CVE-2026-53011 (GCVE-0-2026-53011)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-06-28 06:38
VLAI
Title
net/sched: taprio: fix use-after-free in advance_sched() on schedule switch
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a3d43c0d56f1b94e74963a2fbadfb70126d92213 , < a8fc396519ef4f081bc545e88f61241728bb78d7 (git)
Affected: a3d43c0d56f1b94e74963a2fbadfb70126d92213 , < 3471874578160a28c171a607fa069f24062634b8 (git)
Affected: a3d43c0d56f1b94e74963a2fbadfb70126d92213 , < 7256996e1ef553716817f3bfd077c2f3b48b582f (git)
Affected: a3d43c0d56f1b94e74963a2fbadfb70126d92213 , < eee072fe16c646190d33ae69c9983d8de1562bf8 (git)
Affected: a3d43c0d56f1b94e74963a2fbadfb70126d92213 , < 1bd286fa3e21200133478ed523cc6a2788baf38a (git)
Affected: a3d43c0d56f1b94e74963a2fbadfb70126d92213 , < b73235da5dde77ed1264f9767b62c28c9d71fd78 (git)
Affected: a3d43c0d56f1b94e74963a2fbadfb70126d92213 , < 0e62171df8ed4804d00db088f17eed06468233fa (git)
Affected: a3d43c0d56f1b94e74963a2fbadfb70126d92213 , < 105425b1969c5affe532713cfac1c0b320d7ac2b (git)
Create a notification for this product.
Linux Linux Affected: 5.2
Unaffected: 0 , < 5.2 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.141 , ≤ 6.6.* (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "dateReserved": "2026-06-09T07:44:35.378Z",
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  }
}


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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.


Detection rules are retrieved from Rulezet.