CVE-2021-47479
See a problem?- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47479
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47479.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47479
- Related
- Published
- 2024-05-22T09:15:09Z
- Modified
- 2024-09-18T03:17:28.995682Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
staging: rtl8712: fix use-after-free in rtl8712dlfw
Syzbot reported use-after-free in rtl8712dlfw(). The problem was in race condition between r871xudevremove() ->ndo_open() callback.
It's easy to see from crash log, that driver accesses released firmware in ->ndoopen() callback. It may happen, since driver was releasing firmware _before unregistering netdev. Fix it by moving unregister_netdev() before cleaning up resources.
Call Trace: ... rtl871xopenfw drivers/staging/rtl8712/halinit.c:83 [inline] rtl8712dlfw+0xd95/0xe10 drivers/staging/rtl8712/halinit.c:170 rtl8712halinit drivers/staging/rtl8712/halinit.c:330 [inline] rtl871xhalinit+0xae/0x180 drivers/staging/rtl8712/halinit.c:394 netdevopen+0xe6/0x6c0 drivers/staging/rtl8712/osintfs.c:380 _devopen+0x2bc/0x4d0 net/core/dev.c:1484
Freed by task 1306: ... releasefirmware+0x1b/0x30 drivers/base/firmwareloader/main.c:1053 r871xudevremove+0xcc/0x2c0 drivers/staging/rtl8712/usbintf.c:599 usbunbind_interface+0x1d8/0x8d0 drivers/usb/core/driver.c:458
- References
-
- https://git.kernel.org/stable/c/a65c9afe9f2f55b7a7fb4a25ab654cd4139683a4
- https://git.kernel.org/stable/c/befd23bd3b17f1a3f9c943a8580b47444c7c63ed
- https://git.kernel.org/stable/c/c052cc1a069c3e575619cf64ec427eb41176ca70
- https://git.kernel.org/stable/c/c430094541a80575259a94ff879063ef01473506
- https://security-tracker.debian.org/tracker/CVE-2021-47479
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source