{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "a081c13e39b5c17052a7b46fafa61019c4c110ff"
            },
            {
              "fixed": "79991b770fc3685b1d5cf805b659a879edd19931"
            },
            {
              "fixed": "8db1232945bc663fb94f300090a1fc108de99296"
            },
            {
              "fixed": "94e5bdd08e51c450d954bc592f591c233ca5c9df"
            },
            {
              "fixed": "de96dc11aee0d058927bff94a168e3c5c46483e2"
            },
            {
              "fixed": "e3b25bf2cf2496e85bc05b33360faf9fdf880e03"
            },
            {
              "fixed": "ee56b5e18f566c0b5a183379dcd63d402cebf2f8"
            },
            {
              "fixed": "24ffc919467d20951f0f132d1c75294e2e91e09b"
            },
            {
              "fixed": "bce07e2f37b5e4a427d36fd6b1c14067b27591db"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.29"
            },
            {
              "fixed": "5.10.271"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.222"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.189"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.158"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.55"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98479.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: libiscsi_tcp: Check the data direction of a Data-In PDU\n\nThe Data-In branch of iscsi_tcp_hdr_dissect() resolves the ITT to a task\nand copies the PDU's data segment into that command's scatterlist without\nasking whether the command was reading. iscsi_tcp_r2t_rsp() in the same\nfile does ask, and rejects an R2T for a command that is not DMA_TO_DEVICE.\n\nA target that answers a WRITE command's ITT with a Data-In therefore has\nthe initiator write target-supplied bytes into the pages that write was\nabout to send. Those are the caller's own pinned pages for an O_DIRECT\nwrite, and page cache pages for a buffered one.\n\nObserved against a test target that emits one 512-byte Data-In naming a 128\nKB write's ITT, after the R2T for that write. With O_DIRECT the caller's\nbuffer ends up holding 512 bytes of the target's data while pwrite()\nreturns 131072. Buffered is quieter: pwrite() and fsync() both succeed,\nnothing is logged, and reading those blocks back returns the target's bytes\nout of the page cache without a command going on the wire.\n\nCheck the direction before using the scatterlist, the way the R2T path\nalready does.",
  "id": "CVE-2026-98479",
  "modified": "2026-10-20T02:30:29.419006320Z",
  "published": "2026-10-18T15:15:53.663Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24ffc919467d20951f0f132d1c75294e2e91e09b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/79991b770fc3685b1d5cf805b659a879edd19931"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8db1232945bc663fb94f300090a1fc108de99296"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94e5bdd08e51c450d954bc592f591c233ca5c9df"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bce07e2f37b5e4a427d36fd6b1c14067b27591db"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/de96dc11aee0d058927bff94a168e3c5c46483e2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3b25bf2cf2496e85bc05b33360faf9fdf880e03"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ee56b5e18f566c0b5a183379dcd63d402cebf2f8"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98479.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98479"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "scsi: libiscsi_tcp: Check the data direction of a Data-In PDU"
}