ghsa-cqg3-9qgq-grfj
Vulnerability from github
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.
{
"affected": [],
"aliases": [
"CVE-2022-50080"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-06-18T11:15:36Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntee: add overflow check in register_shm_helper()\n\nWith special lengths supplied by user space, register_shm_helper() has\nan integer overflow when calculating the number of pages covered by a\nsupplied user space memory region.\n\nThis causes internal_get_user_pages_fast() a helper function of\npin_user_pages_fast() to do a NULL pointer dereference:\n\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n Modules linked in:\n CPU: 1 PID: 173 Comm: optee_example_a Not tainted 5.19.0 #11\n Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015\n pc : internal_get_user_pages_fast+0x474/0xa80\n Call trace:\n internal_get_user_pages_fast+0x474/0xa80\n pin_user_pages_fast+0x24/0x4c\n register_shm_helper+0x194/0x330\n tee_shm_register_user_buf+0x78/0x120\n tee_ioctl+0xd0/0x11a0\n __arm64_sys_ioctl+0xa8/0xec\n invoke_syscall+0x48/0x114\n\nFix this by adding an an explicit call to access_ok() in\ntee_shm_register_user_buf() to catch an invalid user space address\nearly.",
"id": "GHSA-cqg3-9qgq-grfj",
"modified": "2025-06-18T12:30:47Z",
"published": "2025-06-18T12:30:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50080"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2f8e79a1a6128214cb9b205a9869341af5dfb16b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/573ae4f13f630d6660008f1974c0a8a29c30e18a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/578c349570d2a912401963783b36e0ec7a25c053"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/58c008d4d398f792ca67f35650610864725518fd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/965333345fe952cc7eebc8e3a565ffc709441af2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b37e0f17653c00b586cdbcdf0dbca475358ecffd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c12f0e6126ad223806a365084e86370511654bf1"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
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