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CVE-2024-50127 (GCVE-0-2024-50127)

Vulnerability from cvelistv5 – Published: 2024-11-05 17:10 – Updated: 2026-08-05 11:41
VLAI
Title
net: sched: fix use-after-free in taprio_change()
Summary
In the Linux kernel, the following vulnerability has been resolved: net: sched: fix use-after-free in taprio_change() In 'taprio_change()', 'admin' pointer may become dangling due to sched switch / removal caused by 'advance_sched()', and critical section protected by 'q->current_entry_lock' is too small to prevent from such a scenario (which causes use-after-free detected by KASAN). Fix this by prefer 'rcu_replace_pointer()' over 'rcu_assign_pointer()' to update 'admin' immediately before an attempt to schedule freeing.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-12-11 14:28 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a3d43c0d56f1b94e74963a2fbadfb70126d92213 , < 2f868ce6013548a713c431c679ef73747a66fcf3 (git)
Affected: a3d43c0d56f1b94e74963a2fbadfb70126d92213 , < 8a283a19026aaae8a773fd8061263cfa315b127f (git)
Affected: a3d43c0d56f1b94e74963a2fbadfb70126d92213 , < 999612996df28d81f163dad530d7f8026e03aec6 (git)
Affected: a3d43c0d56f1b94e74963a2fbadfb70126d92213 , < fe371f084073e8672a2d7d46b335c3c060d1e301 (git)
Affected: a3d43c0d56f1b94e74963a2fbadfb70126d92213 , < 0d4c0d2844e4eac3aed647f948fd7e60eea56a61 (git)
Affected: a3d43c0d56f1b94e74963a2fbadfb70126d92213 , < 2240f9376f20f8b6463232b4ca7292569217237f (git)
Affected: a3d43c0d56f1b94e74963a2fbadfb70126d92213 , < f504465970aebb2467da548f7c1efbbf36d0f44b (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.2
Unaffected: 0 , < 5.2 (semver)
Unaffected: 5.4.285 , ≤ 5.4.* (semver)
Unaffected: 5.10.229 , ≤ 5.10.* (semver)
Unaffected: 5.15.170 , ≤ 5.15.* (semver)
Unaffected: 6.1.115 , ≤ 6.1.* (semver)
Unaffected: 6.6.59 , ≤ 6.6.* (semver)
Unaffected: 6.11.6 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
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\nnet: sched: fix use-after-free in taprio_change()\n\nIn \u0027taprio_change()\u0027, \u0027admin\u0027 pointer may become dangling due to sched\nswitch / removal caused by \u0027advance_sched()\u0027, and critical section\nprotected by \u0027q-\u003ecurrent_entry_lock\u0027 is too small to prevent from such\na scenario (which causes use-after-free detected by KASAN). Fix this\nby prefer \u0027rcu_replace_pointer()\u0027 over \u0027rcu_assign_pointer()\u0027 to update\n\u0027admin\u0027 immediately before an attempt to schedule freeing."
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            "value": " En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: sched: arreglado use-after-free en taprio_change(). En \u0027taprio_change()\u0027, el puntero \u0027admin\u0027 puede quedar colgando debido al cambio/eliminaci\u00f3n de sched causado por \u0027advance_sched()\u0027, y la secci\u00f3n cr\u00edtica protegida por \u0027q-\u0026gt;current_entry_lock\u0027 es demasiado peque\u00f1a para evitar tal escenario (que causa el use-after-free detectado por KASAN). Solucione esto al preferir \u0027rcu_replace_pointer()\u0027 sobre \u0027rcu_assign_pointer()\u0027 para actualizar \u0027admin\u0027 inmediatamente antes de un intento de liberaci\u00f3n de programaci\u00f3n."
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      "product_status:known_affected": "22",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: net: sched: fix use-after-free in taprio_change()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-50127.json",
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}



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Tags
Taxonomy of the tags.





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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.