CVE-2022-50068
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-50068
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50068.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-50068
- Downstream
- Related
- Published
- 2025-06-18T11:02:13Z
- Modified
- 2025-10-21T11:54:34.829591Z
- Summary
- drm/ttm: Fix dummy res NULL ptr deref bug
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
drm/ttm: Fix dummy res NULL ptr deref bug
Check the bo->resource value before accessing the resource mem_type.
v2: Fix commit description unwrapped warning
<log snip> [ 40.191227][ T184] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN PTI [ 40.192995][ T184] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 40.194411][ T184] CPU: 1 PID: 184 Comm: systemd-udevd Not tainted 5.19.0-rc4-00721-gb297c22b7070 #1 [ 40.196063][ T184] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-4 04/01/2014 [ 40.199605][ T184] RIP: 0010:ttmbovalidate+0x1b3/0x240 [ttm] [ 40.200754][ T184] Code: e8 72 c5 ff ff 83 f8 b8 74 d4 85 c0 75 54 49 8b 9e 58 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 10 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 44 8b 53 10 31 c0 85 d2 0f 85 58 [ 40.203685][ T184] RSP: 0018:ffffc900006df0c8 EFLAGS: 00010202 [ 40.204630][ T184] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff1102f4bb71b [ 40.205864][ T184] RDX: 0000000000000002 RSI: ffffc900006df208 RDI: 0000000000000010 [ 40.207102][ T184] RBP: 1ffff920000dbe1a R08: ffffc900006df208 R09: 0000000000000000 [ 40.208394][ T184] R10: ffff88817a5f0000 R11: 0000000000000001 R12: ffffc900006df110 [ 40.209692][ T184] R13: ffffc900006df0f0 R14: ffff88817a5db800 R15: ffffc900006df208 [ 40.210862][ T184] FS: 00007f6b1d16e8c0(0000) GS:ffff88839d700000(0000) knlGS:0000000000000000 [ 40.212250][ T184] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.213275][ T184] CR2: 000055a1001d4ff0 CR3: 00000001700f4000 CR4: 00000000000006e0 [ 40.214469][ T184] Call Trace: [ 40.214974][ T184] <TASK> [ 40.215438][ T184] ? ttmbobouncetempbuffer+0x140/0x140 [ttm] [ 40.216572][ T184] ? mutexspinonowner+0x240/0x240 [ 40.217456][ T184] ? drmvmaoffsetadd+0xaa/0x100 [drm] [ 40.218457][ T184] ttmboinitreserved+0x3d6/0x540 [ttm] [ 40.219410][ T184] ? shmemgetinode+0x744/0x980 [ 40.220231][ T184] ttmboinitvalidate+0xb1/0x200 [ttm] [ 40.221172][ T184] ? bodriverevictflags+0x340/0x340 [drmvramhelper] [ 40.222530][ T184] ? ttmboinitreserved+0x540/0x540 [ttm] [ 40.223643][ T184] ? _dosysfinitmodule+0x11a/0x1c0 [ 40.224654][ T184] ? _shmemfilesetup+0x102/0x280 [ 40.234764][ T184] drmgemvramcreate+0x305/0x480 [drmvramhelper] [ 40.235766][ T184] ? bodriverevictflags+0x340/0x340 [drmvramhelper] [ 40.236846][ T184] ? _kasanslabfree+0x108/0x180 [ 40.237650][ T184] drmgemvramfillcreatedumb+0x134/0x340 [drmvramhelper] [ 40.238864][ T184] ? localpciprobe+0xdf/0x180 [ 40.239674][ T184] ? drmmvramhelperinit+0x400/0x400 [drmvramhelper] [ 40.240826][ T184] drmclientframebuffercreate+0x19c/0x400 [drm] [ 40.241955][ T184] ? drmclientbufferdelete+0x200/0x200 [drm] [ 40.243001][ T184] ? drmclientpickcrtcs+0x554/0xb80 [drm] [ 40.244030][ T184] drmfbhelpergenericprobe+0x23f/0x940 [drmkmshelper] [ 40.245226][ T184] ? _condresched+0x1c/0xc0 [ 40.245987][ T184] ? drmfbhelpermemoryrangetoclip+0x180/0x180 [drmkmshelper] [ 40.247316][ T184] ? mutexunlock+0x80/0x100 [ 40.248005][ T184] ? _mutexunlockslowpath+0x2c0/0x2c0 [ 40.249083][ T184] drmfbhelpersinglefbprobe+0x907/0xf00 [drmkmshelper] [ 40.250314][ T184] ? drmfbhelpercheckvar+0x1180/0x1180 [drmkmshelper] [ 40.251540][ T184] ? _condresched+0x1c/0xc0 [ 40.252321][ T184] ? mutexlock+0x9f/0x100 [ 40.253062][ T184] _drmfbhelperinitialconfigandunlock+0xb9/0x2c0 [drmkmshelper] [ 40.254394][ T184] drmfbdevclienthotplug+0x56f/0x840 [drmkmshelper] [ 40.255477][ T184] drmfbdevgenericsetup+0x165/0x3c0 [drmkmshelper] [ 40.256607][ T184] bochspciprobe+0x6b7/0x900 [bochs] [
---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
-
Introducedd3116756a710e3cd51293a9d58b525957ab7e784Fixed76672cd326c146ded2c2712ff257b8908dcf23d8
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd3116756a710e3cd51293a9d58b525957ab7e784Fixed9bd970d4097287778a4449452e70b35d0bfaa3aa
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd3116756a710e3cd51293a9d58b525957ab7e784Fixedcf4b7387c0a842d64bdd7c353e6d3298174a7740
Affected versions
v5.*
Database specific
vanir_signatures
[
{
"id": "CVE-2022-50068-137ca401",
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@76672cd326c146ded2c2712ff257b8908dcf23d8",
"signature_type": "Function",
"digest": {
"function_hash": "136157327698035447112143071439702023971",
"length": 475.0
},
"deprecated": false,
"target": {
"function": "ttm_bo_validate",
"file": "drivers/gpu/drm/ttm/ttm_bo.c"
}
},
{
"id": "CVE-2022-50068-5c18e171",
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@cf4b7387c0a842d64bdd7c353e6d3298174a7740",
"signature_type": "Line",
"digest": {
"threshold": 0.9,
"line_hashes": [
"274811147257274297507885245988351621100",
"329836695686830209919994729966781464040",
"268271623807680260673720152821144121971",
"91130331918094027635169871079134742116"
]
},
"deprecated": false,
"target": {
"file": "drivers/gpu/drm/ttm/ttm_bo.c"
}
},
{
"id": "CVE-2022-50068-60c50332",
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@9bd970d4097287778a4449452e70b35d0bfaa3aa",
"signature_type": "Line",
"digest": {
"threshold": 0.9,
"line_hashes": [
"274811147257274297507885245988351621100",
"329836695686830209919994729966781464040",
"268271623807680260673720152821144121971",
"91130331918094027635169871079134742116"
]
},
"deprecated": false,
"target": {
"file": "drivers/gpu/drm/ttm/ttm_bo.c"
}
},
{
"id": "CVE-2022-50068-7c063bf9",
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@cf4b7387c0a842d64bdd7c353e6d3298174a7740",
"signature_type": "Function",
"digest": {
"function_hash": "30469851722414224357558593679102302113",
"length": 455.0
},
"deprecated": false,
"target": {
"function": "ttm_bo_validate",
"file": "drivers/gpu/drm/ttm/ttm_bo.c"
}
},
{
"id": "CVE-2022-50068-ab55978e",
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@76672cd326c146ded2c2712ff257b8908dcf23d8",
"signature_type": "Line",
"digest": {
"threshold": 0.9,
"line_hashes": [
"274811147257274297507885245988351621100",
"329836695686830209919994729966781464040",
"268271623807680260673720152821144121971",
"91130331918094027635169871079134742116"
]
},
"deprecated": false,
"target": {
"file": "drivers/gpu/drm/ttm/ttm_bo.c"
}
},
{
"id": "CVE-2022-50068-e445aaeb",
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@9bd970d4097287778a4449452e70b35d0bfaa3aa",
"signature_type": "Function",
"digest": {
"function_hash": "30469851722414224357558593679102302113",
"length": 455.0
},
"deprecated": false,
"target": {
"function": "ttm_bo_validate",
"file": "drivers/gpu/drm/ttm/ttm_bo.c"
}
}
]