CVE-2022-48872 (GCVE-0-2022-48872)

Vulnerability from cvelistv5 – Published: 2024-08-21 06:10 – Updated: 2026-08-05 08:52
VLAI
Title
misc: fastrpc: Fix use-after-free race condition for maps
Summary
In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: Fix use-after-free race condition for maps It is possible that in between calling fastrpc_map_get() until map->fl->lock is taken in fastrpc_free_map(), another thread can call fastrpc_map_lookup() and get a reference to a map that is about to be deleted. Rewrite fastrpc_map_get() to only increase the reference count of a map if it's non-zero. Propagate this to callers so they can know if a map is about to be deleted. Fixes this warning: refcount_t: addition on 0; use-after-free. WARNING: CPU: 5 PID: 10100 at lib/refcount.c:25 refcount_warn_saturate ... Call trace: refcount_warn_saturate [fastrpc_map_get inlined] [fastrpc_map_lookup inlined] fastrpc_map_create fastrpc_internal_invoke fastrpc_device_ioctl __arm64_sys_ioctl invoke_syscall
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: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:05 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 , < 556dfdb226ce1e5231d8836159b23f8bb0395bf4 (git)
Affected: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 , < b171d0d2cf1b8387c72c8d325c5d5746fa271e39 (git)
Affected: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 , < 61a0890cb95afec5c8a2f4a879de2b6220984ef1 (git)
Affected: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 , < 079c78c68714f7d8d58e66c477b0243b31806907 (git)
Affected: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 , < 96b328d119eca7563c1edcc4e1039a62e6370ecb (git)
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Linux Linux Affected: 5.1
Unaffected: 0 , < 5.1 (semver)
Unaffected: 5.4.230 , ≤ 5.4.* (semver)
Unaffected: 5.10.165 , ≤ 5.10.* (semver)
Unaffected: 5.15.90 , ≤ 5.15.* (semver)
Unaffected: 6.1.8 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: Fix use-after-free race condition for maps\n\nIt is possible that in between calling fastrpc_map_get() until\nmap-\u003efl-\u003elock is taken in fastrpc_free_map(), another thread can call\nfastrpc_map_lookup() and get a reference to a map that is about to be\ndeleted.\n\nRewrite fastrpc_map_get() to only increase the reference count of a map\nif it\u0027s non-zero. Propagate this to callers so they can know if a map is\nabout to be deleted.\n\nFixes this warning:\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 5 PID: 10100 at lib/refcount.c:25 refcount_warn_saturate\n...\nCall trace:\n refcount_warn_saturate\n [fastrpc_map_get inlined]\n [fastrpc_map_lookup inlined]\n fastrpc_map_create\n fastrpc_internal_invoke\n fastrpc_device_ioctl\n __arm64_sys_ioctl\n invoke_syscall"
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          {
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            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: misc: fastrpc: corrige la condici\u00f3n de ejecuci\u00f3n de use-after-free para mapas. Es posible que entre llamadas a fastrpc_map_get() hasta que se tome map-\u0026gt;fl-\u0026gt;lock en fastrpc_free_map() , otro hilo puede llamar a fastrpc_map_lookup() y obtener una referencia a un mapa que est\u00e1 a punto de ser eliminado. Vuelva a escribir fastrpc_map_get() para aumentar solo el recuento de referencias de un mapa si no es cero. Propague esto a las personas que llaman para que puedan saber si un mapa est\u00e1 a punto de ser eliminado. Corrige esta advertencia: refcount_t: adici\u00f3n en 0; use-after-free. ADVERTENCIA: CPU: 5 PID: 10100 en lib/refcount.c:25 refcount_warn_saturate... Rastreo de llamadas: refcount_warn_saturate [fastrpc_map_get inlined] [fastrpc_map_lookup inlined] fastrpc_map_create fastrpc_internal_invoke fastrpc_device_ioctl __arm64_sys_ioctl invoke_sy llamar"
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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

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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.



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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.