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CVE-2022-49416 (GCVE-0-2022-49416)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:12 – Updated: 2026-08-05 08:55
VLAI
Title
wifi: mac80211: fix use-after-free in chanctx code
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.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/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
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-27 18:16 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < 88cc8f963febe192d6ded9df7217f92f380b449a (git)
Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < 4ba81e794f0fad6234f644c2da1ae14d5b95e1c4 (git)
Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < 9f1e5cc85ad77e52f54049a94db0407445ae2a34 (git)
Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < 265bec4779a38b65e86a25120370f200822dfa76 (git)
Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < 6118bbdf69f4718b02d26bbcf2e497eb66004331 (git)
Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < b79110f2bf6022e60e590d2e094728a8eec3e79e (git)
Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < 82c8e7bbdd06c7ed58e22450cc5b37f33a25bb2c (git)
Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < 4f05a9e15edcdf5b97e0d86ab6ecd5f187289f6c (git)
Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < 2965c4cdf7ad9ce0796fac5e57debb9519ea721e (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.17
Unaffected: 0 , < 3.17 (semver)
Unaffected: 4.9.318 , ≤ 4.9.* (semver)
Unaffected: 4.14.283 , ≤ 4.14.* (semver)
Unaffected: 4.19.247 , ≤ 4.19.* (semver)
Unaffected: 5.4.198 , ≤ 5.4.* (semver)
Unaffected: 5.10.121 , ≤ 5.10.* (semver)
Unaffected: 5.15.46 , ≤ 5.15.* (semver)
Unaffected: 5.17.14 , ≤ 5.17.* (semver)
Unaffected: 5.18.3 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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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."
          }
        ],
        "id": "CVE-2022-49416",
        "lastModified": "2026-08-04T10:17:47.600",
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      "id": "CVE-2022-49416",
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      "product_status:fixed": "321",
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      "version": "3"
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      "current_release_date": "2026-08-29T02:28:15Z",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49416",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49416.json",
      "version": "57"
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}



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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

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.