CVE-2021-47239
In the Linux kernel, the following vulnerability has been resolved: net: usb: fix possible use-after-free in smsc75xx_bind The commit 46a8b29c6306 ("net: usb: fix memory leak in smsc75xx_bind") fails to clean up the work scheduled in smsc75xx_reset->…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.23%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: net: usb: fix possible use-after-free in smsc75xx_bind The commit 46a8b29c6306 ("net: usb: fix memory leak in smsc75xx_bind") fails to clean up the work scheduled in smsc75xx_reset-> smsc75xx_set_multicast, which leads to use-after-free if the work is scheduled to start after the deallocation. In addition, this patch also removes a dangling pointer - dev->data[0]. This patch calls cancel_work_sync to cancel the scheduled work and set the dangling pointer to NULL.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.23% probability · 14th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/14616c372a7be01a2fb8c56c9d8debd232b9e43dPatch
- https://git.kernel.org/stable/c/2fc8300c9cfa5167fcb5b1a2a07db6f53e82f59bPatch
- https://git.kernel.org/stable/c/4252bf6c2b245f47011098113d405ffad6ad5d5bPatch
- https://git.kernel.org/stable/c/56b786d86694e079d8aad9b314e015cd4ac02a3dPatch
- https://git.kernel.org/stable/c/570a52cf3e01d19f7fd1a251dfc52b0cd86c13cbPatch
- https://git.kernel.org/stable/c/64160d1741a3de5204d1a822e058e0b4cc526504Patch
- https://git.kernel.org/stable/c/7cc8b2e05fcea6edd022d26e82091d781af8fd9bPatch
- https://git.kernel.org/stable/c/c4e3be2e7742863e454ce31faf8fd0109c00050bPatch
- https://git.kernel.org/stable/c/14616c372a7be01a2fb8c56c9d8debd232b9e43dPatch
- https://git.kernel.org/stable/c/2fc8300c9cfa5167fcb5b1a2a07db6f53e82f59bPatch
- https://git.kernel.org/stable/c/4252bf6c2b245f47011098113d405ffad6ad5d5bPatch
- https://git.kernel.org/stable/c/56b786d86694e079d8aad9b314e015cd4ac02a3dPatch
- https://git.kernel.org/stable/c/570a52cf3e01d19f7fd1a251dfc52b0cd86c13cbPatch
- https://git.kernel.org/stable/c/64160d1741a3de5204d1a822e058e0b4cc526504Patch
- https://git.kernel.org/stable/c/7cc8b2e05fcea6edd022d26e82091d781af8fd9bPatch
- https://git.kernel.org/stable/c/c4e3be2e7742863e454ce31faf8fd0109c00050bPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.