CVE-2024-36896
In the Linux kernel, the following vulnerability has been resolved: USB: core: Fix access violation during port device removal Testing with KASAN and syzkaller revealed a bug in port.c:disable_store(): usb_hub_to_struct_hub() can return NULL if the hub…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.92%). 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: USB: core: Fix access violation during port device removal Testing with KASAN and syzkaller revealed a bug in port.c:disable_store(): usb_hub_to_struct_hub() can return NULL if the hub that the port belongs to is concurrently removed, but the function does not check for this possibility before dereferencing the returned value. It turns out that the first dereference is unnecessary, since hub->intfdev is the parent of the port device, so it can be changed easily. Adding a check for hub == NULL prevents further problems. The same bug exists in the disable_show() routine, and it can be fixed the same way.
- CVSS 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- EPSS
- 0.92% probability · 58th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/5f1d68ef5ddac27c6b997adccd1c339cef1e6848Patch
- https://git.kernel.org/stable/c/6119ef6517ce501fc548154691abdaf1f954a277Patch
- https://git.kernel.org/stable/c/63533549ff53d24daf47c443dbd43c308afc3434Patch
- https://git.kernel.org/stable/c/a4b46d450c49f32e9d4247b421e58083fde304cePatch
- https://git.kernel.org/stable/c/5f1d68ef5ddac27c6b997adccd1c339cef1e6848Patch
- https://git.kernel.org/stable/c/6119ef6517ce501fc548154691abdaf1f954a277Patch
- https://git.kernel.org/stable/c/63533549ff53d24daf47c443dbd43c308afc3434Patch
- https://git.kernel.org/stable/c/a4b46d450c49f32e9d4247b421e58083fde304cePatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.