FKIE_CVE-2022-49416

Vulnerability from fkie_nvd - Published: 2025-02-26 07:01 - Updated: 2025-03-24 19:57
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: wifi: mac80211: fix use-after-free in chanctx code In ieee80211_vif_use_reserved_context(), when we have an old context and the new context's replace_state is set to IEEE80211_CHANCTX_REPLACE_NONE, we free the old context in ieee80211_vif_use_reserved_reassign(). Therefore, we cannot check the old_ctx anymore, so we should set it to NULL after this point. However, since the new_ctx replace state is clearly not IEEE80211_CHANCTX_REPLACES_OTHER, we're not going to do anything else in this function and can just return to avoid accessing the freed old_ctx.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/265bec4779a38b65e86a25120370f200822dfa76Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2965c4cdf7ad9ce0796fac5e57debb9519ea721ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4ba81e794f0fad6234f644c2da1ae14d5b95e1c4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4f05a9e15edcdf5b97e0d86ab6ecd5f187289f6cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6118bbdf69f4718b02d26bbcf2e497eb66004331Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/82c8e7bbdd06c7ed58e22450cc5b37f33a25bb2cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/88cc8f963febe192d6ded9df7217f92f380b449aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9f1e5cc85ad77e52f54049a94db0407445ae2a34Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b79110f2bf6022e60e590d2e094728a8eec3e79ePatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

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    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix use-after-free in chanctx code\n\nIn ieee80211_vif_use_reserved_context(), when we have an\nold context and the new context\u0027s replace_state is set to\nIEEE80211_CHANCTX_REPLACE_NONE, we free the old context\nin ieee80211_vif_use_reserved_reassign(). Therefore, we\ncannot check the old_ctx anymore, so we should set it to\nNULL after this point.\n\nHowever, since the new_ctx replace state is clearly not\nIEEE80211_CHANCTX_REPLACES_OTHER, we\u0027re not going to do\nanything else in this function and can just return to\navoid accessing the freed old_ctx."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: mac80211: correcci\u00f3n de use-after-free en el c\u00f3digo chanctx En ieee80211_vif_use_reserved_context(), cuando tenemos un contexto antiguo y el replace_state del nuevo contexto est\u00e1 configurado en IEEE80211_CHANCTX_REPLACE_NONE, liberamos el contexto antiguo en ieee80211_vif_use_reserved_reassign(). Por lo tanto, ya no podemos verificar el old_ctx, por lo que deber\u00edamos configurarlo en NULL despu\u00e9s de este punto. Sin embargo, dado que el estado de reemplazo de new_ctx claramente no es IEEE80211_CHANCTX_REPLACES_OTHER, no vamos a hacer nada m\u00e1s en esta funci\u00f3n y podemos simplemente regresar para evitar acceder al old_ctx liberado."
    }
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  "id": "CVE-2022-49416",
  "lastModified": "2025-03-24T19:57:30.150",
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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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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