CVE-2022-50709 (GCVE-0-2022-50709)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:55 – Updated: 2025-12-24 10:55
VLAI?
Title
wifi: ath9k: avoid uninit memory read in ath9k_htc_rx_msg()
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: ath9k: avoid uninit memory read in ath9k_htc_rx_msg() syzbot is reporting uninit value at ath9k_htc_rx_msg() [1], for ioctl(USB_RAW_IOCTL_EP_WRITE) can call ath9k_hif_usb_rx_stream() with pkt_len = 0 but ath9k_hif_usb_rx_stream() uses __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC) based on an assumption that pkt_len is valid. As a result, ath9k_hif_usb_rx_stream() allocates skb with uninitialized memory and ath9k_htc_rx_msg() is reading from uninitialized memory. Since bytes accessed by ath9k_htc_rx_msg() is not known until ath9k_htc_rx_msg() is called, it would be difficult to check minimal valid pkt_len at "if (pkt_len > 2 * MAX_RX_BUF_SIZE) {" line in ath9k_hif_usb_rx_stream(). We have two choices. One is to workaround by adding __GFP_ZERO so that ath9k_htc_rx_msg() sees 0 if pkt_len is invalid. The other is to let ath9k_htc_rx_msg() validate pkt_len before accessing. This patch chose the latter. Note that I'm not sure threshold condition is correct, for I can't find details on possible packet length used by this protocol.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f3d2a3b7e290d0bdbddfcee5a6c3d922e2b7e02a (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 84242f15f911f34aec9b22f99d1e9bff19723dbe (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2c485f4f2a64258acc5228e78ffb828c68d9e770 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9661724f6206bd606ecf13acada676a9975d230b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b1b4144508adfc585e43856b31baaf9008a3beb4 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0d2649b288b7b9484e3d4380c0d6c4720a17e473 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4891a50f5ed8bfcb8f2a4b816b0676f398687783 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b383e8abed41cc6ff1a3b34de75df9397fa4878c (git)
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    Linux Linux Unaffected: 4.14.296 , ≤ 4.14.* (semver)
Unaffected: 4.19.262 , ≤ 4.19.* (semver)
Unaffected: 5.4.220 , ≤ 5.4.* (semver)
Unaffected: 5.10.150 , ≤ 5.10.* (semver)
Unaffected: 5.15.75 , ≤ 5.15.* (semver)
Unaffected: 5.19.17 , ≤ 5.19.* (semver)
Unaffected: 6.0.3 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/ath/ath9k/htc_hst.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "84242f15f911f34aec9b22f99d1e9bff19723dbe",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
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            {
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              "status": "affected",
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              "versionType": "git"
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              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
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            {
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/ath/ath9k/htc_hst.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.296",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.262",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.220",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.150",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.296",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "4.19.262",
                  "vulnerable": true
                },
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                  "versionEndExcluding": "5.4.220",
                  "vulnerable": true
                },
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                  "versionEndExcluding": "5.10.150",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.75",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath9k: avoid uninit memory read in ath9k_htc_rx_msg()\n\nsyzbot is reporting uninit value at ath9k_htc_rx_msg() [1], for\nioctl(USB_RAW_IOCTL_EP_WRITE) can call ath9k_hif_usb_rx_stream() with\npkt_len = 0 but ath9k_hif_usb_rx_stream() uses\n__dev_alloc_skb(pkt_len + 32, GFP_ATOMIC) based on an assumption that\npkt_len is valid. As a result, ath9k_hif_usb_rx_stream() allocates skb\nwith uninitialized memory and ath9k_htc_rx_msg() is reading from\nuninitialized memory.\n\nSince bytes accessed by ath9k_htc_rx_msg() is not known until\nath9k_htc_rx_msg() is called, it would be difficult to check minimal valid\npkt_len at \"if (pkt_len \u003e 2 * MAX_RX_BUF_SIZE) {\" line in\nath9k_hif_usb_rx_stream().\n\nWe have two choices. One is to workaround by adding __GFP_ZERO so that\nath9k_htc_rx_msg() sees 0 if pkt_len is invalid. The other is to let\nath9k_htc_rx_msg() validate pkt_len before accessing. This patch chose\nthe latter.\n\nNote that I\u0027m not sure threshold condition is correct, for I can\u0027t find\ndetails on possible packet length used by this protocol."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-24T10:55:23.194Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f3d2a3b7e290d0bdbddfcee5a6c3d922e2b7e02a"
        },
        {
          "url": "https://git.kernel.org/stable/c/84242f15f911f34aec9b22f99d1e9bff19723dbe"
        },
        {
          "url": "https://git.kernel.org/stable/c/2c485f4f2a64258acc5228e78ffb828c68d9e770"
        },
        {
          "url": "https://git.kernel.org/stable/c/9661724f6206bd606ecf13acada676a9975d230b"
        },
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          "url": "https://git.kernel.org/stable/c/b1b4144508adfc585e43856b31baaf9008a3beb4"
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        },
        {
          "url": "https://git.kernel.org/stable/c/4891a50f5ed8bfcb8f2a4b816b0676f398687783"
        },
        {
          "url": "https://git.kernel.org/stable/c/b383e8abed41cc6ff1a3b34de75df9397fa4878c"
        }
      ],
      "title": "wifi: ath9k: avoid uninit memory read in ath9k_htc_rx_msg()",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50709",
    "datePublished": "2025-12-24T10:55:23.194Z",
    "dateReserved": "2025-12-24T10:53:15.518Z",
    "dateUpdated": "2025-12-24T10:55:23.194Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50709\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-24T11:15:51.080\",\"lastModified\":\"2025-12-29T15:58:56.260\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nwifi: ath9k: avoid uninit memory read in ath9k_htc_rx_msg()\\n\\nsyzbot is reporting uninit value at ath9k_htc_rx_msg() [1], for\\nioctl(USB_RAW_IOCTL_EP_WRITE) can call ath9k_hif_usb_rx_stream() with\\npkt_len = 0 but ath9k_hif_usb_rx_stream() uses\\n__dev_alloc_skb(pkt_len + 32, GFP_ATOMIC) based on an assumption that\\npkt_len is valid. As a result, ath9k_hif_usb_rx_stream() allocates skb\\nwith uninitialized memory and ath9k_htc_rx_msg() is reading from\\nuninitialized memory.\\n\\nSince bytes accessed by ath9k_htc_rx_msg() is not known until\\nath9k_htc_rx_msg() is called, it would be difficult to check minimal valid\\npkt_len at \\\"if (pkt_len \u003e 2 * MAX_RX_BUF_SIZE) {\\\" line in\\nath9k_hif_usb_rx_stream().\\n\\nWe have two choices. One is to workaround by adding __GFP_ZERO so that\\nath9k_htc_rx_msg() sees 0 if pkt_len is invalid. The other is to let\\nath9k_htc_rx_msg() validate pkt_len before accessing. This patch chose\\nthe latter.\\n\\nNote that I\u0027m not sure threshold condition is correct, for I can\u0027t find\\ndetails on possible packet length used by this protocol.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0d2649b288b7b9484e3d4380c0d6c4720a17e473\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2c485f4f2a64258acc5228e78ffb828c68d9e770\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4891a50f5ed8bfcb8f2a4b816b0676f398687783\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/84242f15f911f34aec9b22f99d1e9bff19723dbe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9661724f6206bd606ecf13acada676a9975d230b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b1b4144508adfc585e43856b31baaf9008a3beb4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b383e8abed41cc6ff1a3b34de75df9397fa4878c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f3d2a3b7e290d0bdbddfcee5a6c3d922e2b7e02a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • 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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