dm-pcache: reject option groups without values

{
  "id": "7102abb45aa8070c910e65f063241936a866383317f5ceedd66974fadbc6cf3f",
  "url": "https://osv.dev/vulnerability/CVE-2026-72104",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "dm-pcache: reject option groups without values",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: dm-pcache: reject option groups without values The pcache target parses optional arguments as name/value pairs. A table that advertises one optional argument and supplies only a recognized option name, for example \"cache_mode\", reaches parse_cache_opts() with argc == 1. The parser consumes the name, decrements argc to zero, then calls dm_shift_arg() again for the value. dm_shift_arg() returns NULL when no arguments remain, and the following strcmp() dereferences that NULL pointer. Check that each recognized option has a value before consuming it. This keeps valid \"cache_mode writeback\" and \"data_crc true/false\" tables unchanged while making malformed tables fail during target construction with a precise missing-value error.",
    "evidence": "osv:CVE-2026-72104",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.40",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-72104",
      "aliases": [
        "CVE-2026-72104"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1d57628ff95b32d5cfa8d8f50e07690c161e9cf0"
                },
                {
                  "fixed": "1247615aadb74c89c1b2f01a6de7df9dab92ecb3"
                },
                {
                  "fixed": "0cbe13fe540330d31e5273bbf8cbd66bc7c9cb5a"
                },
                {
                  "fixed": "d9c631e3fbd44246a2be781d26cfacbb9b8ec127"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72104.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.18.0"
                },
                {
                  "fixed": "6.18.40"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72104.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:40.083789078Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0cbe13fe540330d31e5273bbf8cbd66bc7c9cb5a",
        "https://git.kernel.org/stable/c/1247615aadb74c89c1b2f01a6de7df9dab92ecb3",
        "https://git.kernel.org/stable/c/d9c631e3fbd44246a2be781d26cfacbb9b8ec127",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72104.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-72104",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72104.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-72104",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 507749,
  "published_at": "2026-08-15T05:52:47.458+00:00"
}