GHSA-27W7-X5WJ-42P8
Vulnerability from github – Published: 2026-06-24 18:32 – Updated: 2026-06-24 18:32In the Linux kernel, the following vulnerability has been resolved:
wifi: mt76: mt7996: fix use-after-free bugs in mt7996_mac_dump_work()
When the mt7996 pci chip is detaching, the mt7996_crash_data is released in mt7996_coredump_unregister(). However, the work item dump_work may still be running or pending, leading to UAF bugs when the already freed crash_data is dereferenced again in mt7996_mac_dump_work().
The race condition can occur as follows:
CPU 0 (removal path) | CPU 1 (workqueue) mt7996_pci_remove() | mt7996_sys_recovery_set() mt7996_unregister_device() | mt7996_reset() mt7996_coredump_unregister() | queue_work() vfree(dev->coredump.crash_data) | mt7996_mac_dump_work() | crash_data-> // UAF
Fix this by ensuring dump_work is properly canceled before the crash_data is deallocated. Add cancel_work_sync() in mt7996_unregister_device() to synchronize with any pending or executing dump work.
{
"affected": [],
"aliases": [
"CVE-2026-53097"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-24T17:17:23Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: fix use-after-free bugs in mt7996_mac_dump_work()\n\nWhen the mt7996 pci chip is detaching, the mt7996_crash_data is\nreleased in mt7996_coredump_unregister(). However, the work item\ndump_work may still be running or pending, leading to UAF bugs\nwhen the already freed crash_data is dereferenced again in\nmt7996_mac_dump_work().\n\nThe race condition can occur as follows:\n\nCPU 0 (removal path) | CPU 1 (workqueue)\nmt7996_pci_remove() | mt7996_sys_recovery_set()\n mt7996_unregister_device() | mt7996_reset()\n mt7996_coredump_unregister() | queue_work()\n vfree(dev-\u003ecoredump.crash_data) | mt7996_mac_dump_work()\n | crash_data-\u003e // UAF\n\nFix this by ensuring dump_work is properly canceled before\nthe crash_data is deallocated. Add cancel_work_sync() in\nmt7996_unregister_device() to synchronize with any pending\nor executing dump work.",
"id": "GHSA-27w7-x5wj-42p8",
"modified": "2026-06-24T18:32:47Z",
"published": "2026-06-24T18:32:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53097"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/180182a3f23ff79430a32ca2c4c1885368ceab48"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/188e10f9ea3109d23c6b7643aa6ec2f5cb0faa6d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/aa4a31cd89f4fde5043ac613fe0e27014a60a60b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c8f62f73bbced3a79894655bdb0b625462d956fc"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.