CVE-2022-50702 (GCVE-0-2022-50702)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:55 – Updated: 2025-12-24 10:55
VLAI?
Title
vdpa_sim: fix possible memory leak in vdpasim_net_init() and vdpasim_blk_init()
Summary
In the Linux kernel, the following vulnerability has been resolved: vdpa_sim: fix possible memory leak in vdpasim_net_init() and vdpasim_blk_init() Inject fault while probing module, if device_register() fails in vdpasim_net_init() or vdpasim_blk_init(), but the refcount of kobject is not decreased to 0, the name allocated in dev_set_name() is leaked. Fix this by calling put_device(), so that name can be freed in callback function kobject_cleanup(). (vdpa_sim_net) unreferenced object 0xffff88807eebc370 (size 16): comm "modprobe", pid 3848, jiffies 4362982860 (age 18.153s) hex dump (first 16 bytes): 76 64 70 61 73 69 6d 5f 6e 65 74 00 6b 6b 6b a5 vdpasim_net.kkk. backtrace: [<ffffffff8174f19e>] __kmalloc_node_track_caller+0x4e/0x150 [<ffffffff81731d53>] kstrdup+0x33/0x60 [<ffffffff83a5d421>] kobject_set_name_vargs+0x41/0x110 [<ffffffff82d87aab>] dev_set_name+0xab/0xe0 [<ffffffff82d91a23>] device_add+0xe3/0x1a80 [<ffffffffa0270013>] 0xffffffffa0270013 [<ffffffff81001c27>] do_one_initcall+0x87/0x2e0 [<ffffffff813739cb>] do_init_module+0x1ab/0x640 [<ffffffff81379d20>] load_module+0x5d00/0x77f0 [<ffffffff8137bc40>] __do_sys_finit_module+0x110/0x1b0 [<ffffffff83c4d505>] do_syscall_64+0x35/0x80 [<ffffffff83e0006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0 (vdpa_sim_blk) unreferenced object 0xffff8881070c1250 (size 16): comm "modprobe", pid 6844, jiffies 4364069319 (age 17.572s) hex dump (first 16 bytes): 76 64 70 61 73 69 6d 5f 62 6c 6b 00 6b 6b 6b a5 vdpasim_blk.kkk. backtrace: [<ffffffff8174f19e>] __kmalloc_node_track_caller+0x4e/0x150 [<ffffffff81731d53>] kstrdup+0x33/0x60 [<ffffffff83a5d421>] kobject_set_name_vargs+0x41/0x110 [<ffffffff82d87aab>] dev_set_name+0xab/0xe0 [<ffffffff82d91a23>] device_add+0xe3/0x1a80 [<ffffffffa0220013>] 0xffffffffa0220013 [<ffffffff81001c27>] do_one_initcall+0x87/0x2e0 [<ffffffff813739cb>] do_init_module+0x1ab/0x640 [<ffffffff81379d20>] load_module+0x5d00/0x77f0 [<ffffffff8137bc40>] __do_sys_finit_module+0x110/0x1b0 [<ffffffff83c4d505>] do_syscall_64+0x35/0x80 [<ffffffff83e0006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a3c06ae158dd6fa8336157c31d9234689d068d02 , < 586e6fd7d581f987f7d0d2592edf0b26397e783e (git)
Affected: a3c06ae158dd6fa8336157c31d9234689d068d02 , < 5be953e353fe421f2983e1fd37f07fba97edbffc (git)
Affected: a3c06ae158dd6fa8336157c31d9234689d068d02 , < 337c24d817e28dd454ca22f1063dfad20822426e (git)
Affected: a3c06ae158dd6fa8336157c31d9234689d068d02 , < aeca7ff254843d49a8739f07f7dab1341450111d (git)
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    Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.15.87 , ≤ 5.15.* (semver)
Unaffected: 6.0.19 , ≤ 6.0.* (semver)
Unaffected: 6.1.5 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/vdpa/vdpa_sim/vdpa_sim_blk.c",
            "drivers/vdpa/vdpa_sim/vdpa_sim_net.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "586e6fd7d581f987f7d0d2592edf0b26397e783e",
              "status": "affected",
              "version": "a3c06ae158dd6fa8336157c31d9234689d068d02",
              "versionType": "git"
            },
            {
              "lessThan": "5be953e353fe421f2983e1fd37f07fba97edbffc",
              "status": "affected",
              "version": "a3c06ae158dd6fa8336157c31d9234689d068d02",
              "versionType": "git"
            },
            {
              "lessThan": "337c24d817e28dd454ca22f1063dfad20822426e",
              "status": "affected",
              "version": "a3c06ae158dd6fa8336157c31d9234689d068d02",
              "versionType": "git"
            },
            {
              "lessThan": "aeca7ff254843d49a8739f07f7dab1341450111d",
              "status": "affected",
              "version": "a3c06ae158dd6fa8336157c31d9234689d068d02",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/vdpa/vdpa_sim/vdpa_sim_blk.c",
            "drivers/vdpa/vdpa_sim/vdpa_sim_net.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "lessThan": "5.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.87",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.5",
              "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": "5.15.87",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.19",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.5",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvdpa_sim: fix possible memory leak in vdpasim_net_init() and vdpasim_blk_init()\n\nInject fault while probing module, if device_register() fails in\nvdpasim_net_init() or vdpasim_blk_init(), but the refcount of kobject is\nnot decreased to 0, the name allocated in dev_set_name() is leaked.\nFix this by calling put_device(), so that name can be freed in\ncallback function kobject_cleanup().\n\n(vdpa_sim_net)\nunreferenced object 0xffff88807eebc370 (size 16):\n  comm \"modprobe\", pid 3848, jiffies 4362982860 (age 18.153s)\n  hex dump (first 16 bytes):\n    76 64 70 61 73 69 6d 5f 6e 65 74 00 6b 6b 6b a5  vdpasim_net.kkk.\n  backtrace:\n    [\u003cffffffff8174f19e\u003e] __kmalloc_node_track_caller+0x4e/0x150\n    [\u003cffffffff81731d53\u003e] kstrdup+0x33/0x60\n    [\u003cffffffff83a5d421\u003e] kobject_set_name_vargs+0x41/0x110\n    [\u003cffffffff82d87aab\u003e] dev_set_name+0xab/0xe0\n    [\u003cffffffff82d91a23\u003e] device_add+0xe3/0x1a80\n    [\u003cffffffffa0270013\u003e] 0xffffffffa0270013\n    [\u003cffffffff81001c27\u003e] do_one_initcall+0x87/0x2e0\n    [\u003cffffffff813739cb\u003e] do_init_module+0x1ab/0x640\n    [\u003cffffffff81379d20\u003e] load_module+0x5d00/0x77f0\n    [\u003cffffffff8137bc40\u003e] __do_sys_finit_module+0x110/0x1b0\n    [\u003cffffffff83c4d505\u003e] do_syscall_64+0x35/0x80\n    [\u003cffffffff83e0006a\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\n(vdpa_sim_blk)\nunreferenced object 0xffff8881070c1250 (size 16):\n  comm \"modprobe\", pid 6844, jiffies 4364069319 (age 17.572s)\n  hex dump (first 16 bytes):\n    76 64 70 61 73 69 6d 5f 62 6c 6b 00 6b 6b 6b a5  vdpasim_blk.kkk.\n  backtrace:\n    [\u003cffffffff8174f19e\u003e] __kmalloc_node_track_caller+0x4e/0x150\n    [\u003cffffffff81731d53\u003e] kstrdup+0x33/0x60\n    [\u003cffffffff83a5d421\u003e] kobject_set_name_vargs+0x41/0x110\n    [\u003cffffffff82d87aab\u003e] dev_set_name+0xab/0xe0\n    [\u003cffffffff82d91a23\u003e] device_add+0xe3/0x1a80\n    [\u003cffffffffa0220013\u003e] 0xffffffffa0220013\n    [\u003cffffffff81001c27\u003e] do_one_initcall+0x87/0x2e0\n    [\u003cffffffff813739cb\u003e] do_init_module+0x1ab/0x640\n    [\u003cffffffff81379d20\u003e] load_module+0x5d00/0x77f0\n    [\u003cffffffff8137bc40\u003e] __do_sys_finit_module+0x110/0x1b0\n    [\u003cffffffff83c4d505\u003e] do_syscall_64+0x35/0x80\n    [\u003cffffffff83e0006a\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-24T10:55:17.831Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/586e6fd7d581f987f7d0d2592edf0b26397e783e"
        },
        {
          "url": "https://git.kernel.org/stable/c/5be953e353fe421f2983e1fd37f07fba97edbffc"
        },
        {
          "url": "https://git.kernel.org/stable/c/337c24d817e28dd454ca22f1063dfad20822426e"
        },
        {
          "url": "https://git.kernel.org/stable/c/aeca7ff254843d49a8739f07f7dab1341450111d"
        }
      ],
      "title": "vdpa_sim: fix possible memory leak in vdpasim_net_init() and vdpasim_blk_init()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50702",
    "datePublished": "2025-12-24T10:55:17.831Z",
    "dateReserved": "2025-12-24T10:53:15.517Z",
    "dateUpdated": "2025-12-24T10:55:17.831Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50702\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-24T11:15:50.360\",\"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\\nvdpa_sim: fix possible memory leak in vdpasim_net_init() and vdpasim_blk_init()\\n\\nInject fault while probing module, if device_register() fails in\\nvdpasim_net_init() or vdpasim_blk_init(), but the refcount of kobject is\\nnot decreased to 0, the name allocated in dev_set_name() is leaked.\\nFix this by calling put_device(), so that name can be freed in\\ncallback function kobject_cleanup().\\n\\n(vdpa_sim_net)\\nunreferenced object 0xffff88807eebc370 (size 16):\\n  comm \\\"modprobe\\\", pid 3848, jiffies 4362982860 (age 18.153s)\\n  hex dump (first 16 bytes):\\n    76 64 70 61 73 69 6d 5f 6e 65 74 00 6b 6b 6b a5  vdpasim_net.kkk.\\n  backtrace:\\n    [\u003cffffffff8174f19e\u003e] __kmalloc_node_track_caller+0x4e/0x150\\n    [\u003cffffffff81731d53\u003e] kstrdup+0x33/0x60\\n    [\u003cffffffff83a5d421\u003e] kobject_set_name_vargs+0x41/0x110\\n    [\u003cffffffff82d87aab\u003e] dev_set_name+0xab/0xe0\\n    [\u003cffffffff82d91a23\u003e] device_add+0xe3/0x1a80\\n    [\u003cffffffffa0270013\u003e] 0xffffffffa0270013\\n    [\u003cffffffff81001c27\u003e] do_one_initcall+0x87/0x2e0\\n    [\u003cffffffff813739cb\u003e] do_init_module+0x1ab/0x640\\n    [\u003cffffffff81379d20\u003e] load_module+0x5d00/0x77f0\\n    [\u003cffffffff8137bc40\u003e] __do_sys_finit_module+0x110/0x1b0\\n    [\u003cffffffff83c4d505\u003e] do_syscall_64+0x35/0x80\\n    [\u003cffffffff83e0006a\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0\\n\\n(vdpa_sim_blk)\\nunreferenced object 0xffff8881070c1250 (size 16):\\n  comm \\\"modprobe\\\", pid 6844, jiffies 4364069319 (age 17.572s)\\n  hex dump (first 16 bytes):\\n    76 64 70 61 73 69 6d 5f 62 6c 6b 00 6b 6b 6b a5  vdpasim_blk.kkk.\\n  backtrace:\\n    [\u003cffffffff8174f19e\u003e] __kmalloc_node_track_caller+0x4e/0x150\\n    [\u003cffffffff81731d53\u003e] kstrdup+0x33/0x60\\n    [\u003cffffffff83a5d421\u003e] kobject_set_name_vargs+0x41/0x110\\n    [\u003cffffffff82d87aab\u003e] dev_set_name+0xab/0xe0\\n    [\u003cffffffff82d91a23\u003e] device_add+0xe3/0x1a80\\n    [\u003cffffffffa0220013\u003e] 0xffffffffa0220013\\n    [\u003cffffffff81001c27\u003e] do_one_initcall+0x87/0x2e0\\n    [\u003cffffffff813739cb\u003e] do_init_module+0x1ab/0x640\\n    [\u003cffffffff81379d20\u003e] load_module+0x5d00/0x77f0\\n    [\u003cffffffff8137bc40\u003e] __do_sys_finit_module+0x110/0x1b0\\n    [\u003cffffffff83c4d505\u003e] do_syscall_64+0x35/0x80\\n    [\u003cffffffff83e0006a\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/337c24d817e28dd454ca22f1063dfad20822426e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/586e6fd7d581f987f7d0d2592edf0b26397e783e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5be953e353fe421f2983e1fd37f07fba97edbffc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aeca7ff254843d49a8739f07f7dab1341450111d\",\"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 patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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