{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8"
            },
            {
              "fixed": "953953abb66e52c224057ab91e404284fefeab62"
            },
            {
              "fixed": "601dd3b79769b38d30b693c40afdb2a4b7edf9d0"
            },
            {
              "fixed": "3969db6b22e3d90d8c5f22ac1a7fe0350a94c136"
            },
            {
              "fixed": "8c59eeeeffa1524ef57e173a89a1a3ff539888d5"
            },
            {
              "fixed": "96c4af418586ee9a6aab61738644366426e05316"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.6.128"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.75"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.16"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43215.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: Fix locking usage for tcon fields\n\nWe used to use the cifs_tcp_ses_lock to protect a lot of objects\nthat are not just the server, ses or tcon lists. We later introduced\nsrv_lock, ses_lock and tc_lock to protect fields within the\ncorresponding structs. This was done to provide a more granular\nprotection and avoid unnecessary serialization.\n\nThere were still a couple of uses of cifs_tcp_ses_lock to provide\ntcon fields. In this patch, I've replaced them with tc_lock.",
  "id": "CVE-2026-43215",
  "modified": "2026-07-15T01:48:58.898049442Z",
  "published": "2026-05-06T11:28:17.425Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3969db6b22e3d90d8c5f22ac1a7fe0350a94c136"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/601dd3b79769b38d30b693c40afdb2a4b7edf9d0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8c59eeeeffa1524ef57e173a89a1a3ff539888d5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/953953abb66e52c224057ab91e404284fefeab62"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96c4af418586ee9a6aab61738644366426e05316"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43215.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43215"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "cifs: Fix locking usage for tcon fields"
}