FKIE_CVE-2024-50127

Vulnerability from fkie_nvd - Published: 2024-11-05 18:15 - Updated: 2025-11-03 23:16
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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: 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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0d4c0d2844e4eac3aed647f948fd7e60eea56a61Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2240f9376f20f8b6463232b4ca7292569217237fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2f868ce6013548a713c431c679ef73747a66fcf3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8a283a19026aaae8a773fd8061263cfa315b127fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/999612996df28d81f163dad530d7f8026e03aec6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f504465970aebb2467da548f7c1efbbf36d0f44bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fe371f084073e8672a2d7d46b335c3c060d1e301Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.12
linux linux_kernel 6.12
linux linux_kernel 6.12
linux linux_kernel 6.12
To clipboard 

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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."
    },
    {
      "lang": "es",
      "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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  "id": "CVE-2024-50127",
  "lastModified": "2025-11-03T23:16:53.057",
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Sightings

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  • 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.
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  • 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.