CVE-2023-52570— vfio/mdev: Fix a null-ptr-deref bug for mdev_unregister_parent()
Quick assessment
Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于mdev_type_remove()可能会遍历parent_remove_sysfs_files()中未初始化的parent->types[i]。
Possible ATT&CK Techniques 1 AI
T1055 · Process InjectionAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | da44c340c4fe9d9653ae84fa6a60f406bafcffce< c01b2e0ee22ef8b4dd7509a93aecc0ac0826bae4 |
affected |
da44c340c4fe9d9653ae84fa6a60f406bafcffce< 52093779b1830ac184a23848d971f06404cf513e |
affected | ||
da44c340c4fe9d9653ae84fa6a60f406bafcffce< c777b11d34e0f47dbbc4b018ef65ad030f2b283a |
affected | ||
6.1 |
affected | ||
< 6.1 |
unaffected | ||
6.1.56≤ 6.1.* |
unaffected | ||
6.5.6≤ 6.5.* |
unaffected | ||
6.6≤ * |
unaffected |
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I. Basic Information for CVE-2023-52570
Vulnerability Information
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Vulnerability Title
vfio/mdev: Fix a null-ptr-deref bug for mdev_unregister_parent()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
vfio/mdev: Fix a null-ptr-deref bug for mdev_unregister_parent()
Inject fault while probing mdpy.ko, if kstrdup() of create_dir() fails in
kobject_add_internal() in kobject_init_and_add() in mdev_type_add()
in parent_create_sysfs_files(), it will return 0 and probe successfully.
And when rmmod mdpy.ko, the mdpy_dev_exit() will call
mdev_unregister_parent(), the mdev_type_remove() may traverse uninitialized
parent->types[i] in parent_remove_sysfs_files(), and it will cause
below null-ptr-deref.
If mdev_type_add() fails, return the error code and kset_unregister()
to fix the issue.
general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 2 PID: 10215 Comm: rmmod Tainted: G W N 6.6.0-rc2+ #20
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
RIP: 0010:__kobject_del+0x62/0x1c0
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 51 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 28 48 8d 7d 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 24 01 00 00 48 8b 75 10 48 89 df 48 8d 6b 3c e8
RSP: 0018:ffff88810695fd30 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffffffffa0270268 RCX: 0000000000000000
RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000010
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed10233a4ef1
R10: ffff888119d2778b R11: 0000000063666572 R12: 0000000000000000
R13: fffffbfff404e2d4 R14: dffffc0000000000 R15: ffffffffa0271660
FS: 00007fbc81981540(0000) GS:ffff888119d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc14a142dc0 CR3: 0000000110a62003 CR4: 0000000000770ee0
DR0: ffffffff8fb0bce8 DR1: ffffffff8fb0bce9 DR2: ffffffff8fb0bcea
DR3: ffffffff8fb0bceb DR6: 00000000fffe0ff0 DR7: 0000000000000600
PKRU: 55555554
Call Trace:
<TASK>
? die_addr+0x3d/0xa0
? exc_general_protection+0x144/0x220
? asm_exc_general_protection+0x22/0x30
? __kobject_del+0x62/0x1c0
kobject_del+0x32/0x50
parent_remove_sysfs_files+0xd6/0x170 [mdev]
mdev_unregister_parent+0xfb/0x190 [mdev]
? mdev_register_parent+0x270/0x270 [mdev]
? find_module_all+0x9d/0xe0
mdpy_dev_exit+0x17/0x63 [mdpy]
__do_sys_delete_module.constprop.0+0x2fa/0x4b0
? module_flags+0x300/0x300
? __fput+0x4e7/0xa00
do_syscall_64+0x35/0x80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7fbc813221b7
Code: 73 01 c3 48 8b 0d d1 8c 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 b0 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 8c 2c 00 f7 d8 64 89 01 48
RSP: 002b:00007ffe780e0648 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0
RAX: ffffffffffffffda RBX: 00007ffe780e06a8 RCX: 00007fbc813221b7
RDX: 000000000000000a RSI: 0000000000000800 RDI: 000055e214df9b58
RBP: 000055e214df9af0 R08: 00007ffe780df5c1 R09: 0000000000000000
R10: 00007fbc8139ecc0 R11: 0000000000000206 R12: 00007ffe780e0870
R13: 00007ffe780e0ed0 R14: 000055e214df9260 R15: 000055e214df9af0
</TASK>
Modules linked in: mdpy(-) mdev vfio_iommu_type1 vfio [last unloaded: mdpy]
Dumping ftrace buffer:
(ftrace buffer empty)
---[ end trace 0000000000000000 ]---
RIP: 0010:__kobject_del+0x62/0x1c0
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 51 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 28 48 8d 7d 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 24 01 00 00 48 8b 75 10 48 89 df 48 8d 6b 3c e8
RSP: 0018:ffff88810695fd30 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffffffffa0270268 RCX: 0000000000000000
RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000010
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed10233a4ef1
R10: ffff888119d2778b R11: 0000000063666572 R12: 0000000000000000
R13: fffffbfff404e2d4 R14: dffffc0000000000 R15: ffffffffa0271660
FS: 00007fbc81981540(0000) GS:ffff888119d00000(000
---truncated---
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于mdev_type_remove()可能会遍历parent_remove_sysfs_files()中未初始化的parent->types[i]。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2023-52570
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|---|
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Other References for CVE-2023-52570 (3)
Same Patch Batch · Linux · 2024-03-02 · 57 CVEs total
| CVE-2023-52515 | 9.8 CRITICAL | RDMA/srp: Do not call scsi_done() from srp_abort() |
| CVE-2023-52530 | 8.8 HIGH | wifi: mac80211: fix potential key use-after-free |
| CVE-2023-52522 | 8.8 HIGH | net: fix possible store tearing in neigh_periodic_work() |
| CVE-2023-52502 | 8.8 HIGH | net: nfc: fix races in nfc_llcp_sock_get() and nfc_llcp_sock_get_sn() |
| CVE-2024-26621 | 8.2 HIGH | mm: huge_memory: don't force huge page alignment on 32 bit |
| CVE-2023-52523 | 7.8 HIGH | bpf, sockmap: Reject sk_msg egress redirects to non-TCP sockets |
| CVE-2023-52509 | 7.8 HIGH | ravb: Fix use-after-free issue in ravb_tx_timeout_work() |
| CVE-2023-52572 | 7.8 HIGH | cifs: Fix UAF in cifs_demultiplex_thread() |
| CVE-2023-52574 | 7.8 HIGH | team: fix null-ptr-deref when team device type is changed |
| CVE-2023-52517 | 7.8 HIGH | spi: sun6i: fix race between DMA RX transfer completion and RX FIFO drain |
| CVE-2023-52503 | 7.8 HIGH | tee: amdtee: fix use-after-free vulnerability in amdtee_close_session |
| CVE-2023-52513 | 7.5 HIGH | RDMA/siw: Fix connection failure handling |
| CVE-2023-52565 | 7.1 HIGH | media: uvcvideo: Fix OOB read |
| CVE-2023-52559 | iommu/vt-d: Avoid memory allocation in iommu_suspend() | |
| CVE-2023-52561 | arm64: dts: qcom: sdm845-db845c: Mark cont splash memory region as reserved | |
| CVE-2023-52563 | drm/meson: fix memory leak on ->hpd_notify callback | |
| CVE-2023-52564 | Revert "tty: n_gsm: fix UAF in gsm_cleanup_mux" | |
| CVE-2023-52582 | netfs: Only call folio_start_fscache() one time for each folio | |
| CVE-2023-52518 | Bluetooth: hci_codec: Fix leaking content of local_codecs | |
| CVE-2023-52560 | mm/damon/vaddr-test: fix memory leak in damon_do_test_apply_three_regions() |
Showing top 20 of 57 CVEs. View all on vendor page → →
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V. Comments for CVE-2023-52570
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