{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-12T14:21:27.077","vulnerabilities":[{"cve":{"id":"CVE-2021-47479","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2024-05-22T09:15:09.817","lastModified":"2025-09-24T19:04:38.687","vulnStatus":"Analyzed","cveTags":[],"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"},{"lang":"es","value":"En el kernel de Linux, se resolvió la siguiente vulnerabilidad: staging: rtl8712: corrige el use-after-free en rtl8712_dl_fw Syzbot informó el use-after-free en rtl8712_dl_fw(). El problema estaba en la condición de ejecución entre la devolución de llamada r871xu_dev_remove() ->ndo_open(). Es fácil ver en el registro de fallos que el controlador accede al firmware lanzado en la devolución de llamada ->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":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.0,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.0,"impactScore":5.9}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-416"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2.6","versionEndExcluding":"3.3","matchCriteriaId":"46C6E342-8AB5-485B-B993-28AF7F43261E"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3.1","versionEndExcluding":"5.10.79","matchCriteriaId":"02912AB8-E6EC-4820-8783-665B58944796"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.14.18","matchCriteriaId":"B51F6469-3DD9-4E3B-8BD5-2E6911301BF1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"5.15.2","matchCriteriaId":"9BFCBC65-4DA5-4C88-B852-E7B052DE9F20"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:3.3:-:*:*:*:*:*:*","matchCriteriaId":"938CA222-4FA5-49B6-B828-242572B8208E"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*","matchCriteriaId":"A914303E-1CB6-4AAD-9F5F-DE5433C4E814"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:3.3:rc5:*:*:*:*:*:*","matchCriteriaId":"203BBA69-90B2-4C5E-8023-C14180742421"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:3.3:rc6:*:*:*:*:*:*","matchCriteriaId":"0DBFAB53-B889-4028-AC0E-7E165B152A18"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:3.3:rc7:*:*:*:*:*:*","matchCriteriaId":"FE409AEC-F677-4DEF-8EB7-2C35809043CE"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/a65c9afe9f2f55b7a7fb4a25ab654cd4139683a4","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/befd23bd3b17f1a3f9c943a8580b47444c7c63ed","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/c052cc1a069c3e575619cf64ec427eb41176ca70","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/c430094541a80575259a94ff879063ef01473506","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/a65c9afe9f2f55b7a7fb4a25ab654cd4139683a4","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/befd23bd3b17f1a3f9c943a8580b47444c7c63ed","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/c052cc1a069c3e575619cf64ec427eb41176ca70","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/c430094541a80575259a94ff879063ef01473506","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]}]}}]}