{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e"
            },
            {
              "fixed": "00bf4bb9947b1190a8be8d9b6a1bcbfa3707785c"
            },
            {
              "fixed": "74a76634055462833446684fd526d73c290ea43a"
            },
            {
              "fixed": "5bc2d50fb66b46f86543d5153a188eb1486d0b6e"
            },
            {
              "fixed": "f86b20ec8d17d77bddc02c5c86cfa2389d84ecff"
            },
            {
              "fixed": "770bf0a35f0620b526fd4193889d1e77084e4c43"
            },
            {
              "fixed": "933880a8bc9b4042223a79255c0b1021cdc36991"
            },
            {
              "fixed": "d5487249a81ea658717614009c8f46acc5b7101a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.8.0"
            },
            {
              "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": "6.12.93"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.34"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64093.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: tp_meter: directly shut down timer on cleanup\n\nbatadv_tp_sender_cleanup() was calling timer_delete_sync() followed by\ntimer_delete() to guard against the timer handler re-arming itself between\nthe two calls. This double-deletion hack relied on the sending status being\nset to 0 to suppress re-arming.\n\nReplace both calls with a single timer_shutdown_sync(). This function both\nwaits for any running timer callback to complete (like timer_delete_sync())\nand permanently disarms the timer so it cannot be re-armed afterwards,\nmaking re-arming prevention unconditional and self-documenting.\n\nThe re-arming property is also required because otherwise:\n\n1. context 0 (batadv_tp_recv_ack()) checks in\n   batadv_tp_reset_sender_timer() if sending is still 1 -\u003e it is\n2. context 1 changes in batadv_tp_sender_shutdown() sending to 0 and in\n   this process forces the kthread to stop timer in\n   batadv_tp_sender_cleanup()\n3. context 0 continues in batadv_tp_reset_sender_timer() and rearms the\n   timer -\u003e but the reference for it is already gone",
  "id": "CVE-2026-64093",
  "modified": "2026-08-13T03:51:48.485222627Z",
  "published": "2026-07-19T15:40:01.172Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/00bf4bb9947b1190a8be8d9b6a1bcbfa3707785c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5bc2d50fb66b46f86543d5153a188eb1486d0b6e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/74a76634055462833446684fd526d73c290ea43a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/770bf0a35f0620b526fd4193889d1e77084e4c43"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/933880a8bc9b4042223a79255c0b1021cdc36991"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d5487249a81ea658717614009c8f46acc5b7101a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f86b20ec8d17d77bddc02c5c86cfa2389d84ecff"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64093.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64093"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "batman-adv: tp_meter: directly shut down timer on cleanup"
}