CVE-2026-43447 (GCVE-0-2026-43447)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:22 – Updated: 2026-05-08 14:22
VLAI?
Title
iavf: fix PTP use-after-free during reset
Summary
In the Linux kernel, the following vulnerability has been resolved: iavf: fix PTP use-after-free during reset Commit 7c01dbfc8a1c5f ("iavf: periodically cache PHC time") introduced a worker to cache PHC time, but failed to stop it during reset or disable. This creates a race condition where `iavf_reset_task()` or `iavf_disable_vf()` free adapter resources (AQ) while the worker is still running. If the worker triggers `iavf_queue_ptp_cmd()` during teardown, it accesses freed memory/locks, leading to a crash. Fix this by calling `iavf_ptp_release()` before tearing down the adapter. This ensures `ptp_clock_unregister()` synchronously cancels the worker and cleans up the chardev before the backing resources are destroyed.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7c01dbfc8a1c5f8b8e4a7907ab06db1449d478d0 , < 1b034f2429ce6b45ce74dc266175d277acafc5c4 (git)
Affected: 7c01dbfc8a1c5f8b8e4a7907ab06db1449d478d0 , < 90cc8b2add29b57288025b51c70bc647e7cccb12 (git)
Affected: 7c01dbfc8a1c5f8b8e4a7907ab06db1449d478d0 , < efc54fb13d79117a825fef17364315a58682c7ec (git)
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    Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.18.19 , ≤ 6.18.* (semver)
Unaffected: 6.19.9 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niavf: fix PTP use-after-free during reset\n\nCommit 7c01dbfc8a1c5f (\"iavf: periodically cache PHC time\") introduced a\nworker to cache PHC time, but failed to stop it during reset or disable.\n\nThis creates a race condition where `iavf_reset_task()` or\n`iavf_disable_vf()` free adapter resources (AQ) while the worker is still\nrunning. If the worker triggers `iavf_queue_ptp_cmd()` during teardown, it\naccesses freed memory/locks, leading to a crash.\n\nFix this by calling `iavf_ptp_release()` before tearing down the adapter.\nThis ensures `ptp_clock_unregister()` synchronously cancels the worker and\ncleans up the chardev before the backing resources are destroyed."
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    "dateReserved": "2026-05-01T14:12:56.010Z",
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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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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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