In the Linux kernel, the following vulnerability has been resolved:
net: hso: fix null-ptr-deref during tty device unregistration
Multiple ttys try to claim the same the minor number causing a double
unregistration of the same device. The first unregistration succeeds
but the next one results in a null-ptr-deref.
The get_free_serial_index() function returns an available minor number
but doesn't assign it immediately. The assignment is done by the caller
later. But before this assignment, calls to get_free_serial_index()
would return the same minor number.
Fix this by modifying get_free_serial_index to assign the minor number
immediately after one is found to be and rename it to obtain_minor()
to better reflect what it does. Similary, rename set_serial_by_index()
to release_minor() and modify it to free up the minor number of the
given hso_serial. Every obtain_minor() should have corresponding
release_minor() call.
References
Configurations
Configuration 1 (hide)
|
History
21 Nov 2024, 06:34
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/145c89c441d27696961752bf51b323f347601bee - Patch | |
| References | () https://git.kernel.org/stable/c/388d05f70f1ee0cac4a2068fd295072f1a44152a - Patch | |
| References | () https://git.kernel.org/stable/c/4a2933c88399c0ebc738db39bbce3ae89786d723 - Patch | |
| References | () https://git.kernel.org/stable/c/8a12f8836145ffe37e9c8733dce18c22fb668b66 - Patch | |
| References | () https://git.kernel.org/stable/c/92028d7a31e55d53e41cff679156b9432cffcb36 - Patch | |
| References | () https://git.kernel.org/stable/c/a462067d7c8e6953a733bf5ade8db947b1bb5449 - Patch | |
| References | () https://git.kernel.org/stable/c/caf5ac93b3b5d5fac032fc11fbea680e115421b4 - Patch | |
| References | () https://git.kernel.org/stable/c/dc195928d7e4ec7b5cfc6cd10dc4c8d87a7c72ac - Patch |
17 Apr 2024, 19:33
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-476 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| References | () https://git.kernel.org/stable/c/145c89c441d27696961752bf51b323f347601bee - Patch | |
| References | () https://git.kernel.org/stable/c/388d05f70f1ee0cac4a2068fd295072f1a44152a - Patch | |
| References | () https://git.kernel.org/stable/c/4a2933c88399c0ebc738db39bbce3ae89786d723 - Patch | |
| References | () https://git.kernel.org/stable/c/8a12f8836145ffe37e9c8733dce18c22fb668b66 - Patch | |
| References | () https://git.kernel.org/stable/c/92028d7a31e55d53e41cff679156b9432cffcb36 - Patch | |
| References | () https://git.kernel.org/stable/c/a462067d7c8e6953a733bf5ade8db947b1bb5449 - Patch | |
| References | () https://git.kernel.org/stable/c/caf5ac93b3b5d5fac032fc11fbea680e115421b4 - Patch | |
| References | () https://git.kernel.org/stable/c/dc195928d7e4ec7b5cfc6cd10dc4c8d87a7c72ac - Patch |
26 Feb 2024, 16:32
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-02-26 16:27
Updated : 2024-11-21 06:34
NVD link : CVE-2021-46904
Mitre link : CVE-2021-46904
CVE.ORG link : CVE-2021-46904
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference