Linux Kernel: DAF on null service_wq in mana module (CVE-2026-43440)
CVE-2026-43440 Published on May 8, 2026
net/mana: Null service_wq on setup error to prevent double destroy
In the Linux kernel, the following vulnerability has been resolved:
net/mana: Null service_wq on setup error to prevent double destroy
In mana_gd_setup() error path, set gc->service_wq to NULL after
destroy_workqueue() to match the cleanup in mana_gd_cleanup().
This prevents a use-after-free if the workqueue pointer is checked
after a failed setup.
Products Associated with CVE-2026-43440
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Affected Versions
Linux:- Version fa3c2f8d9152344a478abb847081c1b5f84a94f5 and below 59489ce60d7412ed82fb1d8002faa3102dcd4916 is affected.
- Version a9a7c3203fdc4d4a8d8a7a3b1ed05d2bb4c6e77e and below 6c92392602b451e3869f15ab685f8f650e942b13 is affected.
- Version f975a0955276579e2176a134366ed586071c7c6a and below 87c2302813abc55c46485711a678e3c312b00666 is affected.
- Version 6.18.16 and below 6.18.19 is affected.
- Version 6.19.6 and below 6.19.9 is affected.