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CVE-2022-50222 (GCVE-0-2022-50222)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:03 – Updated: 2026-05-11 19:15
VLAI
Title
tty: vt: initialize unicode screen buffer
Summary
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; } ----------
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d8ae7242718738ee1bf9bfdd632d2a4b150fdd26 , < e02fa87e572bb7d90dcdbce9c0f519f1eb992e96 (git)
Affected: d8ae7242718738ee1bf9bfdd632d2a4b150fdd26 , < cc9e874dace0c89ae535230c7da19b764746811e (git)
Affected: d8ae7242718738ee1bf9bfdd632d2a4b150fdd26 , < 5c6c65681f39bf71bc72ed589dec3b8b20e75cac (git)
Affected: d8ae7242718738ee1bf9bfdd632d2a4b150fdd26 , < 446f123aa6021e5f75a20789f05ff3f7ae51a42f (git)
Affected: d8ae7242718738ee1bf9bfdd632d2a4b150fdd26 , < 777a462e1ae50a01fc4a871efa8e34d596a1e17d (git)
Affected: d8ae7242718738ee1bf9bfdd632d2a4b150fdd26 , < e0ef23e9b0ad18b9fd3741b0f1ad2282e4a18def (git)
Affected: d8ae7242718738ee1bf9bfdd632d2a4b150fdd26 , < af77c56aa35325daa2bc2bed5c2ebf169be61b86 (git)
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Linux Linux Affected: 4.19
Unaffected: 0 , < 4.19 (semver)
Unaffected: 4.19.256 , ≤ 4.19.* (semver)
Unaffected: 5.4.211 , ≤ 5.4.* (semver)
Unaffected: 5.10.137 , ≤ 5.10.* (semver)
Unaffected: 5.15.61 , ≤ 5.15.* (semver)
Unaffected: 5.18.18 , ≤ 5.18.* (semver)
Unaffected: 5.19.2 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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      "current_release_date": "2026-06-29T21:43:50+00:00",
      "cve": "CVE-2022-50222",
      "id": "CVE-2022-50222",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tty: vt: initialize unicode screen buffer",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50222.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-02T02:01:09Z",
      "cve": "CVE-2022-50222",
      "id": "CVE-2022-50222",
      "initial_release_date": "2025-06-19T03:38:44Z",
      "product_status:known_affected": "370",
      "product_status:known_not_affected": "358",
      "product_status:recommended": "273",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50222",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50222.json",
      "version": "44"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.