CVE-2026-53011 (GCVE-0-2026-53011)
Vulnerability from cvelistv5
Published
2026-06-24 16:29
Modified
2026-10-19 19:47
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: taprio: fix use-after-free in advance_sched() on schedule switch In advance_sched(), when should_change_schedules() returns true, switch_schedules() is called to promote the admin schedule to oper. switch_schedules() queues the old oper schedule for RCU freeing via call_rcu(), but 'next' still points into an entry of the old oper schedule. The subsequent 'next->end_time = end_time' and rcu_assign_pointer(q->current_entry, next) are use-after-free. Fix this by selecting 'next' from the new oper schedule immediately after switch_schedules(), and using its pre-calculated end_time. setup_first_end_time() sets the first entry's end_time to base_time + interval when the schedule is installed, so the value is already correct. The deleted 'end_time = sched_base_time(admin)' assignment was also harmful independently: it would overwrite the new first entry's pre-calculated end_time with just base_time.
References
Impacted products
Vendor Product Version
Linux Linux Version: a3d43c0d56f1b94e74963a2fbadfb70126d92213
Version: a3d43c0d56f1b94e74963a2fbadfb70126d92213
Version: a3d43c0d56f1b94e74963a2fbadfb70126d92213
Version: a3d43c0d56f1b94e74963a2fbadfb70126d92213
Version: a3d43c0d56f1b94e74963a2fbadfb70126d92213
Version: a3d43c0d56f1b94e74963a2fbadfb70126d92213
Version: a3d43c0d56f1b94e74963a2fbadfb70126d92213
Version: a3d43c0d56f1b94e74963a2fbadfb70126d92213
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      "cveMetadata": "{\"cveId\": \"CVE-2026-53011\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"Linux\", \"dateReserved\": \"2026-06-09T07:44:35.378Z\", \"datePublished\": \"2026-06-24T16:29:22.082Z\", \"dateUpdated\": \"2026-10-19T19:47:13.860Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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