{
  "cveId": "CVE-2026-64073",
  "url": "https://patchblox.com/security/cve/CVE-2026-64073",
  "summary": "CVE-2026-64073 is fixed in 71 products on 1 platform, first by ALAS2023-2026-1882, released June 22, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  irq_work: Fix use-after-free in irq_work_single(...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  irq_work: Fix use-after-free in irq_work_single() on PREEMPT_RT  On PREEMPT_RT, non-HARD irq_work runs in per-CPU kthreads via run_irq_workd(), so irq_work_sync() uses rcuwait() to wait for BUSY==0.  After irq_work_single() clears BUSY via atomic_cmpxchg(), it still dereferences @work for irq_work_is_hard() and rcuwait_wake_up().  An irq_work_sync() caller on another CPU that enters after BUSY is cleared can observe BUSY==0 immediately, return, and free the work before those accesses complete \u2014 causing a use-after-free.  Fix this by wrapping run_irq_workd() in guard(rcu)() so that the entire irq_work_single() execution is within an RCU read-side critical section. Then add synchronize_rcu() in irq_work_sync() after rcuwait_wait_event() to ensure the caller waits for the RCU grace period before returning, preventing premature frees.",
  "published": "2026-06-22T09:00:00Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00133,
  "epssPercentile": 0.02838,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
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      "product": "bpftool",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.175-219.357.amzn2023",
      "fix": "ALAS2023-2026-1882",
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      "released": "2026-06-22T09:00:00Z"
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      "fix": "ALAS2023-2026-1894",
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      "released": "2026-06-22T09:00:00Z"
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