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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
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)
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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)
guessed Create a notification for this product.
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      "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",
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    "suse_vex": {
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      "cve": "CVE-2026-64092",
      "id": "CVE-2026-64092",
      "initial_release_date": "2026-07-21T12:59:50Z",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64092",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64092.json",
      "version": "4"
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}



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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.