CVE-2022-50732 (GCVE-0-2022-50732)
Vulnerability from cvelistv5
Published
2025-12-24 12:22
Modified
2026-08-05 08:59
Severity ?
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8192u: Fix use after free in ieee80211_rx() We cannot dereference the "skb" pointer after calling ieee80211_monitor_rx(), because it is a use after free.
References
Impacted products
Vendor Product Version
Linux Linux Version: 8fc8598e61f6f384f3eaf1d9b09500c12af47b37
Version: 8fc8598e61f6f384f3eaf1d9b09500c12af47b37
Version: 8fc8598e61f6f384f3eaf1d9b09500c12af47b37
Version: 8fc8598e61f6f384f3eaf1d9b09500c12af47b37
Version: 8fc8598e61f6f384f3eaf1d9b09500c12af47b37
Version: 8fc8598e61f6f384f3eaf1d9b09500c12af47b37
Version: 8fc8598e61f6f384f3eaf1d9b09500c12af47b37
Version: 8fc8598e61f6f384f3eaf1d9b09500c12af47b37
Version: 8fc8598e61f6f384f3eaf1d9b09500c12af47b37
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9c03db0ec84b7964a11b20706665c99a5fead332",
              "status": "affected",
              "version": "8fc8598e61f6f384f3eaf1d9b09500c12af47b37",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "8fc8598e61f6f384f3eaf1d9b09500c12af47b37",
              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
            {
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            },
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              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "8fc8598e61f6f384f3eaf1d9b09500c12af47b37",
              "versionType": "git"
            },
            {
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            },
            {
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              "status": "affected",
              "version": "8fc8598e61f6f384f3eaf1d9b09500c12af47b37",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.33"
            },
            {
              "lessThan": "2.6.33",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.337",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.303",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.229",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.163",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.337",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.303",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.270",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.229",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.163",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.86",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.16",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.2",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2",
                  "versionStartIncluding": "2.6.33",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8192u: Fix use after free in ieee80211_rx()\n\nWe cannot dereference the \"skb\" pointer after calling\nieee80211_monitor_rx(), because it is a use after free."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The UAF is in the rtl8192u 802.11 RX path (USB ISR \u2192 tasklet \u2192 rtl8192_rx_nomal \u2192 ieee80211_rx) and is triggered by over-the-air WiFi frames while the adapter is in monitor mode, so the attacker must be on the same RF/LAN segment (WiFi frame injection = Adjacent).\nAC:L - Once the interface is in monitor mode, any received frame takes the ieee80211_monitor_rx \u2192 netif_rx(skb) path and then reads skb-\u003elen; an adjacent attacker can flood frames to force backlog drops (kfree_skb) or RPS cross-CPU reclaim, so the UAF is reliably attacker-driven with no uncontrollable race.\nPR:N - Frame delivery runs in the driver softirq/tasklet with no host authentication or capability check; the attacker needs no account on the victim and only needs to inject WiFi frames toward a monitor-mode RTL8192U interface.\nUI:N - In the worst reasonable deployment (WiFi monitoring/IDS/pentest with the dongle already in monitor mode), frames are processed automatically in kernel RX context with no further victim action such as opening a file or confirming a prompt.\nS:U - The sk_buff use-after-free corrupts host kernel heap state within the same OS security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - After netif_rx() hands off the skb it may be freed (backlog drop or RPS on another CPU) before the dangling skb-\u003elen read, enabling reclaim of the sk_buff slab object and disclosure of reused kernel memory, scored High per UAF guidance (same pattern as CVE-2023-53432).\nI:H - Use-after-free of a general-purpose sk_buff slab object is a classic heap-grooming primitive that can yield attacker-controlled object reuse and control-flow hijacking, so integrity impact is High per kernel UAF scoring guidance.\nA:H - Dereferencing a freed sk_buff can oops/panic the kernel, and an adjacent attacker can repeatedly inject frames to crash the host at will."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:59:31.519Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9c03db0ec84b7964a11b20706665c99a5fead332"
        },
        {
          "url": "https://git.kernel.org/stable/c/fdc62d31d50e4ce5d8f363fcb8299ba0e00ee6fd"
        },
        {
          "url": "https://git.kernel.org/stable/c/a0df8d44b555ae09729d6533fd4532977563c7b9"
        },
        {
          "url": "https://git.kernel.org/stable/c/288ada16a93aab5aa2ebea8190aafdb35b716854"
        },
        {
          "url": "https://git.kernel.org/stable/c/daa8045a991363ccdae5615d170f35aa1135e7a7"
        },
        {
          "url": "https://git.kernel.org/stable/c/b0aaec894a909c88117c8bda6c7c9b26cf7c744b"
        },
        {
          "url": "https://git.kernel.org/stable/c/de174163c0d319ff06d622e79130a0017c8f5a6e"
        },
        {
          "url": "https://git.kernel.org/stable/c/73df1172bbcc8d45cd28e3b1a9ca2edb2f9f7ce6"
        },
        {
          "url": "https://git.kernel.org/stable/c/bcc5e2dcf09089b337b76fc1a589f6ff95ca19ac"
        }
      ],
      "title": "staging: rtl8192u: Fix use after free in ieee80211_rx()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50732",
    "datePublished": "2025-12-24T12:22:51.933Z",
    "dateReserved": "2025-12-24T12:20:40.331Z",
    "dateUpdated": "2026-08-05T08:59:31.519Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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