CVE-2026-64092 (GCVE-0-2026-64092)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-07-19 15:40
VLAI
Title
batman-adv: tp_meter: fix tp_vars reference leak in receiver shutdown
Summary
In the Linux kernel, the following vulnerability has been resolved: batman-adv: tp_meter: fix tp_vars reference leak in receiver shutdown The receiver shutdown timer handler, batadv_tp_receiver_shutdown(), is responsible for releasing the tp_vars reference it holds. However, the existing logic for coordinating this release with batadv_tp_stop_all() was flawed. timer_shutdown_sync() guarantees the timer will not fire again after it returns, but it returns non-zero only when the timer was pending at the time of the call. If the timer had already expired (and batadv_tp_stop_all() would unsucessfully try to rearm itself), batadv_tp_stop_all() skips its batadv_tp_vars_put(), and batadv_tp_receiver_shutdown() fails to put its own reference as well. Fix this by introducing a new atomic variable receiving that is set to 1 when the receiver is initialized and cleared atomically with atomic_xchg() by whichever side claims it first. Only the side that observes the transition from 1 to 0 is responsible for releasing the tp_vars timer reference, eliminating the uncertainty.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 268078acae72daa12b17b2b299701cb9924e469a , < 7715c73f33260af724d734c41b794457e9be8dbc (git)
Affected: 58943b7ea356294749dae3e75b96c0ee292c00be , < 297e1bc4a915b7cd3e65a79ed906b23fb3d7aaae (git)
Affected: 79bc0eaeef2c5797317bf2da8e3159a74d62ec47 , < 0b1bedf114ea93fef929b31f0d70a9eedcc601de (git)
Affected: 26dfeee8db81354bfdade155f27f9e16510ad196 , < a9f0bfd624ee8a286d6fd2bf0f796e730efb49b0 (git)
Affected: 03660dab86f93319178a24667f6998526dc4355d , < b285bc0a97f43823a4967fb6d286de4c7f53d541 (git)
Affected: 8634c1dbd73adb74d40533ebb7e914efb82e71fb , < d078501dde9b57210f1808cdef4b59463d1f5fc8 (git)
Affected: 3d3cf6a7314aca4df0a6dde28ce784a2a30d0166 , < 77098e4bea37af51d3962efa88a5af2ea5e1ac57 (git)
Affected: 5e7d0ac936354c36810e74ac3056b334ed1f4058 (git)
Affected: 5.10.259 , < 5.11 (semver)
Create a notification for this product.
Linux Linux Affected: 6.6.140 , < 6.6.142 (semver)
Affected: 6.12.90 , < 6.12.92 (semver)
Affected: 6.18.32 , < 6.18.34 (semver)
Affected: 7.0.9 , < 7.0.11 (semver)
Create a notification for this product.
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{
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          "programFiles": [
            "net/batman-adv/tp_meter.c",
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      "cpeApplicability": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: tp_meter: fix tp_vars reference leak in receiver shutdown\n\nThe receiver shutdown timer handler, batadv_tp_receiver_shutdown(), is\nresponsible for releasing the tp_vars reference it holds. However, the\nexisting logic for coordinating this release with batadv_tp_stop_all() was\nflawed.\n\ntimer_shutdown_sync() guarantees the timer will not fire again after it\nreturns, but it returns non-zero only when the timer was pending at the\ntime of the call. If the timer had already expired (and\nbatadv_tp_stop_all() would unsucessfully try to  rearm itself),\nbatadv_tp_stop_all() skips its batadv_tp_vars_put(), and\nbatadv_tp_receiver_shutdown() fails to put its own reference as well.\n\nFix this by introducing a new atomic variable receiving that is set to 1\nwhen the receiver is initialized and cleared atomically with atomic_xchg()\nby whichever side claims it first. Only the side that observes the\ntransition from 1 to 0 is responsible for releasing the tp_vars timer\nreference, eliminating the uncertainty."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T15:40:00.603Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/7715c73f33260af724d734c41b794457e9be8dbc"
        },
        {
          "url": "https://git.kernel.org/stable/c/297e1bc4a915b7cd3e65a79ed906b23fb3d7aaae"
        },
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        {
          "url": "https://git.kernel.org/stable/c/77098e4bea37af51d3962efa88a5af2ea5e1ac57"
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    "cveId": "CVE-2026-64092",
    "datePublished": "2026-07-19T15:40:00.603Z",
    "dateReserved": "2026-07-19T07:54:57.032Z",
    "dateUpdated": "2026-07-19T15:40:00.603Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-07-21",
      "epss": "0.0018",
      "percentile": "0.07804"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64092\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-19T16:17:50.110\",\"lastModified\":\"2026-07-19T16:17:50.110\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbatman-adv: tp_meter: fix tp_vars reference leak in receiver shutdown\\n\\nThe receiver shutdown timer handler, batadv_tp_receiver_shutdown(), is\\nresponsible for releasing the tp_vars reference it holds. However, the\\nexisting logic for coordinating this release with batadv_tp_stop_all() was\\nflawed.\\n\\ntimer_shutdown_sync() guarantees the timer will not fire again after it\\nreturns, but it returns non-zero only when the timer was pending at the\\ntime of the call. If the timer had already expired (and\\nbatadv_tp_stop_all() would unsucessfully try to  rearm itself),\\nbatadv_tp_stop_all() skips its batadv_tp_vars_put(), and\\nbatadv_tp_receiver_shutdown() fails to put its own reference as well.\\n\\nFix this by introducing a new atomic variable receiving that is set to 1\\nwhen the receiver is initialized and cleared atomically with atomic_xchg()\\nby whichever side claims it first. Only the side that observes the\\ntransition from 1 to 0 is responsible for releasing the tp_vars timer\\nreference, eliminating the uncertainty.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/batman-adv/tp_meter.c\",\"net/batman-adv/types.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"268078acae72daa12b17b2b299701cb9924e469a\",\"lessThan\":\"7715c73f33260af724d734c41b794457e9be8dbc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"58943b7ea356294749dae3e75b96c0ee292c00be\",\"lessThan\":\"297e1bc4a915b7cd3e65a79ed906b23fb3d7aaae\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"79bc0eaeef2c5797317bf2da8e3159a74d62ec47\",\"lessThan\":\"0b1bedf114ea93fef929b31f0d70a9eedcc601de\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"26dfeee8db81354bfdade155f27f9e16510ad196\",\"lessThan\":\"a9f0bfd624ee8a286d6fd2bf0f796e730efb49b0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"03660dab86f93319178a24667f6998526dc4355d\",\"lessThan\":\"b285bc0a97f43823a4967fb6d286de4c7f53d541\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8634c1dbd73adb74d40533ebb7e914efb82e71fb\",\"lessThan\":\"d078501dde9b57210f1808cdef4b59463d1f5fc8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3d3cf6a7314aca4df0a6dde28ce784a2a30d0166\",\"lessThan\":\"77098e4bea37af51d3962efa88a5af2ea5e1ac57\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5e7d0ac936354c36810e74ac3056b334ed1f4058\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.10.259\",\"lessThan\":\"5.11\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/batman-adv/tp_meter.c\",\"net/batman-adv/types.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.6.140\",\"lessThan\":\"6.6.142\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.12.90\",\"lessThan\":\"6.12.92\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.18.32\",\"lessThan\":\"6.18.34\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"7.0.9\",\"lessThan\":\"7.0.11\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0b1bedf114ea93fef929b31f0d70a9eedcc601de\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/297e1bc4a915b7cd3e65a79ed906b23fb3d7aaae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/77098e4bea37af51d3962efa88a5af2ea5e1ac57\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7715c73f33260af724d734c41b794457e9be8dbc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a9f0bfd624ee8a286d6fd2bf0f796e730efb49b0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b285bc0a97f43823a4967fb6d286de4c7f53d541\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d078501dde9b57210f1808cdef4b59463d1f5fc8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-07-21T08:01:56+00:00",
      "cve": "CVE-2026-64092",
      "id": "CVE-2026-64092",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: batman-adv: tp_meter: fix tp_vars reference leak in receiver shutdown",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64092.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.