FKIE_CVE-2024-44974

Vulnerability from fkie_nvd - Published: 2024-09-04 20:15 - Updated: 2025-11-03 23:15
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: mptcp: pm: avoid possible UaF when selecting endp select_local_address() and select_signal_address() both select an endpoint entry from the list inside an RCU protected section, but return a reference to it, to be read later on. If the entry is dereferenced after the RCU unlock, reading info could cause a Use-after-Free. A simple solution is to copy the required info while inside the RCU protected section to avoid any risk of UaF later. The address ID might need to be modified later to handle the ID0 case later, so a copy seems OK to deal with.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0201d65d9806d287a00e0ba96f0321835631f63fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2b4f46f9503633dade75cb796dd1949d0e6581a1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/48e50dcbcbaaf713d82bf2da5c16aeced94ad07dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9a9afbbc3fbfca4975eea4aa5b18556db5a0c0b8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ddee5b4b6a1cc03c1e9921cf34382e094c2009f1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f2c865e9e3ca44fc06b5f73b29a954775e4dbb38
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.11
linux linux_kernel 6.11
linux linux_kernel 6.11
linux linux_kernel 6.11
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: pm: avoid possible UaF when selecting endp\n\nselect_local_address() and select_signal_address() both select an\nendpoint entry from the list inside an RCU protected section, but return\na reference to it, to be read later on. If the entry is dereferenced\nafter the RCU unlock, reading info could cause a Use-after-Free.\n\nA simple solution is to copy the required info while inside the RCU\nprotected section to avoid any risk of UaF later. The address ID might\nneed to be modified later to handle the ID0 case later, so a copy seems\nOK to deal with."
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mptcp: pm: evitar posible UaF al seleccionar endp select_local_address() y select_signal_address() seleccionan una entrada de endpoint de la lista dentro de una secci\u00f3n protegida de RCU, pero devuelven una referencia a ella, para leerla m\u00e1s tarde. Si se desreferencia la entrada despu\u00e9s del desbloqueo de RCU, leer informaci\u00f3n podr\u00eda causar un Use-after-Free. Una soluci\u00f3n simple es copiar la informaci\u00f3n requerida mientras se est\u00e1 dentro de la secci\u00f3n protegida de RCU para evitar cualquier riesgo de UaF m\u00e1s adelante. Es posible que el ID de la direcci\u00f3n deba modificarse m\u00e1s tarde para manejar el caso ID0 m\u00e1s tarde, por lo que una copia parece ser una buena opci\u00f3n."
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  "id": "CVE-2024-44974",
  "lastModified": "2025-11-03T23:15:45.580",
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          "baseScore": 7.8,
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
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  • 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.
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