CVE-2024-50236: wifi: ath10k: Fix memory leak in management tx
First published: Sat Nov 09 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: wifi: ath10k: Fix memory leak in management tx In the current logic, memory is allocated for storing the MSDU context during management packet TX but this memory is not being freed during management TX completion. Similar leaks are seen in the management TX cleanup logic. Kmemleak reports this problem as below, unreferenced object 0xffffff80b64ed250 (size 16): comm "kworker/u16:7", pid 148, jiffies 4294687130 (age 714.199s) hex dump (first 16 bytes): 00 2b d8 d8 80 ff ff ff c4 74 e9 fd 07 00 00 00 .+.......t...... backtrace: [<ffffffe6e7b245dc>] __kmem_cache_alloc_node+0x1e4/0x2d8 [<ffffffe6e7adde88>] kmalloc_trace+0x48/0x110 [<ffffffe6bbd765fc>] ath10k_wmi_tlv_op_gen_mgmt_tx_send+0xd4/0x1d8 [ath10k_core] [<ffffffe6bbd3eed4>] ath10k_mgmt_over_wmi_tx_work+0x134/0x298 [ath10k_core] [<ffffffe6e78d5974>] process_scheduled_works+0x1ac/0x400 [<ffffffe6e78d60b8>] worker_thread+0x208/0x328 [<ffffffe6e78dc890>] kthread+0x100/0x1c0 [<ffffffe6e78166c0>] ret_from_fork+0x10/0x20 Free the memory during completion and cleanup to fix the leak. Protect the mgmt_pending_tx idr_remove() operation in ath10k_wmi_tlv_op_cleanup_mgmt_tx_send() using ar->data_lock similar to other instances. Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.2.0-01387-QCAHLSWMTPLZ-1
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=4.19<4.19.323 | |
| Linux Kernel | >=4.20<5.4.285 | |
| Linux Kernel | >=5.5<5.10.229 | |
| Linux Kernel | >=5.11<5.15.171 | |
| Linux Kernel | >=5.16<6.1.116 | |
| Linux Kernel | >=6.2<6.6.60 | |
| Linux Kernel | >=6.7<6.11.7 | |
| Linux Kernel | =6.12-rc1 | |
| Linux Kernel | =6.12-rc2 | |
| Linux Kernel | =6.12-rc3 | |
| Linux Kernel | =6.12-rc4 | |
| Linux Kernel | =6.12-rc5 | |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 |
| debian/linux-6.1 | 6.1.119-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/eff818238bedb9c2484c251ec46f9f160911cdc0
- https://git.kernel.org/stable/c/6fc9af3df6ca7f3c94774d20f62dc7b49616026d
- https://git.kernel.org/stable/c/4112450da7d67b59ccedc2208bae622db17dbcb8
- https://git.kernel.org/stable/c/705be2dc45c7f852e211e16bc41a916fab741983
- https://git.kernel.org/stable/c/6cc23898e6ba47e976050d3c080b4d2c1add3748
- https://git.kernel.org/stable/c/5f5a939759c79e7385946c85e62feca51a18d816
- https://git.kernel.org/stable/c/2f6f1e26ac6d2b38e2198a71f81f0ade14d6b07b
- https://git.kernel.org/stable/c/e15d84b3bba187aa372dff7c58ce1fd5cb48a076
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-50236
- https://nvd.nist.gov/vuln/detail/CVE-2024-50236
- https://launchpad.net/bugs/cve/CVE-2024-50236
- https://security-tracker.debian.org/tracker/CVE-2024-50236
- https://ubuntu.com/security/CVE-2024-50236
- https://git.kernel.org/linus/e15d84b3bba187aa372dff7c58ce1fd5cb48a076
Frequently Asked Questions
What is the severity of CVE-2024-50236?
The severity of CVE-2024-50236 is not explicitly rated, but it involves a memory leak in the Linux kernel's ath10k driver.
How do I fix CVE-2024-50236?
To fix CVE-2024-50236, you should update the Linux kernel to a version that includes the patch addressing the memory leak.
What versions of the Linux kernel are affected by CVE-2024-50236?
CVE-2024-50236 affects multiple versions of the Linux kernel, specifically those between 4.19.x and 6.12.x.
Is CVE-2024-50236 exploitable?
CVE-2024-50236 mainly results in a memory leak rather than direct exploitation potential, though it can lead to resource exhaustion.
What impact does CVE-2024-50236 have on system performance?
The memory leak caused by CVE-2024-50236 can lead to increased memory usage over time, potentially degrading system performance.
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