CVE-2021-47344 media: zr364xx: fix memory leak in zr364xx_start_readpipe
A memory leak in the zr364xx USB camera driver allows attackers to cause a denial of service by triggering repeated probe failures.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-47344?
CVE-2021-47344 is a medium-severity denial of service vulnerability in Linux kernel, published on 21 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
media: zr364xx: fix memory leak in zr364xx_start_readpipe
syzbot reported memory leak in zr364xx driver. The problem was in non-freed urb in case of usb_submit_urb() fail.
backtrace: [<ffffffff82baedf6>] kmalloc include/linux/slab.h:561 [inline] [<ffffffff82baedf6>] usb_alloc_urb+0x66/0xe0 drivers/usb/core/urb.c:74 [<ffffffff82f7cce8>] zr364xx_start_readpipe+0x78/0x130 drivers/media/usb/zr364xx/zr364xx.c:1022 [<ffffffff84251dfc>] zr364xx_board_init drivers/media/usb/zr364xx/zr364xx.c:1383 [inline] [<ffffffff84251dfc>] zr364xx_probe+0x6a3/0x851 drivers/media/usb/zr364xx/zr364xx.c:1516 [<ffffffff82bb6507>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<ffffffff826018a9>] really_probe+0x159/0x500 drivers/base/dd.c:576
Weakness: CWE-401
Which versions are affected by CVE-2021-47344?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47344?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-47344 being exploited?
There is no known exploitation of CVE-2021-47344 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-47344, GHSA-hm5p-668j-x4q6, UBUNTU-CVE-2021-47344.