Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Remove improper idxd_free The call to idxd_free() introduces a duplicate put_device() leading to a reference count underflow: refcount_t: underflow; use-after-free. WARNING: CPU: 15 PID: 4428 at lib/refcount.c:28 refcount_warn_saturate+0xbe/0x110 ... Call Trace: <TASK> idxd_remove+0xe4/0x120 [idxd] pci_device_remove+0x3f/0xb0 device_release_driver_internal+0x197/0x200 driver_detach+0x48/0x90 bus_remove_driver+0x74/0xf0 pci_unregister_driver+0x2e/0xb0 idxd_exit_module+0x34/0x7a0 [idxd] __do_sys_delete_module.constprop.0+0x183/0x280 do_syscall_64+0x54/0xd70 entry_SYSCALL_64_after_hwframe+0x76/0x7e The idxd_unregister_devices() which is invoked at the very beginning of idxd_remove(), already takes care of the necessary put_device() through the following call path: idxd_unregister_devices() -> device_unregister() -> put_device() In addition, when CONFIG_DEBUG_KOBJECT_RELEASE is enabled, put_device() may trigger asynchronous cleanup via schedule_delayed_work(). If idxd_free() is called immediately after, it can result in a use-after-free. Remove the improper idxd_free() to avoid both the refcount underflow and potential memory corruption during module unload.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 68ac5a01f635b3791196fd1c39bc48497252c36f before 24414bbcb37e1af95190af36c21ae51d497e1a9e; affected d2d05fd0fc95c4defed6f7b87550e20e8baa1d97 before 0e95ee7f532b21206fe3f1c4054002b0d21e3b9c; affected 21f9f5cd9a0c75084d4369ba0b8c4f695c41dea7 before dd7a7e43269711d757fc260b0bbdf7138f75de11; affected d5449ff1b04dfe9ed8e455769aa01e4c2ccf6805 before da4fbc1488a4cec6748da685181ee4449a878dac; affected d5449ff1b04dfe9ed8e455769aa01e4c2ccf6805 before f41c538881eec4dcf5961a242097d447f848cda6; affected 2b7a961cea0e5b65afda911f76d14fec5c98d024; affected 6.1.140 before 6.1.160; affected 6.6.92 before 6.6.107; affected 6.12.30 before 6.12.48; affected 6.14.8 before 6.15 |
| Linux / Linux | affected 6.15; unaffected 0 before 6.15; unaffected 6.1.160 through 6.1.*; unaffected 6.6.107 through 6.6.*; unaffected 6.12.48 through 6.12.*; unaffected 6.16.8 through 6.16.*; unaffected 6.17 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/24414bbcb37e1af95190af36c21ae51d497e1a9e
- https://git.kernel.org/stable/c/0e95ee7f532b21206fe3f1c4054002b0d21e3b9c
- https://git.kernel.org/stable/c/dd7a7e43269711d757fc260b0bbdf7138f75de11
- https://git.kernel.org/stable/c/da4fbc1488a4cec6748da685181ee4449a878dac
- https://git.kernel.org/stable/c/f41c538881eec4dcf5961a242097d447f848cda6
ADP enrichment
No English description supplied.