cve-2021-47479
Vulnerability from cvelistv5
Published
2024-05-22 08:19
Modified
2024-08-04 05:39
Severity
Summary
staging: rtl8712: fix use-after-free in rtl8712_dl_fw
References
SourceURLTags
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
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
Show details on NVD website

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    "cveId": "CVE-2021-47479",
    "datePublished": "2024-05-22T08:19:32.174Z",
    "dateReserved": "2024-05-22T06:20:56.200Z",
    "dateUpdated": "2024-08-04T05:39:59.455Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47479\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-22T09:15:09.817\",\"lastModified\":\"2024-05-22T12:46:53.887\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nstaging: rtl8712: fix use-after-free in rtl8712_dl_fw\\n\\nSyzbot reported use-after-free in rtl8712_dl_fw(). The problem was in\\nrace condition between r871xu_dev_remove() -\u003endo_open() callback.\\n\\nIt\u0027s easy to see from crash log, that driver accesses released firmware\\nin -\u003endo_open() callback. It may happen, since driver was releasing\\nfirmware _before_ unregistering netdev. Fix it by moving\\nunregister_netdev() before cleaning up resources.\\n\\nCall Trace:\\n...\\n rtl871x_open_fw drivers/staging/rtl8712/hal_init.c:83 [inline]\\n rtl8712_dl_fw+0xd95/0xe10 drivers/staging/rtl8712/hal_init.c:170\\n rtl8712_hal_init drivers/staging/rtl8712/hal_init.c:330 [inline]\\n rtl871x_hal_init+0xae/0x180 drivers/staging/rtl8712/hal_init.c:394\\n netdev_open+0xe6/0x6c0 drivers/staging/rtl8712/os_intfs.c:380\\n __dev_open+0x2bc/0x4d0 net/core/dev.c:1484\\n\\nFreed by task 1306:\\n...\\n release_firmware+0x1b/0x30 drivers/base/firmware_loader/main.c:1053\\n r871xu_dev_remove+0xcc/0x2c0 drivers/staging/rtl8712/usb_intf.c:599\\n usb_unbind_interface+0x1d8/0x8d0 drivers/usb/core/driver.c:458\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: staging: rtl8712: corrige el use-after-free en rtl8712_dl_fw Syzbot inform\u00f3 el use-after-free en rtl8712_dl_fw(). El problema estaba en la condici\u00f3n de ejecuci\u00f3n entre la devoluci\u00f3n de llamada r871xu_dev_remove() -\u0026gt;ndo_open(). Es f\u00e1cil ver en el registro de fallos que el controlador accede al firmware lanzado en la devoluci\u00f3n de llamada -\u0026gt;ndo_open(). Puede suceder, ya que el controlador estaba lanzando el firmware _antes_ de cancelar el registro de netdev. Solucionarlo moviendo unregister_netdev() antes de limpiar los recursos. Traza de llamada: ... RTL871X_OPEN_FW : 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 Liberado por tarea 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\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/a65c9afe9f2f55b7a7fb4a25ab654cd4139683a4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/befd23bd3b17f1a3f9c943a8580b47444c7c63ed\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c052cc1a069c3e575619cf64ec427eb41176ca70\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c430094541a80575259a94ff879063ef01473506\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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