
  "published": "2026-07-19T14:55:02.195Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e3c6e5a8fc15a74dfb1e0c1df9f1da73600a81a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/14dd80a20a72ce334adcc2d67402360527065948"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/549859a1131052b07dff11a448e9f3221a40f260"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/80a0cd307205236ca28aa49bc553f58edcb9bf3a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9eed1bd59937e6828b00d2f2dfef631d964f3636"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d179949d2175d2857d1c3a275a22bea58bcc5d36"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d537d29d51c8b808469e5adacf3e5a0092700738"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fda976f7390bb5d1e9b84ef11ebb17323038e0c6"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63890.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63890"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "scsi: fcoe: Reject FIP descriptors with zero fip_dlen in CVL walker"
}