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CVE-2022-50222— tty: vt: initialize unicode screen buffer

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vt未初始化unicode屏幕缓冲区，可能导致信息泄露。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux d8ae7242718738ee1bf9bfdd632d2a4b150fdd26< e02fa87e572bb7d90dcdbce9c0f519f1eb992e96 affected
d8ae7242718738ee1bf9bfdd632d2a4b150fdd26< cc9e874dace0c89ae535230c7da19b764746811e affected
d8ae7242718738ee1bf9bfdd632d2a4b150fdd26< 5c6c65681f39bf71bc72ed589dec3b8b20e75cac affected
d8ae7242718738ee1bf9bfdd632d2a4b150fdd26< 446f123aa6021e5f75a20789f05ff3f7ae51a42f affected
d8ae7242718738ee1bf9bfdd632d2a4b150fdd26< 777a462e1ae50a01fc4a871efa8e34d596a1e17d affected
d8ae7242718738ee1bf9bfdd632d2a4b150fdd26< e0ef23e9b0ad18b9fd3741b0f1ad2282e4a18def affected
d8ae7242718738ee1bf9bfdd632d2a4b150fdd26< af77c56aa35325daa2bc2bed5c2ebf169be61b86 affected
4.19 affected
… +8 more rows
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I. Basic Information for CVE-2022-50222

Vulnerability Information
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Vulnerability Title
tty: vt: initialize unicode screen buffer
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: tty: vt: initialize unicode screen buffer syzbot reports kernel infoleak at vcs_read() [1], for buffer can be read immediately after resize operation. Initialize buffer using kzalloc(). ---------- #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #include <linux/fb.h> int main(int argc, char *argv[]) { struct fb_var_screeninfo var = { }; const int fb_fd = open("/dev/fb0", 3); ioctl(fb_fd, FBIOGET_VSCREENINFO, &var); var.yres = 0x21; ioctl(fb_fd, FBIOPUT_VSCREENINFO, &var); return read(open("/dev/vcsu", O_RDONLY), &var, sizeof(var)) == -1; } ----------
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vt未初始化unicode屏幕缓冲区，可能导致信息泄露。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux d8ae7242718738ee1bf9bfdd632d2a4b150fdd26 ~ e02fa87e572bb7d90dcdbce9c0f519f1eb992e96 -
Linux Linux 4.19 -

II. Public POCs for CVE-2022-50222

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III. Intelligence Information for CVE-2022-50222

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Same Patch Batch · Linux · 2025-06-18 · 362 CVEs total

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CVE-2022-50098 8.8 HIGH scsi: qla2xxx: Fix crash due to stale SRB access around I/O timeouts
CVE-2025-38052 8.8 HIGH net/tipc: fix slab-use-after-free Read in tipc_aead_encrypt_done
CVE-2022-49934 8.8 HIGH wifi: mac80211: Fix UAF in ieee80211_scan_rx()
CVE-2022-50164 8.8 HIGH wifi: iwlwifi: mvm: fix double list_add at iwl_mvm_mac_wake_tx_queue
CVE-2025-38016 8.8 HIGH HID: bpf: abort dispatch if device destroyed
CVE-2025-38074 8.8 HIGH vhost-scsi: protect vq->log_used with vq->mutex
CVE-2022-49974 8.8 HIGH HID: nintendo: fix rumble worker null pointer deref
CVE-2022-49968 8.0 HIGH ieee802154/adf7242: defer destroy_workqueue call
CVE-2022-49944 7.8 HIGH Revert "usb: typec: ucsi: add a common function ucsi_unregister_connectors()"
CVE-2022-49950 7.8 HIGH misc: fastrpc: fix memory corruption on open
CVE-2022-49939 7.8 HIGH binder: fix UAF of ref->proc caused by race condition
CVE-2022-50028 7.8 HIGH gadgetfs: ep_io - wait until IRQ finishes
CVE-2022-49935 7.8 HIGH dma-buf/dma-resv: check if the new fence is really later
CVE-2025-38082 7.8 HIGH gpio: virtuser: fix potential out-of-bound write
CVE-2025-38080 7.8 HIGH drm/amd/display: Increase block_sequence array size
CVE-2025-38079 7.8 HIGH crypto: algif_hash - fix double free in hash_accept
CVE-2025-38060 7.8 HIGH bpf: copy_verifier_state() should copy 'loop_entry' field
CVE-2022-50101 7.8 HIGH video: fbdev: vt8623fb: Check the size of screen before memset_io()
CVE-2025-38062 7.8 HIGH genirq/msi: Store the IOMMU IOVA directly in msi_desc instead of iommu_cookie

Showing top 20 of 362 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-50222

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