ghsa-vjv2-ppj4-v42p
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
cxl/port: Hold port reference until decoder release
KASAN + DEBUG_KOBJECT_RELEASE reports a potential use-after-free in cxl_decoder_release() where it goes to reference its parent, a cxl_port, to free its id back to port->decoder_ida.
BUG: KASAN: use-after-free in to_cxl_port+0x18/0x90 [cxl_core] Read of size 8 at addr ffff888119270908 by task kworker/35:2/379
CPU: 35 PID: 379 Comm: kworker/35:2 Tainted: G OE 5.17.0-rc2+ #198 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 Workqueue: events kobject_delayed_cleanup Call Trace: dump_stack_lvl+0x59/0x73 print_address_description.constprop.0+0x1f/0x150 ? to_cxl_port+0x18/0x90 [cxl_core] kasan_report.cold+0x83/0xdf ? to_cxl_port+0x18/0x90 [cxl_core] to_cxl_port+0x18/0x90 [cxl_core] cxl_decoder_release+0x2a/0x60 [cxl_core] device_release+0x5f/0x100 kobject_cleanup+0x80/0x1c0
The device core only guarantees parent lifetime until all children are unregistered. If a child needs a parent to complete its ->release() callback that child needs to hold a reference to extend the lifetime of the parent.
{
"affected": [],
"aliases": [
"CVE-2022-49223"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-26T07:00:59Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/port: Hold port reference until decoder release\n\nKASAN + DEBUG_KOBJECT_RELEASE reports a potential use-after-free in\ncxl_decoder_release() where it goes to reference its parent, a cxl_port,\nto free its id back to port-\u003edecoder_ida.\n\n BUG: KASAN: use-after-free in to_cxl_port+0x18/0x90 [cxl_core]\n Read of size 8 at addr ffff888119270908 by task kworker/35:2/379\n\n CPU: 35 PID: 379 Comm: kworker/35:2 Tainted: G OE 5.17.0-rc2+ #198\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n Workqueue: events kobject_delayed_cleanup\n Call Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x59/0x73\n print_address_description.constprop.0+0x1f/0x150\n ? to_cxl_port+0x18/0x90 [cxl_core]\n kasan_report.cold+0x83/0xdf\n ? to_cxl_port+0x18/0x90 [cxl_core]\n to_cxl_port+0x18/0x90 [cxl_core]\n cxl_decoder_release+0x2a/0x60 [cxl_core]\n device_release+0x5f/0x100\n kobject_cleanup+0x80/0x1c0\n\nThe device core only guarantees parent lifetime until all children are\nunregistered. If a child needs a parent to complete its -\u003erelease()\ncallback that child needs to hold a reference to extend the lifetime of\nthe parent.",
"id": "GHSA-vjv2-ppj4-v42p",
"modified": "2025-02-27T21:32:13Z",
"published": "2025-02-27T21:32:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49223"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/49f2dab77a5e1354f5da6ccdc9346a8212697be2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/518bb96367123062b48b0a9842f2864249b565f6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/74be98774dfbc5b8b795db726bd772e735d2edd4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b0022ca445d5fc4d0c89d15dcd0f855977b22c1d"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.