GHSA-HV6M-Q2M2-VXVR
Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-08 21:31In the Linux kernel, the following vulnerability has been resolved:
net: mana: Fix double destroy_workqueue on service rescan PCI path
While testing corner cases in the driver, a use-after-free crash was found on the service rescan PCI path.
When mana_serv_reset() calls mana_gd_suspend(), mana_gd_cleanup() destroys gc->service_wq. If the subsequent mana_gd_resume() fails with -ETIMEDOUT or -EPROTO, the code falls through to mana_serv_rescan() which triggers pci_stop_and_remove_bus_device(). This invokes the PCI .remove callback (mana_gd_remove), which calls mana_gd_cleanup() a second time, attempting to destroy the already- freed workqueue. Fix this by NULL-checking gc->service_wq in mana_gd_cleanup() and setting it to NULL after destruction.
Call stack of issue for reference: [Sat Feb 21 18:53:48 2026] Call Trace: [Sat Feb 21 18:53:48 2026] [Sat Feb 21 18:53:48 2026] mana_gd_cleanup+0x33/0x70 [mana] [Sat Feb 21 18:53:48 2026] mana_gd_remove+0x3a/0xc0 [mana] [Sat Feb 21 18:53:48 2026] pci_device_remove+0x41/0xb0 [Sat Feb 21 18:53:48 2026] device_remove+0x46/0x70 [Sat Feb 21 18:53:48 2026] device_release_driver_internal+0x1e3/0x250 [Sat Feb 21 18:53:48 2026] device_release_driver+0x12/0x20 [Sat Feb 21 18:53:48 2026] pci_stop_bus_device+0x6a/0x90 [Sat Feb 21 18:53:48 2026] pci_stop_and_remove_bus_device+0x13/0x30 [Sat Feb 21 18:53:48 2026] mana_do_service+0x180/0x290 [mana] [Sat Feb 21 18:53:48 2026] mana_serv_func+0x24/0x50 [mana] [Sat Feb 21 18:53:48 2026] process_one_work+0x190/0x3d0 [Sat Feb 21 18:53:48 2026] worker_thread+0x16e/0x2e0 [Sat Feb 21 18:53:48 2026] kthread+0xf7/0x130 [Sat Feb 21 18:53:48 2026] ? __pfx_worker_thread+0x10/0x10 [Sat Feb 21 18:53:48 2026] ? __pfx_kthread+0x10/0x10 [Sat Feb 21 18:53:48 2026] ret_from_fork+0x269/0x350 [Sat Feb 21 18:53:48 2026] ? __pfx_kthread+0x10/0x10 [Sat Feb 21 18:53:48 2026] ret_from_fork_asm+0x1a/0x30 [Sat Feb 21 18:53:48 2026]
{
"affected": [],
"aliases": [
"CVE-2026-43276"
],
"database_specific": {
"cwe_ids": [
"CWE-415"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-06T12:16:48Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Fix double destroy_workqueue on service rescan PCI path\n\nWhile testing corner cases in the driver, a use-after-free crash\nwas found on the service rescan PCI path.\n\nWhen mana_serv_reset() calls mana_gd_suspend(), mana_gd_cleanup()\ndestroys gc-\u003eservice_wq. If the subsequent mana_gd_resume() fails\nwith -ETIMEDOUT or -EPROTO, the code falls through to\nmana_serv_rescan() which triggers pci_stop_and_remove_bus_device().\nThis invokes the PCI .remove callback (mana_gd_remove), which calls\nmana_gd_cleanup() a second time, attempting to destroy the already-\nfreed workqueue. Fix this by NULL-checking gc-\u003eservice_wq in\nmana_gd_cleanup() and setting it to NULL after destruction.\n\nCall stack of issue for reference:\n[Sat Feb 21 18:53:48 2026] Call Trace:\n[Sat Feb 21 18:53:48 2026] \u003cTASK\u003e\n[Sat Feb 21 18:53:48 2026] mana_gd_cleanup+0x33/0x70 [mana]\n[Sat Feb 21 18:53:48 2026] mana_gd_remove+0x3a/0xc0 [mana]\n[Sat Feb 21 18:53:48 2026] pci_device_remove+0x41/0xb0\n[Sat Feb 21 18:53:48 2026] device_remove+0x46/0x70\n[Sat Feb 21 18:53:48 2026] device_release_driver_internal+0x1e3/0x250\n[Sat Feb 21 18:53:48 2026] device_release_driver+0x12/0x20\n[Sat Feb 21 18:53:48 2026] pci_stop_bus_device+0x6a/0x90\n[Sat Feb 21 18:53:48 2026] pci_stop_and_remove_bus_device+0x13/0x30\n[Sat Feb 21 18:53:48 2026] mana_do_service+0x180/0x290 [mana]\n[Sat Feb 21 18:53:48 2026] mana_serv_func+0x24/0x50 [mana]\n[Sat Feb 21 18:53:48 2026] process_one_work+0x190/0x3d0\n[Sat Feb 21 18:53:48 2026] worker_thread+0x16e/0x2e0\n[Sat Feb 21 18:53:48 2026] kthread+0xf7/0x130\n[Sat Feb 21 18:53:48 2026] ? __pfx_worker_thread+0x10/0x10\n[Sat Feb 21 18:53:48 2026] ? __pfx_kthread+0x10/0x10\n[Sat Feb 21 18:53:48 2026] ret_from_fork+0x269/0x350\n[Sat Feb 21 18:53:48 2026] ? __pfx_kthread+0x10/0x10\n[Sat Feb 21 18:53:48 2026] ret_from_fork_asm+0x1a/0x30\n[Sat Feb 21 18:53:48 2026] \u003c/TASK\u003e",
"id": "GHSA-hv6m-q2m2-vxvr",
"modified": "2026-05-08T21:31:21Z",
"published": "2026-05-06T12:30:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43276"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a9a7c3203fdc4d4a8d8a7a3b1ed05d2bb4c6e77e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f975a0955276579e2176a134366ed586071c7c6a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fa3c2f8d9152344a478abb847081c1b5f84a94f5"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
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.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- 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.