{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "8cf868affdc459beee1a941df0cfaba1673740e3"
            },
            {
              "fixed": "5787052e5f69beb649f3d6a80a8aa37d9e683e4e"
            },
            {
              "fixed": "4f1756d043e56ea2e9a6c858fb290a0cf6fc2251"
            },
            {
              "fixed": "36ff362235307af95152d510b53c2d9b8773a342"
            },
            {
              "fixed": "247ed8a969f981bfba3112fd4bb441eaa6cef59c"
            },
            {
              "fixed": "7bcadb3c2bc1cf60690e931aadd35fb7bd646a49"
            },
            {
              "fixed": "2c5b8eeea006eb694c81631cd5713d494b80be90"
            },
            {
              "fixed": "342829e042ac00f3d68d442ea92873fb6683f494"
            },
            {
              "fixed": "fad217e16fded7f3c09f8637b0f6a224d58b5f2e"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.10.0"
            },
            {
              "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": "6.6.140"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.88"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.30"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46196.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracepoint: balance regfunc() on func_add() failure in tracepoint_add_func()\n\nWhen a tracepoint goes through the 0 -\u003e 1 transition, tracepoint_add_func()\ninvokes the subsystem's ext-\u003eregfunc() before attempting to install the\nnew probe via func_add(). If func_add() then fails (for example, when\nallocate_probes() cannot allocate a new probe array under memory pressure\nand returns -ENOMEM), the function returns the error without calling the\nmatching ext-\u003eunregfunc(), leaving the side effects of regfunc() behind\nwith no installed probe to justify them.\n\nFor syscall tracepoints this is particularly unpleasant: syscall_regfunc()\nbumps sys_tracepoint_refcount and sets SYSCALL_TRACEPOINT on every task.\nAfter a leaked failure, the refcount is stuck at a non-zero value with no\nconsumer, and every task continues paying the syscall trace entry/exit\noverhead until reboot. Other subsystems providing regfunc()/unregfunc()\npairs exhibit similarly scoped persistent state.\n\nMirror the existing 1 -\u003e 0 cleanup and call ext-\u003eunregfunc() in the\nfunc_add() error path, gated on the same condition used there so the\nunwind is symmetric with the registration.",
  "id": "CVE-2026-46196",
  "modified": "2026-07-15T01:49:17.134532970Z",
  "published": "2026-05-28T09:36:49.293Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/247ed8a969f981bfba3112fd4bb441eaa6cef59c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2c5b8eeea006eb694c81631cd5713d494b80be90"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/342829e042ac00f3d68d442ea92873fb6683f494"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/36ff362235307af95152d510b53c2d9b8773a342"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f1756d043e56ea2e9a6c858fb290a0cf6fc2251"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5787052e5f69beb649f3d6a80a8aa37d9e683e4e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7bcadb3c2bc1cf60690e931aadd35fb7bd646a49"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fad217e16fded7f3c09f8637b0f6a224d58b5f2e"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46196.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46196"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "tracepoint: balance regfunc() on func_add() failure in tracepoint_add_func()"
}