CVE-2022-50329 (GCVE-0-2022-50329)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:49 – Updated: 2025-09-15 14:49
VLAI?
Title
block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq
Summary
In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq Commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'") will access 'bic->bfqq' in bic_set_bfqq(), however, bfq_exit_icq_bfqq() can free bfqq first, and then call bic_set_bfqq(), which will cause uaf. Fix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a , < 1425f1bb5df5239021fd09ebc2a5e8070e705d36 (git)
Affected: 094f3d9314d67691cb21ba091c1b528f6e3c4893 , < 7949b0df3dd9f4817ed4a4e989fa9ee81df6205f (git)
Affected: b22fd72bfebda3956efc4431b60ddfc0a51e03e0 , < cfe5b38c37720313eff0dec5517442c7ab3c9a20 (git)
Affected: 761564d93c8265f65543acf0a576b32d66bfa26a , < 1ed959fef5b1c6f1a7a3fbea543698c30ebd6678 (git)
Affected: 64dc8c732f5c2b406cc752e6aaa1bd5471159cab , < 246cf66e300b76099b5dbd3fdd39e9a5dbc53f02 (git)
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    Linux Linux Affected: 5.15.86 , < 5.15.87 (semver)
Affected: 6.0.16 , < 6.0.17 (semver)
Affected: 6.1.2 , < 6.1.3 (semver)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "block/bfq-iosched.c"
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          "versions": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.87",
                  "versionStartIncluding": "5.15.86",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.17",
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq\n\nCommit 64dc8c732f5c (\"block, bfq: fix possible uaf for \u0027bfqq-\u003ebic\u0027\")\nwill access \u0027bic-\u003ebfqq\u0027 in bic_set_bfqq(), however, bfq_exit_icq_bfqq()\ncan free bfqq first, and then call bic_set_bfqq(), which will cause uaf.\n\nFix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-15T14:49:32.123Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/1425f1bb5df5239021fd09ebc2a5e8070e705d36"
        },
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          "url": "https://git.kernel.org/stable/c/7949b0df3dd9f4817ed4a4e989fa9ee81df6205f"
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        {
          "url": "https://git.kernel.org/stable/c/cfe5b38c37720313eff0dec5517442c7ab3c9a20"
        },
        {
          "url": "https://git.kernel.org/stable/c/1ed959fef5b1c6f1a7a3fbea543698c30ebd6678"
        },
        {
          "url": "https://git.kernel.org/stable/c/246cf66e300b76099b5dbd3fdd39e9a5dbc53f02"
        }
      ],
      "title": "block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50329",
    "datePublished": "2025-09-15T14:49:32.123Z",
    "dateReserved": "2025-09-15T14:18:36.815Z",
    "dateUpdated": "2025-09-15T14:49:32.123Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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