CVE-2022-50299 (GCVE-0-2022-50299)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:45 – Updated: 2025-09-15 14:45
VLAI?
Title
md: Replace snprintf with scnprintf
Summary
In the Linux kernel, the following vulnerability has been resolved: md: Replace snprintf with scnprintf Current code produces a warning as shown below when total characters in the constituent block device names plus the slashes exceeds 200. snprintf() returns the number of characters generated from the given input, which could cause the expression “200 – len” to wrap around to a large positive number. Fix this by using scnprintf() instead, which returns the actual number of characters written into the buffer. [ 1513.267938] ------------[ cut here ]------------ [ 1513.267943] WARNING: CPU: 15 PID: 37247 at <snip>/lib/vsprintf.c:2509 vsnprintf+0x2c8/0x510 [ 1513.267944] Modules linked in: <snip> [ 1513.267969] CPU: 15 PID: 37247 Comm: mdadm Not tainted 5.4.0-1085-azure #90~18.04.1-Ubuntu [ 1513.267969] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022 [ 1513.267971] RIP: 0010:vsnprintf+0x2c8/0x510 <-snip-> [ 1513.267982] Call Trace: [ 1513.267986] snprintf+0x45/0x70 [ 1513.267990] ? disk_name+0x71/0xa0 [ 1513.267993] dump_zones+0x114/0x240 [raid0] [ 1513.267996] ? _cond_resched+0x19/0x40 [ 1513.267998] raid0_run+0x19e/0x270 [raid0] [ 1513.268000] md_run+0x5e0/0xc50 [ 1513.268003] ? security_capable+0x3f/0x60 [ 1513.268005] do_md_run+0x19/0x110 [ 1513.268006] md_ioctl+0x195e/0x1f90 [ 1513.268007] blkdev_ioctl+0x91f/0x9f0 [ 1513.268010] block_ioctl+0x3d/0x50 [ 1513.268012] do_vfs_ioctl+0xa9/0x640 [ 1513.268014] ? __fput+0x162/0x260 [ 1513.268016] ksys_ioctl+0x75/0x80 [ 1513.268017] __x64_sys_ioctl+0x1a/0x20 [ 1513.268019] do_syscall_64+0x5e/0x200 [ 1513.268021] entry_SYSCALL_64_after_hwframe+0x44/0xa9
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 766038846e875740cf4c20dfc5d5b292ba47360a , < 3b0a2bd51f60418ecd67493586a2bb2174199de3 (git)
Affected: 766038846e875740cf4c20dfc5d5b292ba47360a , < 897b1450abe5a67c842a5d24173ce4449ccdfa94 (git)
Affected: 766038846e875740cf4c20dfc5d5b292ba47360a , < 97238b88583c27c9d3b4a0cedb45f816523f17c3 (git)
Affected: 766038846e875740cf4c20dfc5d5b292ba47360a , < 76694e9ce0b2238c0a5f3ba54f9361dd3770ec78 (git)
Affected: 766038846e875740cf4c20dfc5d5b292ba47360a , < 5d8259c9d1915a50c60c7d6e9e7fb9b7da64a175 (git)
Affected: 766038846e875740cf4c20dfc5d5b292ba47360a , < 41ca95033a0c47cd6dace1f0a36a6eb5ebe799e6 (git)
Affected: 766038846e875740cf4c20dfc5d5b292ba47360a , < f95825c4e51cf9a653b0ef947ac78401fc9d3a40 (git)
Affected: 766038846e875740cf4c20dfc5d5b292ba47360a , < 1727fd5015d8f93474148f94e34cda5aa6ad4a43 (git)
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    Linux Linux Affected: 4.10
Unaffected: 0 , < 4.10 (semver)
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/md/raid0.c"
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              "status": "unaffected",
              "version": "0",
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              "version": "4.14.296",
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              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.262",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.220",
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              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.150",
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            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
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              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd: Replace snprintf with scnprintf\n\nCurrent code produces a warning as shown below when total characters\nin the constituent block device names plus the slashes exceeds 200.\nsnprintf() returns the number of characters generated from the given\ninput, which could cause the expression \u201c200 \u2013 len\u201d to wrap around\nto a large positive number. Fix this by using scnprintf() instead,\nwhich returns the actual number of characters written into the buffer.\n\n[ 1513.267938] ------------[ cut here ]------------\n[ 1513.267943] WARNING: CPU: 15 PID: 37247 at \u003csnip\u003e/lib/vsprintf.c:2509 vsnprintf+0x2c8/0x510\n[ 1513.267944] Modules linked in:  \u003csnip\u003e\n[ 1513.267969] CPU: 15 PID: 37247 Comm: mdadm Not tainted 5.4.0-1085-azure #90~18.04.1-Ubuntu\n[ 1513.267969] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022\n[ 1513.267971] RIP: 0010:vsnprintf+0x2c8/0x510\n\u003c-snip-\u003e\n[ 1513.267982] Call Trace:\n[ 1513.267986]  snprintf+0x45/0x70\n[ 1513.267990]  ? disk_name+0x71/0xa0\n[ 1513.267993]  dump_zones+0x114/0x240 [raid0]\n[ 1513.267996]  ? _cond_resched+0x19/0x40\n[ 1513.267998]  raid0_run+0x19e/0x270 [raid0]\n[ 1513.268000]  md_run+0x5e0/0xc50\n[ 1513.268003]  ? security_capable+0x3f/0x60\n[ 1513.268005]  do_md_run+0x19/0x110\n[ 1513.268006]  md_ioctl+0x195e/0x1f90\n[ 1513.268007]  blkdev_ioctl+0x91f/0x9f0\n[ 1513.268010]  block_ioctl+0x3d/0x50\n[ 1513.268012]  do_vfs_ioctl+0xa9/0x640\n[ 1513.268014]  ? __fput+0x162/0x260\n[ 1513.268016]  ksys_ioctl+0x75/0x80\n[ 1513.268017]  __x64_sys_ioctl+0x1a/0x20\n[ 1513.268019]  do_syscall_64+0x5e/0x200\n[ 1513.268021]  entry_SYSCALL_64_after_hwframe+0x44/0xa9"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-15T14:45:55.071Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3b0a2bd51f60418ecd67493586a2bb2174199de3"
        },
        {
          "url": "https://git.kernel.org/stable/c/897b1450abe5a67c842a5d24173ce4449ccdfa94"
        },
        {
          "url": "https://git.kernel.org/stable/c/97238b88583c27c9d3b4a0cedb45f816523f17c3"
        },
        {
          "url": "https://git.kernel.org/stable/c/76694e9ce0b2238c0a5f3ba54f9361dd3770ec78"
        },
        {
          "url": "https://git.kernel.org/stable/c/5d8259c9d1915a50c60c7d6e9e7fb9b7da64a175"
        },
        {
          "url": "https://git.kernel.org/stable/c/41ca95033a0c47cd6dace1f0a36a6eb5ebe799e6"
        },
        {
          "url": "https://git.kernel.org/stable/c/f95825c4e51cf9a653b0ef947ac78401fc9d3a40"
        },
        {
          "url": "https://git.kernel.org/stable/c/1727fd5015d8f93474148f94e34cda5aa6ad4a43"
        }
      ],
      "title": "md: Replace snprintf with scnprintf",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50299",
    "datePublished": "2025-09-15T14:45:55.071Z",
    "dateReserved": "2025-09-15T14:18:36.812Z",
    "dateUpdated": "2025-09-15T14:45:55.071Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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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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