ghsa-55mc-5j7j-cj82
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
drm/bridge: megachips: Fix a null pointer dereference bug
When removing the module we will get the following warning:
[ 31.911505] i2c-core: driver [stdp2690-ge-b850v3-fw] unregistered [ 31.912484] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI [ 31.913338] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 31.915280] RIP: 0010:drm_bridge_remove+0x97/0x130 [ 31.921825] Call Trace: [ 31.922533] stdp4028_ge_b850v3_fw_remove+0x34/0x60 [megachips_stdpxxxx_ge_b850v3_fw] [ 31.923139] i2c_device_remove+0x181/0x1f0
The two bridges (stdp2690, stdp4028) do not probe at the same time, so the driver does not call ge_b850v3_resgiter() when probing, causing the driver to try to remove the object that has not been initialized.
Fix this by checking whether both the bridges are probed.
{
"affected": [],
"aliases": [
"CVE-2022-50317"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-15T15:15:43Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/bridge: megachips: Fix a null pointer dereference bug\n\nWhen removing the module we will get the following warning:\n\n[ 31.911505] i2c-core: driver [stdp2690-ge-b850v3-fw] unregistered\n[ 31.912484] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI\n[ 31.913338] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\n[ 31.915280] RIP: 0010:drm_bridge_remove+0x97/0x130\n[ 31.921825] Call Trace:\n[ 31.922533] stdp4028_ge_b850v3_fw_remove+0x34/0x60 [megachips_stdpxxxx_ge_b850v3_fw]\n[ 31.923139] i2c_device_remove+0x181/0x1f0\n\nThe two bridges (stdp2690, stdp4028) do not probe at the same time, so\nthe driver does not call ge_b850v3_resgiter() when probing, causing the\ndriver to try to remove the object that has not been initialized.\n\nFix this by checking whether both the bridges are probed.",
"id": "GHSA-55mc-5j7j-cj82",
"modified": "2025-09-15T15:31:27Z",
"published": "2025-09-15T15:31:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50317"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1daf69228e310938177119c4eadcd30fc75c81e0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1ff673333d46d2c1b053ebd0c1c7c7c79e36943e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/21764467ab396d9f08921e0a5ffa1214244e1ad9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4610e7a4111fa3f3ce27c09d6d94008c55f1cd31"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5bc20bafcd87ba0858ab772cefc7047cb51bc249"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7371fad5cfe6eada6bb5523c895fd6074b15c2b9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/877e92e9b1bdeb580b31a46061005936be902cd4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/aaa512ad1e59f2edf8a9e4f2b167a44b24670679"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
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