CVE-2026-64092 — batman-adv: tp_meter: fix tp_vars reference leak in receiver shutdown
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.
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
How the score was calculated
- Technical severity (medium)+3
The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.
Remediation
Fixes and mitigations documented by the sources — linked to the original advisory.
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
First 24 hours
Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.
- Identify exposed assets running the affected vendor/product/version combinations (Linux Linux, Linux Linux Kernel).
- Apply the fixed version or the patch documented under Remediation.
- Search available logs for exploit probes, errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Linux | Linux |
≥ 26dfeee8db81354bfdade155f27f9e16510ad196 and < a9f0bfd624ee8a286d6fd2bf0f796e730efb49b0≥ 7.0.9 and < 7.0.11≥ 6.18.32 and < 6.18.34≥ 6.12.90 and < 6.12.92≥ 6.6.140 and < 6.6.142≥ 5.10.259 and < 5.11version 5e7d0ac936354c36810e74ac3056b334ed1f4058≥ 3d3cf6a7314aca4df0a6dde28ce784a2a30d0166 and < 77098e4bea37af51d3962efa88a5af2ea5e1ac57 and 5 more≥ 8634c1dbd73adb74d40533ebb7e914efb82e71fb and < d078501dde9b57210f1808cdef4b59463d1f5fc8≥ 03660dab86f93319178a24667f6998526dc4355d and < b285bc0a97f43823a4967fb6d286de4c7f53d541≥ 79bc0eaeef2c5797317bf2da8e3159a74d62ec47 and < 0b1bedf114ea93fef929b31f0d70a9eedcc601de≥ 58943b7ea356294749dae3e75b96c0ee292c00be and < 297e1bc4a915b7cd3e65a79ed906b23fb3d7aaae≥ 268078acae72daa12b17b2b299701cb9924e469a and < 7715c73f33260af724d734c41b794457e9be8dbc |
Vulnerable | CVE Program (cve.org) e CISA ADP |
| Linux | Linux Kernel | ≥ 5.10.259 and < 5.11version 7.1-rc4≥ 7.0.9 and < 7.0.11≥ 6.18.32 and < 6.18.34≥ 6.12.90 and < 6.12.92≥ 6.6.140 and < 6.6.142 | Vulnerable | NIST National Vulnerability Database |
Attack characteristics
The CVSS vector, decoded. It describes the attack, not your exposure to it.
Every base score collected
Sources score independently and may disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Scored by |
|---|---|---|---|---|---|
| 5.5 | CVSS 3.1 | Medium | 1.8 | 3.6 | nvd@nist.gov via NIST National Vulnerability Database |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (score shown at the top: nvd@nist.gov) Detection
Read off the CVSS vector and the weakness class. Starting points, not tested rules.
- Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
Timeline
What happened to this CVE, newest first.
- 2026
- Affected products added · linux/linux
- Record published
- Fix documented
- CVSS changed · 5.5
- Source status changed · → Analyzed
- Record created in this database
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 1× Official description updated · Oct 15, 2026 – Oct 15, 2026
References
7 on the record
- git.kernel.org/stable/c/77098e4bea37af51d3962efa88a5af2ea5e1ac57
- git.kernel.org/stable/c/7715c73f33260af724d734c41b794457e9be8dbc
- git.kernel.org/stable/c/a9f0bfd624ee8a286d6fd2bf0f796e730efb49b0
- git.kernel.org/stable/c/b285bc0a97f43823a4967fb6d286de4c7f53d541
- git.kernel.org/stable/c/297e1bc4a915b7cd3e65a79ed906b23fb3d7aaae
- git.kernel.org/stable/c/0b1bedf114ea93fef929b31f0d70a9eedcc601de
- git.kernel.org/stable/c/d078501dde9b57210f1808cdef4b59463d1f5fc8
Elsewhere on this site
Related CVEs (same products)
- Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 9h
- Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 9h
- Unknown CVE-2026-98431 RDMA/uverbs: Fix mmap_lock/disassociation_lock circular dependency 1d
- Unknown CVE-2026-98430 RDMA/efa: Keep admin queues alive while IRQ is registered 1d
- Unknown CVE-2026-98429 RDMA/efa: Keep EQ resources alive while IRQ is registered 1d
- Unknown CVE-2026-98428 ALSA: usb: 6fire: Avoid embedded URBs 1d
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No FIRST EPSS score.
- No CISA SSVC assessment.
- No CWE classification.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.
Answered from this record
Text assembled only from the fields above — no additional claims.
What should defenders know first?
CVE-2026-64092 is "batman-adv: tp_meter: fix tp_vars reference leak in receiver shutdown", rated Medium. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.5 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.
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