跳转到帖子

Ubuntu: USN-6976-1 (CVE-2021-47173): Linux kernel vulnerabilities

recommended_posts

发布于
  • Members

Ubuntu: USN-6976-1 (CVE-2021-47173): Linux kernel vulnerabilities

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
03/25/2024
Created
11/21/2024
Added
11/19/2024
Modified
01/30/2025

Description

In the Linux kernel, the following vulnerability has been resolved: misc/uss720: fix memory leak in uss720_probe uss720_probe forgets to decrease the refcount of usbdev in uss720_probe. Fix this by decreasing the refcount of usbdev by usb_put_dev. BUG: memory leak unreferenced object 0xffff888101113800 (size 2048): comm "kworker/0:1", pid 7, jiffies 4294956777 (age 28.870s) hex dump (first 32 bytes): ff ff ff ff 31 00 00 00 00 00 00 00 00 00 00 00....1........... 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00................ backtrace: [<ffffffff82b8e822>] kmalloc include/linux/slab.h:554 [inline] [<ffffffff82b8e822>] kzalloc include/linux/slab.h:684 [inline] [<ffffffff82b8e822>] usb_alloc_dev+0x32/0x450 drivers/usb/core/usb.c:582 [<ffffffff82b98441>] hub_port_connect drivers/usb/core/hub.c:5129 [inline] [<ffffffff82b98441>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline] [<ffffffff82b98441>] port_event drivers/usb/core/hub.c:5509 [inline] [<ffffffff82b98441>] hub_event+0x1171/0x20c0 drivers/usb/core/hub.c:5591 [<ffffffff81259229>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275 [<ffffffff81259b19>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421 [<ffffffff81261228>] kthread+0x178/0x1b0 kernel/kthread.c:292 [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Solution(s)

  • ubuntu-upgrade-linux-image-4-4-0-1135-aws
  • ubuntu-upgrade-linux-image-4-4-0-1136-kvm
  • ubuntu-upgrade-linux-image-4-4-0-1173-aws
  • ubuntu-upgrade-linux-image-4-4-0-258-generic
  • ubuntu-upgrade-linux-image-4-4-0-258-lowlatency
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-lts-xenial
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-lts-xenial
  • ubuntu-upgrade-linux-image-virtual
  • ubuntu-upgrade-linux-image-virtual-lts-xenial

References

  • https://attackerkb.com/topics/cve-2021-47173
  • CVE - 2021-47173
  • USN-6976-1
  • https://git.kernel.org/stable/c/36b5ff1db1a4ef4fdbc2bae364344279f033ad88
  • https://git.kernel.org/stable/c/386918878ce4cd676e4607233866e03c9399a46a
  • https://git.kernel.org/stable/c/5394ae9d8c7961dd93807fdf1b12a1dde96b0a55
  • https://git.kernel.org/stable/c/5f46b2410db2c8f26b8bb91b40deebf4ec184391
  • https://git.kernel.org/stable/c/7889c70e6173ef358f3cd7578db127a489035a42
  • https://git.kernel.org/stable/c/a3c3face38cb49932c62adcc1289914f1c742096
  • https://git.kernel.org/stable/c/bcb30cc8f8befcbdbcf7a016e4dfd4747c54a364
  • https://git.kernel.org/stable/c/dcb4b8ad6a448532d8b681b5d1a7036210b622de
  • https://ubuntu.com/security/notices/USN-6976-1
  • https://www.cve.org/CVERecord?id=CVE-2021-47173
View more
  • 查看数 704
  • 已创建
  • 最后回复

参与讨论

你可立刻发布并稍后注册。 如果你有帐户,立刻登录发布帖子。
注意:你的帖子需要版主批准后才能看到。

游客
回帖…