CVE-2026-64093 (GCVE-0-2026-64093)
Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-08-05 12:39
VLAI
EPSS
VEX
Title
batman-adv: tp_meter: directly shut down timer on cleanup
Summary
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: tp_meter: directly shut down timer on cleanup
batadv_tp_sender_cleanup() was calling timer_delete_sync() followed by
timer_delete() to guard against the timer handler re-arming itself between
the two calls. This double-deletion hack relied on the sending status being
set to 0 to suppress re-arming.
Replace both calls with a single timer_shutdown_sync(). This function both
waits for any running timer callback to complete (like timer_delete_sync())
and permanently disarms the timer so it cannot be re-armed afterwards,
making re-arming prevention unconditional and self-documenting.
The re-arming property is also required because otherwise:
1. context 0 (batadv_tp_recv_ack()) checks in
batadv_tp_reset_sender_timer() if sending is still 1 -> it is
2. context 1 changes in batadv_tp_sender_shutdown() sending to 0 and in
this process forces the kthread to stop timer in
batadv_tp_sender_cleanup()
3. context 0 continues in batadv_tp_reset_sender_timer() and rearms the
timer -> but the reference for it is already gone
Severity
8.8 (High)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 00bf4bb9947b1190a8be8d9b6a1bcbfa3707785c
(git)
Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 74a76634055462833446684fd526d73c290ea43a (git) Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 5bc2d50fb66b46f86543d5153a188eb1486d0b6e (git) Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < f86b20ec8d17d77bddc02c5c86cfa2389d84ecff (git) Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 770bf0a35f0620b526fd4193889d1e77084e4c43 (git) Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 933880a8bc9b4042223a79255c0b1021cdc36991 (git) Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < d5487249a81ea658717614009c8f46acc5b7101a (git) |
guessed | |
| Linux | Linux |
Affected:
4.8
Unaffected: 0 , < 4.8 (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.93 , ≤ 6.12.* (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/f86b20ec8d17d77bddc02c5c86cfa2389d84ecff"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-07-21T06:22:55+00:00",
"cve": "CVE-2026-64093",
"id": "CVE-2026-64093",
"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: directly shut down timer on cleanup",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64093.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-15T01:55:52Z",
"cve": "CVE-2026-64093",
"id": "CVE-2026-64093",
"initial_release_date": "2026-07-21T12:59:49Z",
"product_status:known_affected": "368",
"product_status:known_not_affected": "6",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-64093",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64093.json",
"version": "6"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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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.
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