CVE-2022-50772 (GCVE-0-2022-50772)

Vulnerability from cvelistv5 – Published: 2025-12-24 13:06 – Updated: 2025-12-24 13:06
VLAI?
Title
netdevsim: fix memory leak in nsim_bus_dev_new()
Summary
In the Linux kernel, the following vulnerability has been resolved: netdevsim: fix memory leak in nsim_bus_dev_new() If device_register() failed in nsim_bus_dev_new(), the value of reference in nsim_bus_dev->dev is 1. obj->name in nsim_bus_dev->dev will not be released. unreferenced object 0xffff88810352c480 (size 16): comm "echo", pid 5691, jiffies 4294945921 (age 133.270s) hex dump (first 16 bytes): 6e 65 74 64 65 76 73 69 6d 31 00 00 00 00 00 00 netdevsim1...... backtrace: [<000000005e2e5e26>] __kmalloc_node_track_caller+0x3a/0xb0 [<0000000094ca4fc8>] kvasprintf+0xc3/0x160 [<00000000aad09bcc>] kvasprintf_const+0x55/0x180 [<000000009bac868d>] kobject_set_name_vargs+0x56/0x150 [<000000007c1a5d70>] dev_set_name+0xbb/0xf0 [<00000000ad0d126b>] device_add+0x1f8/0x1cb0 [<00000000c222ae24>] new_device_store+0x3b6/0x5e0 [<0000000043593421>] bus_attr_store+0x72/0xa0 [<00000000cbb1833a>] sysfs_kf_write+0x106/0x160 [<00000000d0dedb8a>] kernfs_fop_write_iter+0x3a8/0x5a0 [<00000000770b66e2>] vfs_write+0x8f0/0xc80 [<0000000078bb39be>] ksys_write+0x106/0x210 [<00000000005e55a4>] do_syscall_64+0x35/0x80 [<00000000eaa40bbc>] entry_SYSCALL_64_after_hwframe+0x46/0xb0
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 40e4fe4ce115c409c3e2fbb247085103ef1cc755 , < 77579e4065295071fbd9662f03430dca5b50b086 (git)
Affected: 40e4fe4ce115c409c3e2fbb247085103ef1cc755 , < cf2010aa1c739bab067cbc90b690d28eaa0b47da (git)
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    Linux Linux Affected: 5.2
Unaffected: 0 , < 5.2 (semver)
Unaffected: 6.0.7 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/netdevsim/bus.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "77579e4065295071fbd9662f03430dca5b50b086",
              "status": "affected",
              "version": "40e4fe4ce115c409c3e2fbb247085103ef1cc755",
              "versionType": "git"
            },
            {
              "lessThan": "cf2010aa1c739bab067cbc90b690d28eaa0b47da",
              "status": "affected",
              "version": "40e4fe4ce115c409c3e2fbb247085103ef1cc755",
              "versionType": "git"
            }
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          "product": "Linux",
          "programFiles": [
            "drivers/net/netdevsim/bus.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.2"
            },
            {
              "lessThan": "5.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.7",
              "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": "6.0.7",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetdevsim: fix memory leak in nsim_bus_dev_new()\n\nIf device_register() failed in nsim_bus_dev_new(), the value of reference\nin nsim_bus_dev-\u003edev is 1. obj-\u003ename in nsim_bus_dev-\u003edev will not be\nreleased.\n\nunreferenced object 0xffff88810352c480 (size 16):\n  comm \"echo\", pid 5691, jiffies 4294945921 (age 133.270s)\n  hex dump (first 16 bytes):\n    6e 65 74 64 65 76 73 69 6d 31 00 00 00 00 00 00  netdevsim1......\n  backtrace:\n    [\u003c000000005e2e5e26\u003e] __kmalloc_node_track_caller+0x3a/0xb0\n    [\u003c0000000094ca4fc8\u003e] kvasprintf+0xc3/0x160\n    [\u003c00000000aad09bcc\u003e] kvasprintf_const+0x55/0x180\n    [\u003c000000009bac868d\u003e] kobject_set_name_vargs+0x56/0x150\n    [\u003c000000007c1a5d70\u003e] dev_set_name+0xbb/0xf0\n    [\u003c00000000ad0d126b\u003e] device_add+0x1f8/0x1cb0\n    [\u003c00000000c222ae24\u003e] new_device_store+0x3b6/0x5e0\n    [\u003c0000000043593421\u003e] bus_attr_store+0x72/0xa0\n    [\u003c00000000cbb1833a\u003e] sysfs_kf_write+0x106/0x160\n    [\u003c00000000d0dedb8a\u003e] kernfs_fop_write_iter+0x3a8/0x5a0\n    [\u003c00000000770b66e2\u003e] vfs_write+0x8f0/0xc80\n    [\u003c0000000078bb39be\u003e] ksys_write+0x106/0x210\n    [\u003c00000000005e55a4\u003e] do_syscall_64+0x35/0x80\n    [\u003c00000000eaa40bbc\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-24T13:06:01.170Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/77579e4065295071fbd9662f03430dca5b50b086"
        },
        {
          "url": "https://git.kernel.org/stable/c/cf2010aa1c739bab067cbc90b690d28eaa0b47da"
        }
      ],
      "title": "netdevsim: fix memory leak in nsim_bus_dev_new()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50772",
    "datePublished": "2025-12-24T13:06:01.170Z",
    "dateReserved": "2025-12-24T13:02:21.547Z",
    "dateUpdated": "2025-12-24T13:06:01.170Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50772\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-24T13:16:04.020\",\"lastModified\":\"2025-12-24T13:16:04.020\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetdevsim: fix memory leak in nsim_bus_dev_new()\\n\\nIf device_register() failed in nsim_bus_dev_new(), the value of reference\\nin nsim_bus_dev-\u003edev is 1. obj-\u003ename in nsim_bus_dev-\u003edev will not be\\nreleased.\\n\\nunreferenced object 0xffff88810352c480 (size 16):\\n  comm \\\"echo\\\", pid 5691, jiffies 4294945921 (age 133.270s)\\n  hex dump (first 16 bytes):\\n    6e 65 74 64 65 76 73 69 6d 31 00 00 00 00 00 00  netdevsim1......\\n  backtrace:\\n    [\u003c000000005e2e5e26\u003e] __kmalloc_node_track_caller+0x3a/0xb0\\n    [\u003c0000000094ca4fc8\u003e] kvasprintf+0xc3/0x160\\n    [\u003c00000000aad09bcc\u003e] kvasprintf_const+0x55/0x180\\n    [\u003c000000009bac868d\u003e] kobject_set_name_vargs+0x56/0x150\\n    [\u003c000000007c1a5d70\u003e] dev_set_name+0xbb/0xf0\\n    [\u003c00000000ad0d126b\u003e] device_add+0x1f8/0x1cb0\\n    [\u003c00000000c222ae24\u003e] new_device_store+0x3b6/0x5e0\\n    [\u003c0000000043593421\u003e] bus_attr_store+0x72/0xa0\\n    [\u003c00000000cbb1833a\u003e] sysfs_kf_write+0x106/0x160\\n    [\u003c00000000d0dedb8a\u003e] kernfs_fop_write_iter+0x3a8/0x5a0\\n    [\u003c00000000770b66e2\u003e] vfs_write+0x8f0/0xc80\\n    [\u003c0000000078bb39be\u003e] ksys_write+0x106/0x210\\n    [\u003c00000000005e55a4\u003e] do_syscall_64+0x35/0x80\\n    [\u003c00000000eaa40bbc\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/77579e4065295071fbd9662f03430dca5b50b086\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cf2010aa1c739bab067cbc90b690d28eaa0b47da\",\"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.
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  • 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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