tty: vt: initialize unicode screen buffer (Linux Linux)
En bref
- Source
- NVD
- EPSS
- EPSS 0.24 % · centile 15 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- Linux
- Statut NVD
- Analyzed
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; } ----------
Références
- https://git.kernel.org/stable/c/e02fa87e572bb7d90dcdbce9c0f519f1eb992e96
- https://git.kernel.org/stable/c/cc9e874dace0c89ae535230c7da19b764746811e
- https://git.kernel.org/stable/c/5c6c65681f39bf71bc72ed589dec3b8b20e75cac
- https://git.kernel.org/stable/c/446f123aa6021e5f75a20789f05ff3f7ae51a42f
- https://git.kernel.org/stable/c/777a462e1ae50a01fc4a871efa8e34d596a1e17d
- https://git.kernel.org/stable/c/e0ef23e9b0ad18b9fd3741b0f1ad2282e4a18def
- https://git.kernel.org/stable/c/af77c56aa35325daa2bc2bed5c2ebf169be61b86
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
Références européennes
- ENISA EUVD · EUVD-2022-55217
- GCVE · GCVE-0-2022-50222
Avis du CERT-FR
- CERTFR-2026-AVI-0081 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1009 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0649 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0607 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0587 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Configurations affectées (CPE NVD)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.19 < 4.19.256cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.20 < 5.4.211cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.5 < 5.10.137cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.61cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 5.18.18cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.19 < 5.19.2
Produits affectés
| Produit | Versions |
|---|---|
| Linux · Linux | affected d8ae7242718738ee1bf9bfdd632d2a4b150fdd26 < e02fa87e572bb7d90dcdbce9c0f519f1eb992e96 ; affected d8ae7242718738ee1bf9bfdd632d2a4b150fdd26 < cc9e874dace0c89ae535230c7da19b764746811e ; affected d8ae7242718738ee1bf9bfdd632d2a4b150fdd26 < 5c6c65681f39bf71bc72ed589dec3b8b20e75cac ; affected d8ae7242718738ee1bf9bfdd632d2a4b150fdd26 < 446f123aa6021e5f75a20789f05ff3f7ae51a42f ; affected d8ae7242718738ee1bf9bfdd632d2a4b150fdd26 < 777a462e1ae50a01fc4a871efa8e34d596a1e17d ; affected d8ae7242718738ee1bf9bfdd632d2a4b150fdd26 < e0ef23e9b0ad18b9fd3741b0f1ad2282e4a18def |
| Linux · Linux | affected 4.19 ; unaffected 0 < 4.19 ; unaffected 4.19.256 ≤ 4.19.* ; unaffected 5.4.211 ≤ 5.4.* ; unaffected 5.10.137 ≤ 5.10.* ; unaffected 5.15.61 ≤ 5.15.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |