7.8

CVE-2026-43276

net: mana: Fix double destroy_workqueue on service rescan PCI path

In 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]  <TASK>
[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]  </TASK>
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.16 < 6.18.16
Linux ≫ Linux Kernel Version >= 6.19 < 6.19.6
Linux ≫ Linux Kernel Version7.0 Updaterc1
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.12% 0.02
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-415 Double Free

The product calls free() twice on the same memory address.

https://git.kernel.org/stable/c/fa3c2f8d9152344a478abb847081c1b5f84a94f5
Patch
https://git.kernel.org/stable/c/a9a7c3203fdc4d4a8d8a7a3b1ed05d2bb4c6e77e
Patch
https://git.kernel.org/stable/c/f975a0955276579e2176a134366ed586071c7c6a
Patch