CVE-2026-68286 (GCVE-0-2026-68286)
Vulnerability from cvelistv5 – Published: 2026-08-10 12:02 – Updated: 2026-10-03 10:55
VLAI
EPSS
VEX
Title
drop_monitor: perform u64_stats updates under IRQ-disabled section
Summary
In the Linux kernel, the following vulnerability has been resolved:
drop_monitor: perform u64_stats updates under IRQ-disabled section
In net_dm_packet_trace_kfree_skb_hit() and net_dm_hw_trap_packet_probe(),
u64_stats_update_begin() / u64_stats_inc() / u64_stats_update_end() were
called after spin_unlock_irqrestore(&...drop_queue.lock, flags), when local
IRQs had already been re-enabled.
Tracepoint probes can execute in IRQ or softirq context. On 32-bit
architectures, u64_stats_update_begin() disables preemption but not interrupts,
relying on seqcount writes. If a nested interrupt occurs on the same CPU during
the 64-bit stats update, the reentrant seqcount update can corrupt the
seqcount state or stats value.
Fix this by performing the 64-bit per-CPU stats update before releasing
drop_queue.lock via spin_unlock_irqrestore(), ensuring local interrupts remain
disabled during the u64_stats update.
Severity
No CVSS data available.
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
e9feb58020f952f7d9de785ede9a7d54ab1eda5c , < dd8472526a04f2185afd792b8041a912a7d75d85
(git)
Affected: e9feb58020f952f7d9de785ede9a7d54ab1eda5c , < 3454c729ee8aa682ec871f1b174b047f731933ae (git) Affected: e9feb58020f952f7d9de785ede9a7d54ab1eda5c , < be9b121894d6ad44f0011f79543a2e3245979497 (git) Affected: e9feb58020f952f7d9de785ede9a7d54ab1eda5c , < 7d857cf5f0120bb0e020fa20b03bd21b9d3e0c04 (git) Affected: e9feb58020f952f7d9de785ede9a7d54ab1eda5c , < d5e2cd2bc8ae36617346b3a54ee9da61d866bf92 (git) Affected: e9feb58020f952f7d9de785ede9a7d54ab1eda5c , < fd098a23bf8fda7eae48db9b06e7c34fc4d228fa (git) |
|
| Linux | Linux |
Affected:
5.4
Unaffected: 0 , < 5.4 (semver) Unaffected: 6.1.189 , ≤ 6.1.* (semver) Unaffected: 6.6.158 , ≤ 6.6.* (semver) Unaffected: 6.12.111 , ≤ 6.12.* (semver) Unaffected: 6.18.53 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
{
"containers": {
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"affected": [
{
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"product": "Linux",
"programFiles": [
"net/core/drop_monitor.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"status": "affected",
"version": "e9feb58020f952f7d9de785ede9a7d54ab1eda5c",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
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"status": "affected",
"version": "e9feb58020f952f7d9de785ede9a7d54ab1eda5c",
"versionType": "git"
},
{
"lessThan": "7d857cf5f0120bb0e020fa20b03bd21b9d3e0c04",
"status": "affected",
"version": "e9feb58020f952f7d9de785ede9a7d54ab1eda5c",
"versionType": "git"
},
{
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"status": "affected",
"version": "e9feb58020f952f7d9de785ede9a7d54ab1eda5c",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/core/drop_monitor.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.4"
},
{
"lessThan": "5.4",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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"versionEndExcluding": "6.1.189",
"versionStartIncluding": "5.4",
"vulnerable": true
},
{
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"versionStartIncluding": "5.4",
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{
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},
{
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},
{
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"versionEndExcluding": "7.2",
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}
],
"negate": false,
"operator": "OR"
}
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrop_monitor: perform u64_stats updates under IRQ-disabled section\n\nIn net_dm_packet_trace_kfree_skb_hit() and net_dm_hw_trap_packet_probe(),\nu64_stats_update_begin() / u64_stats_inc() / u64_stats_update_end() were\ncalled after spin_unlock_irqrestore(\u0026...drop_queue.lock, flags), when local\nIRQs had already been re-enabled.\n\nTracepoint probes can execute in IRQ or softirq context. On 32-bit\narchitectures, u64_stats_update_begin() disables preemption but not interrupts,\nrelying on seqcount writes. If a nested interrupt occurs on the same CPU during\nthe 64-bit stats update, the reentrant seqcount update can corrupt the\nseqcount state or stats value.\n\nFix this by performing the 64-bit per-CPU stats update before releasing\ndrop_queue.lock via spin_unlock_irqrestore(), ensuring local interrupts remain\ndisabled during the u64_stats update."
}
],
"providerMetadata": {
"dateUpdated": "2026-10-03T10:55:41.847Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/dd8472526a04f2185afd792b8041a912a7d75d85"
},
{
"url": "https://git.kernel.org/stable/c/3454c729ee8aa682ec871f1b174b047f731933ae"
},
{
"url": "https://git.kernel.org/stable/c/be9b121894d6ad44f0011f79543a2e3245979497"
},
{
"url": "https://git.kernel.org/stable/c/7d857cf5f0120bb0e020fa20b03bd21b9d3e0c04"
},
{
"url": "https://git.kernel.org/stable/c/d5e2cd2bc8ae36617346b3a54ee9da61d866bf92"
},
{
"url": "https://git.kernel.org/stable/c/fd098a23bf8fda7eae48db9b06e7c34fc4d228fa"
}
],
"title": "drop_monitor: perform u64_stats updates under IRQ-disabled section",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-68286",
"datePublished": "2026-08-10T12:02:19.077Z",
"dateReserved": "2026-07-30T09:28:09.379Z",
"dateUpdated": "2026-10-03T10:55:41.847Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
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"cve": "CVE-2026-68286",
"date": "2026-10-09",
"epss": "0.00211",
"percentile": "0.10498"
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"programFiles": [
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"vendor": "Linux",
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"versionType": "semver"
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{
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
}
]
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],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrop_monitor: perform u64_stats updates under IRQ-disabled section\n\nIn net_dm_packet_trace_kfree_skb_hit() and net_dm_hw_trap_packet_probe(),\nu64_stats_update_begin() / u64_stats_inc() / u64_stats_update_end() were\ncalled after spin_unlock_irqrestore(\u0026...drop_queue.lock, flags), when local\nIRQs had already been re-enabled.\n\nTracepoint probes can execute in IRQ or softirq context. On 32-bit\narchitectures, u64_stats_update_begin() disables preemption but not interrupts,\nrelying on seqcount writes. If a nested interrupt occurs on the same CPU during\nthe 64-bit stats update, the reentrant seqcount update can corrupt the\nseqcount state or stats value.\n\nFix this by performing the 64-bit per-CPU stats update before releasing\ndrop_queue.lock via spin_unlock_irqrestore(), ensuring local interrupts remain\ndisabled during the u64_stats update."
}
],
"id": "CVE-2026-68286",
"lastModified": "2026-10-03T11:17:36.300",
"metrics": {},
"published": "2026-08-10T13:20:17.903",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/3454c729ee8aa682ec871f1b174b047f731933ae"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/d5e2cd2bc8ae36617346b3a54ee9da61d866bf92"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/dd8472526a04f2185afd792b8041a912a7d75d85"
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-31T11:21:03+00:00",
"cve": "CVE-2026-68286",
"id": "CVE-2026-68286",
"initial_release_date": "2026-08-10T00:00:00+00:00",
"product_status:known_affected": "233",
"product_status:known_not_affected": "44",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: drop_monitor: perform u64_stats updates under IRQ-disabled section",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68286.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "low",
"current_release_date": "2026-10-03T00:35:05Z",
"cve": "CVE-2026-68286",
"id": "CVE-2026-68286",
"initial_release_date": "2026-08-22T00:54:54Z",
"product_status:known_affected": "636",
"product_status:known_not_affected": "97",
"product_status:recommended": "252",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-68286",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68286.json",
"version": "11"
}
}
}
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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
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