- Vulnerability/
- CVE-2022-49925
CVE-2022-49925: RDMA/core: Fix null-ptr-deref in ib_core_cleanup()
First published: Thu May 01 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Fix null-ptr-deref in ib_core_cleanup() KASAN reported a null-ptr-deref error: KASAN: null-ptr-deref in range [0x0000000000000118-0x000000000000011f] CPU: 1 PID: 379 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:destroy_workqueue+0x2f/0x740 RSP: 0018:ffff888016137df8 EFLAGS: 00000202 ... Call Trace: ib_core_cleanup+0xa/0xa1 [ib_core] __do_sys_delete_module.constprop.0+0x34f/0x5b0 do_syscall_64+0x3a/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa1a0d221b7 ... It is because the fail of roce_gid_mgmt_init() is ignored: ib_core_init() roce_gid_mgmt_init() gid_cache_wq = alloc_ordered_workqueue # fail ... ib_core_cleanup() roce_gid_mgmt_cleanup() destroy_workqueue(gid_cache_wq) # destroy an unallocated wq Fix this by catching the fail of roce_gid_mgmt_init() in ib_core_init().
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel |
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Reference Links
- https://git.kernel.org/stable/c/af8fb5a0600e9ae29950e9422a032c3c22649ee5
- https://git.kernel.org/stable/c/d360e875c011a005628525bf290322058927e7dc
- https://git.kernel.org/stable/c/6b3d5dcb12347f3518308c2c9d2cf72453a3e1e5
- https://git.kernel.org/stable/c/ab817f75e5e0fa58d9be0825da6a7b7d8a1fa1d9
- https://git.kernel.org/stable/c/07c0d131cc0fe1f3981a42958fc52d573d303d89
Frequently Asked Questions
What is the severity of CVE-2022-49925?
CVE-2022-49925 is classified as a medium severity vulnerability in the Linux kernel.
What impact does CVE-2022-49925 have on systems running affected versions of the Linux kernel?
CVE-2022-49925 can lead to a null pointer dereference, potentially causing system crashes or instability.
How do I fix CVE-2022-49925?
To fix CVE-2022-49925, upgrade to the latest version of the Linux kernel that includes the patch addressing this vulnerability.
Which versions of the Linux kernel are affected by CVE-2022-49925?
CVE-2022-49925 affects multiple versions of the Linux kernel before the patch was applied.
Is there a workaround for CVE-2022-49925 if I cannot immediately upgrade my Linux kernel?
Currently, there are no known effective workarounds for CVE-2022-49925; upgrading is recommended.
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