ghsa-3vrc-v2w2-8gq7
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
cifs: fix use-after-free bug in refresh_cache_worker()
The UAF bug occurred because we were putting DFS root sessions in cifs_umount() while DFS cache refresher was being executed.
Make DFS root sessions have same lifetime as DFS tcons so we can avoid the use-after-free bug is DFS cache refresher and other places that require IPCs to get new DFS referrals on. Also, get rid of mount group handling in DFS cache as we no longer need it.
This fixes below use-after-free bug catched by KASAN
[ 379.946955] BUG: KASAN: use-after-free in __refresh_tcon.isra.0+0x10b/0xc10 [cifs] [ 379.947642] Read of size 8 at addr ffff888018f57030 by task kworker/u4:3/56 [ 379.948096] [ 379.948208] CPU: 0 PID: 56 Comm: kworker/u4:3 Not tainted 6.2.0-rc7-lku #23 [ 379.948661] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.0-0-gd239552-rebuilt.opensuse.org 04/01/2014 [ 379.949368] Workqueue: cifs-dfscache refresh_cache_worker [cifs] [ 379.949942] Call Trace: [ 379.950113] [ 379.950260] dump_stack_lvl+0x50/0x67 [ 379.950510] print_report+0x16a/0x48e [ 379.950759] ? __virt_addr_valid+0xd8/0x160 [ 379.951040] ? __phys_addr+0x41/0x80 [ 379.951285] kasan_report+0xdb/0x110 [ 379.951533] ? __refresh_tcon.isra.0+0x10b/0xc10 [cifs] [ 379.952056] ? __refresh_tcon.isra.0+0x10b/0xc10 [cifs] [ 379.952585] __refresh_tcon.isra.0+0x10b/0xc10 [cifs] [ 379.953096] ? __pfxrefreshtcon.isra.0+0x10/0x10 [cifs] [ 379.953637] ? pfxmutexlock+0x10/0x10 [ 379.953915] ? lock_release+0xb6/0x720 [ 379.954167] ? pfx_lock_acquire+0x10/0x10 [ 379.954443] ? refresh_cache_worker+0x34e/0x6d0 [cifs] [ 379.954960] ? __pfx_wb_workfn+0x10/0x10 [ 379.955239] refresh_cache_worker+0x4ad/0x6d0 [cifs] [ 379.955755] ? __pfx_refresh_cache_worker+0x10/0x10 [cifs] [ 379.956323] ? __pfx_lock_acquired+0x10/0x10 [ 379.956615] ? read_word_at_a_time+0xe/0x20 [ 379.956898] ? lockdep_hardirqs_on_prepare+0x12/0x220 [ 379.957235] process_one_work+0x535/0x990 [ 379.957509] ? __pfx_process_one_work+0x10/0x10 [ 379.957812] ? lock_acquired+0xb7/0x5f0 [ 379.958069] ? __list_add_valid+0x37/0xd0 [ 379.958341] ? __list_add_valid+0x37/0xd0 [ 379.958611] worker_thread+0x8e/0x630 [ 379.958861] ? __pfx_worker_thread+0x10/0x10 [ 379.959148] kthread+0x17d/0x1b0 [ 379.959369] ? __pfx_kthread+0x10/0x10 [ 379.959630] ret_from_fork+0x2c/0x50 [ 379.959879]
{
"affected": [],
"aliases": [
"CVE-2023-53052"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-05-02T16:15:24Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix use-after-free bug in refresh_cache_worker()\n\nThe UAF bug occurred because we were putting DFS root sessions in\ncifs_umount() while DFS cache refresher was being executed.\n\nMake DFS root sessions have same lifetime as DFS tcons so we can avoid\nthe use-after-free bug is DFS cache refresher and other places that\nrequire IPCs to get new DFS referrals on. Also, get rid of mount\ngroup handling in DFS cache as we no longer need it.\n\nThis fixes below use-after-free bug catched by KASAN\n\n[ 379.946955] BUG: KASAN: use-after-free in __refresh_tcon.isra.0+0x10b/0xc10 [cifs]\n[ 379.947642] Read of size 8 at addr ffff888018f57030 by task kworker/u4:3/56\n[ 379.948096]\n[ 379.948208] CPU: 0 PID: 56 Comm: kworker/u4:3 Not tainted 6.2.0-rc7-lku #23\n[ 379.948661] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS\nrel-1.16.0-0-gd239552-rebuilt.opensuse.org 04/01/2014\n[ 379.949368] Workqueue: cifs-dfscache refresh_cache_worker [cifs]\n[ 379.949942] Call Trace:\n[ 379.950113] \u003cTASK\u003e\n[ 379.950260] dump_stack_lvl+0x50/0x67\n[ 379.950510] print_report+0x16a/0x48e\n[ 379.950759] ? __virt_addr_valid+0xd8/0x160\n[ 379.951040] ? __phys_addr+0x41/0x80\n[ 379.951285] kasan_report+0xdb/0x110\n[ 379.951533] ? __refresh_tcon.isra.0+0x10b/0xc10 [cifs]\n[ 379.952056] ? __refresh_tcon.isra.0+0x10b/0xc10 [cifs]\n[ 379.952585] __refresh_tcon.isra.0+0x10b/0xc10 [cifs]\n[ 379.953096] ? __pfx___refresh_tcon.isra.0+0x10/0x10 [cifs]\n[ 379.953637] ? __pfx___mutex_lock+0x10/0x10\n[ 379.953915] ? lock_release+0xb6/0x720\n[ 379.954167] ? __pfx_lock_acquire+0x10/0x10\n[ 379.954443] ? refresh_cache_worker+0x34e/0x6d0 [cifs]\n[ 379.954960] ? __pfx_wb_workfn+0x10/0x10\n[ 379.955239] refresh_cache_worker+0x4ad/0x6d0 [cifs]\n[ 379.955755] ? __pfx_refresh_cache_worker+0x10/0x10 [cifs]\n[ 379.956323] ? __pfx_lock_acquired+0x10/0x10\n[ 379.956615] ? read_word_at_a_time+0xe/0x20\n[ 379.956898] ? lockdep_hardirqs_on_prepare+0x12/0x220\n[ 379.957235] process_one_work+0x535/0x990\n[ 379.957509] ? __pfx_process_one_work+0x10/0x10\n[ 379.957812] ? lock_acquired+0xb7/0x5f0\n[ 379.958069] ? __list_add_valid+0x37/0xd0\n[ 379.958341] ? __list_add_valid+0x37/0xd0\n[ 379.958611] worker_thread+0x8e/0x630\n[ 379.958861] ? __pfx_worker_thread+0x10/0x10\n[ 379.959148] kthread+0x17d/0x1b0\n[ 379.959369] ? __pfx_kthread+0x10/0x10\n[ 379.959630] ret_from_fork+0x2c/0x50\n[ 379.959879] \u003c/TASK\u003e",
"id": "GHSA-3vrc-v2w2-8gq7",
"modified": "2025-05-02T18:31:33Z",
"published": "2025-05-02T18:31:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53052"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/396935de145589c8bfe552fa03a5e38604071829"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5a89d81c1a3c152837ea204fd29572228e54ce0b"
}
],
"schema_version": "1.4.0",
"severity": []
}
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.