cve-2021-47479
Vulnerability from cvelistv5
Published
2024-05-22 08:19
Modified
2024-12-19 07:43
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8712: fix use-after-free in rtl8712_dl_fw Syzbot reported use-after-free in rtl8712_dl_fw(). The problem was in race condition between r871xu_dev_remove() ->ndo_open() callback. It's easy to see from crash log, that driver accesses released firmware in ->ndo_open() callback. It may happen, since driver was releasing firmware _before_ unregistering netdev. Fix it by moving unregister_netdev() before cleaning up resources. Call Trace: ... rtl871x_open_fw drivers/staging/rtl8712/hal_init.c:83 [inline] rtl8712_dl_fw+0xd95/0xe10 drivers/staging/rtl8712/hal_init.c:170 rtl8712_hal_init drivers/staging/rtl8712/hal_init.c:330 [inline] rtl871x_hal_init+0xae/0x180 drivers/staging/rtl8712/hal_init.c:394 netdev_open+0xe6/0x6c0 drivers/staging/rtl8712/os_intfs.c:380 __dev_open+0x2bc/0x4d0 net/core/dev.c:1484 Freed by task 1306: ... release_firmware+0x1b/0x30 drivers/base/firmware_loader/main.c:1053 r871xu_dev_remove+0xcc/0x2c0 drivers/staging/rtl8712/usb_intf.c:599 usb_unbind_interface+0x1d8/0x8d0 drivers/usb/core/driver.c:458
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a65c9afe9f2f55b7a7fb4a25ab654cd4139683a4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/befd23bd3b17f1a3f9c943a8580b47444c7c63ed
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c052cc1a069c3e575619cf64ec427eb41176ca70
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c430094541a80575259a94ff879063ef01473506
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a65c9afe9f2f55b7a7fb4a25ab654cd4139683a4
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/befd23bd3b17f1a3f9c943a8580b47444c7c63ed
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c052cc1a069c3e575619cf64ec427eb41176ca70
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c430094541a80575259a94ff879063ef01473506
Impacted products
Vendor Product Version
Linux Linux Version: 3.3
Show details on NVD website

To clipboard 

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}


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