CVE-2022-50222
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-50222
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50222.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-50222
- Related
- Published
- 2025-06-18T11:15:53Z
- Modified
- 2025-06-18T16:49:15.967129Z
- Downstream
- Summary
- [none]
- Details
-
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 fbvarscreeninfo var = { }; const int fbfd = open("/dev/fb0", 3); ioctl(fbfd, FBIOGETVSCREENINFO, &var); var.yres = 0x21; ioctl(fbfd, FBIOPUTVSCREENINFO, &var); return read(open("/dev/vcsu", ORDONLY), &var, sizeof(var)) == -1; }
- References
-
- https://git.kernel.org/stable/c/446f123aa6021e5f75a20789f05ff3f7ae51a42f
- https://git.kernel.org/stable/c/5c6c65681f39bf71bc72ed589dec3b8b20e75cac
- https://git.kernel.org/stable/c/777a462e1ae50a01fc4a871efa8e34d596a1e17d
- https://git.kernel.org/stable/c/af77c56aa35325daa2bc2bed5c2ebf169be61b86
- https://git.kernel.org/stable/c/cc9e874dace0c89ae535230c7da19b764746811e
- https://git.kernel.org/stable/c/e02fa87e572bb7d90dcdbce9c0f519f1eb992e96
- https://git.kernel.org/stable/c/e0ef23e9b0ad18b9fd3741b0f1ad2282e4a18def
- https://security-tracker.debian.org/tracker/CVE-2022-50222
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed5.10.140-1
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source