CVE-2025-68762 (GCVE-0-2025-68762)

Vulnerability from cvelistv5 – Published: 2026-01-05 09:32 – Updated: 2026-01-05 09:32
VLAI?
Title
net: netpoll: initialize work queue before error checks
Summary
In the Linux kernel, the following vulnerability has been resolved: net: netpoll: initialize work queue before error checks Prevent a kernel warning when netconsole setup fails on devices with IFF_DISABLE_NETPOLL flag. The warning (at kernel/workqueue.c:4242 in __flush_work) occurs because the cleanup path tries to cancel an uninitialized work queue. When __netpoll_setup() encounters a device with IFF_DISABLE_NETPOLL, it fails early and calls skb_pool_flush() for cleanup. This function calls cancel_work_sync(&np->refill_wq), but refill_wq hasn't been initialized yet, triggering the warning. Move INIT_WORK() to the beginning of __netpoll_setup(), ensuring the work queue is properly initialized before any potential failure points. This allows the cleanup path to safely cancel the work queue regardless of where the setup fails.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 248f6571fd4c51531f7f8f07f186f7ae98a50afc , < a90d0dc38a10347078cca60e7495ad0648838f18 (git)
Affected: 248f6571fd4c51531f7f8f07f186f7ae98a50afc , < 760bc6ceda8e2c273c0e2018ad2595967c3dd308 (git)
Affected: 248f6571fd4c51531f7f8f07f186f7ae98a50afc , < e5235eb6cfe02a51256013a78f7b28779a7740d5 (git)
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    Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.17.13 , ≤ 6.17.* (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc1 , ≤ * (original_commit_for_fix)
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          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: netpoll: initialize work queue before error checks\n\nPrevent a kernel warning when netconsole setup fails on devices with\nIFF_DISABLE_NETPOLL flag. The warning (at kernel/workqueue.c:4242 in\n__flush_work) occurs because the cleanup path tries to cancel an\nuninitialized work queue.\n\nWhen __netpoll_setup() encounters a device with IFF_DISABLE_NETPOLL,\nit fails early and calls skb_pool_flush() for cleanup. This function\ncalls cancel_work_sync(\u0026np-\u003erefill_wq), but refill_wq hasn\u0027t been\ninitialized yet, triggering the warning.\n\nMove INIT_WORK() to the beginning of __netpoll_setup(), ensuring the\nwork queue is properly initialized before any potential failure points.\nThis allows the cleanup path to safely cancel the work queue regardless\nof where the setup fails."
        }
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        "dateUpdated": "2026-01-05T09:32:34.743Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
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    "cveId": "CVE-2025-68762",
    "datePublished": "2026-01-05T09:32:34.743Z",
    "dateReserved": "2025-12-24T10:30:51.034Z",
    "dateUpdated": "2026-01-05T09:32:34.743Z",
    "state": "PUBLISHED"
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}


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