CVE-2023-53235
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2023-53235
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53235.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2023-53235
- Downstream
- Related
- Published
- 2025-09-15T14:22:08Z
- Modified
- 2025-10-15T14:52:12.071471Z
- Summary
- drm/tests: helpers: Avoid a driver uaf
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
drm/tests: helpers: Avoid a driver uaf
when using _drmkunithelperallocdrmdevice() the driver may be dereferenced by device-managed resources up until the device is freed, which is typically later than the kunit-managed resource code frees it. Fix this by simply make the driver device-managed as well.
In short, the sequence leading to the UAF is as follows:
INIT: Code allocates a struct device as a kunit-managed resource. Code allocates a drm driver as a kunit-managed resource. Code allocates a drm device as a device-managed resource.
EXIT: Kunit resource cleanup frees the drm driver Kunit resource cleanup puts the struct device, which starts a device-managed resource cleanup device-managed cleanup calls drmdevput() drmdevput() dereferences the (now freed) drm driver -> Boom.
Related KASAN message: [55272.551542] ================================================================== [55272.551551] BUG: KASAN: slab-use-after-free in drmdevput.part.0+0xd4/0xe0 [drm] [55272.551603] Read of size 8 at addr ffff888127502828 by task kunittrycatch/10353
[55272.551612] CPU: 4 PID: 10353 Comm: kunittrycatch Tainted: G U N 6.5.0-rc7+ #155 [55272.551620] Hardware name: ASUS System Product Name/PRIME B560M-A AC, BIOS 0403 01/26/2021 [55272.551626] Call Trace: [55272.551629] <TASK> [55272.551633] dumpstacklvl+0x57/0x90 [55272.551639] printreport+0xcf/0x630 [55272.551645] ? _rawspinlockirqsave+0x5f/0x70 [55272.551652] ? drmdevput.part.0+0xd4/0xe0 [drm] [55272.551694] kasanreport+0xd7/0x110 [55272.551699] ? drmdevput.part.0+0xd4/0xe0 [drm] [55272.551742] drmdevput.part.0+0xd4/0xe0 [drm] [55272.551783] devresreleaseall+0x15d/0x1f0 [55272.551790] ? _pfxdevresreleaseall+0x10/0x10 [55272.551797] deviceunbindcleanup+0x16/0x1a0 [55272.551802] devicereleasedriverinternal+0x3e5/0x540 [55272.551808] ? kobjectput+0x5d/0x4b0 [55272.551814] busremovedevice+0x1f1/0x3f0 [55272.551819] devicedel+0x342/0x910 [55272.551826] ? _pfxdevicedel+0x10/0x10 [55272.551830] ? lockrelease+0x339/0x5e0 [55272.551836] ? kunitremoveresource+0x128/0x290 [kunit] [55272.551845] ? _pfxlockrelease+0x10/0x10 [55272.551851] platformdevicedel.part.0+0x1f/0x1e0 [55272.551856] ? _rawspinunlockirqrestore+0x30/0x60 [55272.551863] kunitremoveresource+0x195/0x290 [kunit] [55272.551871] ? rawspinunlockirqrestore+0x30/0x60 [55272.551877] kunitcleanup+0x78/0x120 [kunit] [55272.551885] ? _kthreadparkme+0xc1/0x1f0 [55272.551891] ? _pfxkunittryruncasecleanup+0x10/0x10 [kunit] [55272.551900] ? _pfxkunitgenericrunthreadfnadapter+0x10/0x10 [kunit] [55272.551909] kunitgenericrunthreadfnadapter+0x4a/0x90 [kunit] [55272.551919] kthread+0x2e7/0x3c0 [55272.551924] ? _pfxkthread+0x10/0x10 [55272.551929] retfromfork+0x2d/0x70 [55272.551935] ? _pfxkthread+0x10/0x10 [55272.551940] retfromforkasm+0x1b/0x30 [55272.551948] </TASK>
[55272.551953] Allocated by task 10351: [55272.551956] kasansavestack+0x1c/0x40 [55272.551962] kasansettrack+0x21/0x30 [55272.551966] _kasankmalloc+0x8b/0x90 [55272.551970] _kmalloc+0x5e/0x160 [55272.551976] kunitkmallocarray+0x1c/0x50 [kunit] [55272.551984] drmexectestinit+0xfa/0x2c0 [drmexectest] [55272.551991] kunittryruncase+0xdd/0x250 [kunit] [55272.551999] kunitgenericrunthreadfnadapter+0x4a/0x90 [kunit] [55272.552008] kthread+0x2e7/0x3c0 [55272.552012] retfromfork+0x2d/0x70 [55272.552017] retfromforkasm+0x1b/0x30
[55272.552024] Freed by task 10353: [55272.552027] kasansavestack+0x1c/0x40 [55272.552032] kasansettrack+0x21/0x30 [55272.552036] kasansavefreeinfo+0x27/0x40 [55272.552041] _kasanslabfree+0x106/0x180 [55272.552046] slabfreefreelisthook+0xb3/0x160 [55272.552051] _kmemcachefree+0xb2/0x290 [55272.552056] kunitremoveresource+0x195/0x290 [kunit] [55272.552064] kunit_cleanup+0x7 ---truncated---
- References
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd98780310719bf4076d975c2ff65c44c7c0d929eFixedc9d8be0e533738b744abb669263c4750d4830009
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd98780310719bf4076d975c2ff65c44c7c0d929eFixed139a27854bf5ce93ff9805f9f7683b88c13074dc
Affected versions
v6.*
Database specific
vanir_signatures
[
{
"digest": {
"line_hashes": [
"247837882404611040074757561968015924097",
"217825522308068106384229630385248158292",
"163717861373820329254095756942617949573",
"259644033639258417560553330233196444555",
"153538490158429398373400167386626301965"
],
"threshold": 0.9
},
"id": "CVE-2023-53235-3ed18899",
"target": {
"file": "include/drm/drm_kunit_helpers.h"
},
"signature_version": "v1",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@c9d8be0e533738b744abb669263c4750d4830009",
"signature_type": "Line"
},
{
"digest": {
"line_hashes": [
"247837882404611040074757561968015924097",
"217825522308068106384229630385248158292",
"163717861373820329254095756942617949573",
"259644033639258417560553330233196444555",
"153538490158429398373400167386626301965"
],
"threshold": 0.9
},
"id": "CVE-2023-53235-afdd9676",
"target": {
"file": "include/drm/drm_kunit_helpers.h"
},
"signature_version": "v1",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@139a27854bf5ce93ff9805f9f7683b88c13074dc",
"signature_type": "Line"
}
]