CVE-2026-45962 (GCVE-0-2026-45962)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:18 – Updated: 2026-05-27 12:18
VLAI
Title
ublk: Validate SQE128 flag before accessing the cmd
Summary
In the Linux kernel, the following vulnerability has been resolved: ublk: Validate SQE128 flag before accessing the cmd ublk_ctrl_cmd_dump() accesses (header *)sqe->cmd before IO_URING_F_SQE128 flag check. This could cause out of boundary memory access. Move the SQE128 flag check earlier in ublk_ctrl_uring_cmd() to return -EINVAL immediately if the flag is not set.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 71f28f3136aff5890cd56de78abc673f8393cad9 , < 4b4dff498f46e9802f71bc84258bf73065f51c6a (git)
Affected: 71f28f3136aff5890cd56de78abc673f8393cad9 , < 31cac6acf77ece488f29fb8f79589d9298e969c8 (git)
Affected: 71f28f3136aff5890cd56de78abc673f8393cad9 , < dbe8e81a2ec608f87f79a34f6444cd62f6a243bb (git)
Affected: 71f28f3136aff5890cd56de78abc673f8393cad9 , < f75a5555e0049e7857eae25b60aee98b80e287ec (git)
Affected: 71f28f3136aff5890cd56de78abc673f8393cad9 , < 17d33ba7291100008360b5a354962db37ad80684 (git)
Affected: 71f28f3136aff5890cd56de78abc673f8393cad9 , < da7e4b75e50c087d2031a92f6646eb90f7045a67 (git)
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Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.14 , ≤ 6.18.* (semver)
Unaffected: 6.19.4 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "drivers/block/ublk_drv.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nublk: Validate SQE128 flag before accessing the cmd\n\nublk_ctrl_cmd_dump() accesses (header *)sqe-\u003ecmd before\nIO_URING_F_SQE128 flag check. This could cause out of boundary memory\naccess.\n\nMove the SQE128 flag check earlier in ublk_ctrl_uring_cmd() to return\n-EINVAL immediately if the flag is not set."
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      "providerMetadata": {
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    "dateReserved": "2026-05-13T15:03:33.089Z",
    "dateUpdated": "2026-05-27T12:18:19.070Z",
    "state": "PUBLISHED"
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • 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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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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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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