{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "a899d324863a3d15ce0eea513884e1b73a758c58"
            },
            {
              "fixed": "3d1561537237c6cc1db76155183d8bbdac2339f0"
            },
            {
              "fixed": "dc4d5c57e012c2c669793deb1515a57bbc6bf5dd"
            },
            {
              "fixed": "d54a221b0f3cd9e1f03f18104be34e02a8258fae"
            },
            {
              "fixed": "aad4337a21b9ad3ae8d668fa8678d05e26ecbaa8"
            },
            {
              "fixed": "9f0d45d509b434c54da10e01f4ef8086e4583401"
            },
            {
              "fixed": "9708eb50fd7343145b422be852f890212155d845"
            },
            {
              "fixed": "55f2ea9ff83cc27a85526b14bc9b32f96a08d6ec"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "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": "6.12.94"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.36"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53331.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nslimbus: qcom-ngd-ctrl: Avoid ABBA on tx_lock/ctrl-\u003elock\n\nDuring the SSR/PDR down notification the tx_lock is taken with the\nintent to provide synchronization with active DMA transfers.\n\nBut during this period qcom_slim_ngd_down() is invoked, which ends up in\nslim_report_absent(), which takes the slim_controller lock. In multiple\nother codepaths these two locks are taken in the opposite order (i.e.\nslim_controller then tx_lock).\n\nThe result is a lockdep splat, and a possible deadlock:\n\n  rprocctl/449 is trying to acquire lock:\n  ffff00009793e620 (\u0026ctrl-\u003elock){+.+.}-{4:4}, at: slim_report_absent (drivers/slimbus/core.c:322) slimbus\n\n  but task is already holding lock:\n  ffff00009793fb50 (\u0026ctrl-\u003etx_lock){+.+.}-{4:4}, at: qcom_slim_ngd_ssr_pdr_notify (drivers/slimbus/qcom-ngd-ctrl.c:1475) slim_qcom_ngd_ctrl\n\n  which lock already depends on the new lock.\n\n  Possible unsafe locking scenario:\n\n        CPU0                    CPU1\n        ----                    ----\n   lock(\u0026ctrl-\u003etx_lock);\n                                lock(\u0026ctrl-\u003elock);\n                                lock(\u0026ctrl-\u003etx_lock);\n   lock(\u0026ctrl-\u003elock);\n\nThe assumption is that the comment refers to the desire to not call\nqcom_slim_ngd_exit_dma() while we have an ongoing DMA TX transaction.\nBut any such transaction is initiated and completed within a single\nqcom_slim_ngd_xfer_msg().\n\nPrior to calling qcom_slim_ngd_exit_dma() the slim_controller is torn\ndown, all child devices are notified that the slimbus is gone and the\nchild devices are removed.\n\nStop taking the tx_lock in qcom_slim_ngd_ssr_pdr_notify() to avoid the\ndeadlock.",
  "id": "CVE-2026-53331",
  "modified": "2026-07-08T05:38:34.731312271Z",
  "published": "2026-07-01T13:32:15.733Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3d1561537237c6cc1db76155183d8bbdac2339f0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55f2ea9ff83cc27a85526b14bc9b32f96a08d6ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9708eb50fd7343145b422be852f890212155d845"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9f0d45d509b434c54da10e01f4ef8086e4583401"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aad4337a21b9ad3ae8d668fa8678d05e26ecbaa8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d54a221b0f3cd9e1f03f18104be34e02a8258fae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc4d5c57e012c2c669793deb1515a57bbc6bf5dd"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53331.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53331"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "slimbus: qcom-ngd-ctrl: Avoid ABBA on tx_lock/ctrl-\u003elock"
}