CVE-2022-49405 (GCVE-0-2022-49405)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:12 – Updated: 2026-08-05 08:55
VLAI
Title
staging: r8188eu: prevent ->Ssid overflow in rtw_wx_set_scan()
Summary
In the Linux kernel, the following vulnerability has been resolved: staging: r8188eu: prevent ->Ssid overflow in rtw_wx_set_scan() This code has a check to prevent read overflow but it needs another check to prevent writing beyond the end of the ->Ssid[] array.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7056 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2b42bd58b32155a1be4dd78991845dec05aaef9e , < ac2eab7de458f5e1210ce1237afab40a307075c8 (git)
Affected: 2b42bd58b32155a1be4dd78991845dec05aaef9e , < c4bd6b72df4f01aa866ceb298466d6d07a6bd525 (git)
Affected: 2b42bd58b32155a1be4dd78991845dec05aaef9e , < 476bfda0be0f9669add92bff604ca78226cf53d1 (git)
Affected: 2b42bd58b32155a1be4dd78991845dec05aaef9e , < bc10916e890948d8927a5c8c40fb5dc44be5e1b8 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (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.
Show details on NVD website
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: r8188eu: prevent -\u003eSsid overflow in rtw_wx_set_scan()\n\nThis code has a check to prevent read overflow but it needs another\ncheck to prevent writing beyond the end of the -\u003eSsid[] array."
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              "value": "AV:L - The overflow is reached only via local wireless-extensions ioctls (SIOCSIWSCAN or SIOCSIWPRIV\u2192rtw_wx_set_priv) that deliver an attacker-crafted CSCAN buffer into rtw_wx_set_scan(); no received WiFi frame or remote peer path invokes this parser.\nAC:L - The attacker fully controls the CSCAN section type, sec_len, and payload in a single ioctl, and the missing Ssid[32] bound check makes the stack overflow deterministic with no race or attacker-uncontrollable condition.\nPR:L - wext_permission_check() requires capable(CAP_NET_ADMIN), a capability routinely held by non-root WiFi management daemons (wpa_supplicant/NetworkManager) on the phones and embedded devices this USB RTL8188EU driver targets, and this CNA consistently scores CAP_NET_ADMIN-gated WEXT bugs as PR:L.\nUI:N - The attacker issues the ioctl directly against an already-registered r8188eu interface; no victim action such as mounting media or opening a crafted file is required.\nS:U - The stack overflow corrupts kernel stack/memory within the same host kernel security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - Attacker-controlled out-of-bounds stack writes (and unbounded ssid_index growth past RTW_SSID_SCAN_AMOUNT) are memory-corruption primitives that can be leveraged for arbitrary kernel memory disclosure under standard stack-smash exploitation.\nI:H - This is a classic stack buffer overflow of Ssid[32] with attacker-chosen length and contents, enabling overwrite of adjacent stack state and return addresses for arbitrary write / control-flow hijack.\nA:H - Corrupting the on-stack ssid[RTW_SSID_SCAN_AMOUNT] array and frames beyond it reliably produces kernel oops/panic even without full code-execution exploitation."
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      "cve": "CVE-2022-49405",
      "id": "CVE-2022-49405",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: staging: r8188eu: prevent -\u003eSsid overflow in rtw_wx_set_scan()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49405.json",
      "version": "3"
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      "current_release_date": "2026-10-18T00:36:17Z",
      "cve": "CVE-2022-49405",
      "id": "CVE-2022-49405",
      "initial_release_date": "2025-02-27T03:07:26Z",
      "product_status:known_affected": "0",
      "product_status:known_not_affected": "462",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49405",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2025/cve-2022-49405.json",
      "version": "16"
    }
  }
}



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