CVE-2026-68286 (GCVE-0-2026-68286)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:02 – Updated: 2026-10-03 10:55
VLAI
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
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
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)
guessed Create a notification for this product.
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)
guessed Create a notification for this product.
Show details on NVD website
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          "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."
        }
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    "dateReserved": "2026-07-30T09:28:09.379Z",
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    "state": "PUBLISHED"
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            "lang": "en",
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        "id": "CVE-2026-68286",
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      "title": "kernel: drop_monitor: perform u64_stats updates under IRQ-disabled section",
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      "title": "SUSE CVE CVE-2026-68286",
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    }
  }
}



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