Executive Summary



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Informations
Name CVE-2022-50080 First vendor Publication 2025-06-18
Vendor Cve Last vendor Modification 2025-06-18

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

In the Linux kernel, the following vulnerability has been resolved:

tee: add overflow check in register_shm_helper()

With special lengths supplied by user space, register_shm_helper() has an integer overflow when calculating the number of pages covered by a supplied user space memory region.

This causes internal_get_user_pages_fast() a helper function of pin_user_pages_fast() to do a NULL pointer dereference:

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010
Modules linked in:
CPU: 1 PID: 173 Comm: optee_example_a Not tainted 5.19.0 #11
Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015
pc : internal_get_user_pages_fast+0x474/0xa80
Call trace:
internal_get_user_pages_fast+0x474/0xa80
pin_user_pages_fast+0x24/0x4c
register_shm_helper+0x194/0x330
tee_shm_register_user_buf+0x78/0x120
tee_ioctl+0xd0/0x11a0
__arm64_sys_ioctl+0xa8/0xec
invoke_syscall+0x48/0x114

Fix this by adding an an explicit call to access_ok() in tee_shm_register_user_buf() to catch an invalid user space address early.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-50080

Sources (Detail)

https://git.kernel.org/stable/c/2f8e79a1a6128214cb9b205a9869341af5dfb16b
https://git.kernel.org/stable/c/573ae4f13f630d6660008f1974c0a8a29c30e18a
https://git.kernel.org/stable/c/578c349570d2a912401963783b36e0ec7a25c053
https://git.kernel.org/stable/c/58c008d4d398f792ca67f35650610864725518fd
https://git.kernel.org/stable/c/965333345fe952cc7eebc8e3a565ffc709441af2
https://git.kernel.org/stable/c/b37e0f17653c00b586cdbcdf0dbca475358ecffd
https://git.kernel.org/stable/c/c12f0e6126ad223806a365084e86370511654bf1
Source Url

Alert History

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0
Date Informations
2025-06-18 17:20:34
  • First insertion