CVE-2023-52842— virtio/vsock: Fix uninit-value in virtio_transport_recv_pkt()
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virtio/vsock模块存在漏洞。
Possible ATT&CK Techniques 1 AI
T1074 · Data StagedAffected Version Matrix 7
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | baddcc2c71572968cdaeee1c4ab3dc0ad90fa765< cd12535b97dd7d18cf655ec78ce1cf1f29a576be |
affected |
71dc9ec9ac7d3eee785cdc986c3daeb821381e20< 0b8906fb48b99e993d6e8a12539f618f4854dd26 |
affected | ||
71dc9ec9ac7d3eee785cdc986c3daeb821381e20< 34c4effacfc329aeca5635a69fd9e0f6c90b4101 |
affected | ||
6.3 |
affected | ||
< 6.3 |
unaffected | ||
6.6.2≤ 6.6.* |
unaffected | ||
6.7≤ * |
unaffected |
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I. Basic Information for CVE-2023-52842
Vulnerability Information
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Vulnerability Title
virtio/vsock: Fix uninit-value in virtio_transport_recv_pkt()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
virtio/vsock: Fix uninit-value in virtio_transport_recv_pkt()
KMSAN reported the following uninit-value access issue:
=====================================================
BUG: KMSAN: uninit-value in virtio_transport_recv_pkt+0x1dfb/0x26a0 net/vmw_vsock/virtio_transport_common.c:1421
virtio_transport_recv_pkt+0x1dfb/0x26a0 net/vmw_vsock/virtio_transport_common.c:1421
vsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120
process_one_work kernel/workqueue.c:2630 [inline]
process_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703
worker_thread+0xeca/0x14d0 kernel/workqueue.c:2784
kthread+0x3cc/0x520 kernel/kthread.c:388
ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Uninit was stored to memory at:
virtio_transport_space_update net/vmw_vsock/virtio_transport_common.c:1274 [inline]
virtio_transport_recv_pkt+0x1ee8/0x26a0 net/vmw_vsock/virtio_transport_common.c:1415
vsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120
process_one_work kernel/workqueue.c:2630 [inline]
process_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703
worker_thread+0xeca/0x14d0 kernel/workqueue.c:2784
kthread+0x3cc/0x520 kernel/kthread.c:388
ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Uninit was created at:
slab_post_alloc_hook+0x105/0xad0 mm/slab.h:767
slab_alloc_node mm/slub.c:3478 [inline]
kmem_cache_alloc_node+0x5a2/0xaf0 mm/slub.c:3523
kmalloc_reserve+0x13c/0x4a0 net/core/skbuff.c:559
__alloc_skb+0x2fd/0x770 net/core/skbuff.c:650
alloc_skb include/linux/skbuff.h:1286 [inline]
virtio_vsock_alloc_skb include/linux/virtio_vsock.h:66 [inline]
virtio_transport_alloc_skb+0x90/0x11e0 net/vmw_vsock/virtio_transport_common.c:58
virtio_transport_reset_no_sock net/vmw_vsock/virtio_transport_common.c:957 [inline]
virtio_transport_recv_pkt+0x1279/0x26a0 net/vmw_vsock/virtio_transport_common.c:1387
vsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120
process_one_work kernel/workqueue.c:2630 [inline]
process_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703
worker_thread+0xeca/0x14d0 kernel/workqueue.c:2784
kthread+0x3cc/0x520 kernel/kthread.c:388
ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
CPU: 1 PID: 10664 Comm: kworker/1:5 Not tainted 6.6.0-rc3-00146-g9f3ebbef746f #3
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-1.fc38 04/01/2014
Workqueue: vsock-loopback vsock_loopback_work
=====================================================
The following simple reproducer can cause the issue described above:
int main(void)
{
int sock;
struct sockaddr_vm addr = {
.svm_family = AF_VSOCK,
.svm_cid = VMADDR_CID_ANY,
.svm_port = 1234,
};
sock = socket(AF_VSOCK, SOCK_STREAM, 0);
connect(sock, (struct sockaddr *)&addr, sizeof(addr));
return 0;
}
This issue occurs because the `buf_alloc` and `fwd_cnt` fields of the
`struct virtio_vsock_hdr` are not initialized when a new skb is allocated
in `virtio_transport_init_hdr()`. This patch resolves the issue by
initializing these fields during allocation.
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virtio/vsock模块存在漏洞。
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-2023-52842
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2023-52842 (2)
Same Patch Batch · Linux · 2024-05-21 · 361 CVEs total
| CVE-2021-47427 | 9.8 CRITICAL | scsi: iscsi: Fix iscsi_task use after free |
| CVE-2021-47328 | 9.8 CRITICAL | scsi: iscsi: Fix conn use after free during resets |
| CVE-2023-52732 | 9.8 CRITICAL | ceph: blocklist the kclient when receiving corrupted snap trace |
| CVE-2023-52741 | 9.8 CRITICAL | cifs: Fix use-after-free in rdata->read_into_pages() |
| CVE-2021-47232 | 9.8 CRITICAL | can: j1939: fix Use-after-Free, hold skb ref while in use |
| CVE-2023-52755 | 9.8 CRITICAL | ksmbd: fix slab out of bounds write in smb_inherit_dacl() |
| CVE-2021-47378 | 9.8 CRITICAL | nvme-rdma: destroy cm id before destroy qp to avoid use after free |
| CVE-2023-52769 | 8.8 HIGH | wifi: ath12k: fix htt mlo-offset event locking |
| CVE-2021-47308 | 8.8 HIGH | scsi: libfc: Fix array index out of bound exception |
| CVE-2023-52801 | 8.8 HIGH | iommufd: Fix missing update of domains_itree after splitting iopt_area |
| CVE-2023-52798 | 8.8 HIGH | wifi: ath11k: fix dfs radar event locking |
| CVE-2023-52846 | 8.8 HIGH | hsr: Prevent use after free in prp_create_tagged_frame() |
| CVE-2023-52790 | 8.8 HIGH | swiotlb: fix out-of-bounds TLB allocations with CONFIG_SWIOTLB_DYNAMIC |
| CVE-2023-52776 | 8.8 HIGH | wifi: ath12k: fix dfs-radar and temperature event locking |
| CVE-2021-47388 | 8.8 HIGH | mac80211: fix use-after-free in CCMP/GCMP RX |
| CVE-2021-47390 | 8.8 HIGH | KVM: x86: Fix stack-out-of-bounds memory access from ioapic_write_indirect() |
| CVE-2021-47352 | 8.4 HIGH | virtio-net: Add validation for used length |
| CVE-2023-52829 | 8.4 HIGH | wifi: ath12k: fix possible out-of-bound write in ath12k_wmi_ext_hal_reg_caps() |
| CVE-2021-47240 | 8.4 HIGH | net: qrtr: fix OOB Read in qrtr_endpoint_post |
| CVE-2021-47244 | 8.2 HIGH | mptcp: Fix out of bounds when parsing TCP options |
Showing top 20 of 361 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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Same vendor: Linux
-
CVE-2026-98868
dm-pcache: reject a kset that overruns its segment -
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dm-pcache: bound the logical key offset from persistent memo -
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sched/cache: Introduce task_struct->sched_cache_grp to fix U -
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sched_ext: Don't run ops.dequeue() with a DSQ lock held -
CVE-2026-98864
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V. Comments for CVE-2023-52842
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