CVE-2025-38530 (GCVE-0-2025-38530)
Vulnerability from cvelistv5
Published
2025-08-16 11:12
Modified
2025-08-16 11:12
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: comedi: pcl812: Fix bit shift out of bounds When checking for a supported IRQ number, the following test is used: if ((1 << it->options[1]) & board->irq_bits) { However, `it->options[i]` is an unchecked `int` value from userspace, so the shift amount could be negative or out of bounds. Fix the test by requiring `it->options[1]` to be within bounds before proceeding with the original test. Valid `it->options[1]` values that select the IRQ will be in the range [1,15]. The value 0 explicitly disables the use of interrupts.
References
Impacted products
Vendor Product Version
Linux Linux Version: fcdb427bc7cf5e9e5d7280cf09c08dec49b49432
Version: fcdb427bc7cf5e9e5d7280cf09c08dec49b49432
Version: fcdb427bc7cf5e9e5d7280cf09c08dec49b49432
Version: fcdb427bc7cf5e9e5d7280cf09c08dec49b49432
Version: fcdb427bc7cf5e9e5d7280cf09c08dec49b49432
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{
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          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: pcl812: Fix bit shift out of bounds\n\nWhen checking for a supported IRQ number, the following test is used:\n\n\tif ((1 \u003c\u003c it-\u003eoptions[1]) \u0026 board-\u003eirq_bits) {\n\nHowever, `it-\u003eoptions[i]` is an unchecked `int` value from userspace, so\nthe shift amount could be negative or out of bounds.  Fix the test by\nrequiring `it-\u003eoptions[1]` to be within bounds before proceeding with\nthe original test.  Valid `it-\u003eoptions[1]` values that select the IRQ\nwill be in the range [1,15]. The value 0 explicitly disables the use of\ninterrupts."
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      "providerMetadata": {
        "dateUpdated": "2025-08-16T11:12:23.368Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/b14b076ce593f72585412fc7fd3747e03a5e3632"
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      "title": "comedi: pcl812: Fix bit shift out of bounds",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38530",
    "datePublished": "2025-08-16T11:12:23.368Z",
    "dateReserved": "2025-04-16T04:51:24.023Z",
    "dateUpdated": "2025-08-16T11:12:23.368Z",
    "state": "PUBLISHED"
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}


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