{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47479","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-22T06:20:56.200Z","datePublished":"2024-05-22T08:19:32.174Z","dateUpdated":"2025-05-04T12:41:33.897Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T12:41:33.897Z"},"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() ->ndo_open() callback.\n\nIt's easy to see from crash log, that driver accesses released firmware\nin ->ndo_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"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/staging/rtl8712/usb_intf.c"],"versions":[{"version":"8c213fa59199f9673d66970d6940fa093186642f","lessThan":"c430094541a80575259a94ff879063ef01473506","status":"affected","versionType":"git"},{"version":"8c213fa59199f9673d66970d6940fa093186642f","lessThan":"befd23bd3b17f1a3f9c943a8580b47444c7c63ed","status":"affected","versionType":"git"},{"version":"8c213fa59199f9673d66970d6940fa093186642f","lessThan":"a65c9afe9f2f55b7a7fb4a25ab654cd4139683a4","status":"affected","versionType":"git"},{"version":"8c213fa59199f9673d66970d6940fa093186642f","lessThan":"c052cc1a069c3e575619cf64ec427eb41176ca70","status":"affected","versionType":"git"},{"version":"bc5d453eab4506cb52397db8830d1070904265a4","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/staging/rtl8712/usb_intf.c"],"versions":[{"version":"3.3","status":"affected"},{"version":"0","lessThan":"3.3","status":"unaffected","versionType":"semver"},{"version":"5.10.79","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.14.18","lessThanOrEqual":"5.14.*","status":"unaffected","versionType":"semver"},{"version":"5.15.2","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"5.16","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"5.10.79"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"5.14.18"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"5.15.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"5.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2.6"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/c430094541a80575259a94ff879063ef01473506"},{"url":"https://git.kernel.org/stable/c/befd23bd3b17f1a3f9c943a8580b47444c7c63ed"},{"url":"https://git.kernel.org/stable/c/a65c9afe9f2f55b7a7fb4a25ab654cd4139683a4"},{"url":"https://git.kernel.org/stable/c/c052cc1a069c3e575619cf64ec427eb41176ca70"}],"title":"staging: rtl8712: fix use-after-free in rtl8712_dl_fw","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47479","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-05-24T19:24:15.320557Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-06-04T17:13:37.514Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:39:59.455Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/c430094541a80575259a94ff879063ef01473506","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/befd23bd3b17f1a3f9c943a8580b47444c7c63ed","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/a65c9afe9f2f55b7a7fb4a25ab654cd4139683a4","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/c052cc1a069c3e575619cf64ec427eb41176ca70","tags":["x_transferred"]}]}]}}