CVE-2026-46209
published 2026-05-28CVE-2026-46209: In the Linux kernel, the following vulnerability has been resolved: drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()…
PriorityP340high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.14%
3.6th percentile
In the Linux kernel, the following vulnerability has been resolved:
drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()
drm_gem_fb_init_with_funcs() computes sub-sampled plane dimensions
using plain integer division:
unsigned int width = mode_cmd->width / (i ? info->hsub : 1);
unsigned int height = mode_cmd->height / (i ? info->vsub : 1);
However, the ioctl-level framebuffer_check() in drm_framebuffer.c uses
drm_format_info_plane_width/height() which round up dimensions via
DIV_ROUND_UP(). This inconsistency corrupts the subsequent GEM object
size check for certain pixel format and dimension combinations.
For example, with NV12 (vsub=2) and a 1-pixel-tall framebuffer the
GEM size validation path sees height=0 instead of height=1. The
expression (height - 1) then wraps to UINT_MAX as an unsigned int,
causing min_size to overflow and wrap back to a small value. A tiny
GEM object therefore passes the size guard, yet when the GPU accesses
the chroma plane it will read or write memory beyond the object's
bounds.
Fix by replacing the open-coded divisions with drm_format_info_plane_width()
and drm_format_info_plane_height(), which use DIV_ROUND_UP() and match
the calculation already used in framebuffer_check().
Affected
18 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 4c3dbb2c312c9fafbac30d98c523b8b1f3455d78 < 11427ad6c9f0def5ce567982b785da3191946430 | 11427ad6c9f0def5ce567982b785da3191946430 |
| linux | linux | >= 4c3dbb2c312c9fafbac30d98c523b8b1f3455d78 < adfc5ba4ef4dd2bca5969f40e8fc7b41fb3902ad | adfc5ba4ef4dd2bca5969f40e8fc7b41fb3902ad |
| linux | linux | >= 4c3dbb2c312c9fafbac30d98c523b8b1f3455d78 < 22922f7dae74409fc4bf0f1142710cb6b8ce8cc2 | 22922f7dae74409fc4bf0f1142710cb6b8ce8cc2 |
| linux | linux | >= 4c3dbb2c312c9fafbac30d98c523b8b1f3455d78 < 6b992591e04f2cce813bcf239b354f375bbf84d3 | 6b992591e04f2cce813bcf239b354f375bbf84d3 |
| linux | linux | >= 4c3dbb2c312c9fafbac30d98c523b8b1f3455d78 < 1da4ab7189f1064b3b712b388772c008b4d82580 | 1da4ab7189f1064b3b712b388772c008b4d82580 |
| linux | linux | >= 4c3dbb2c312c9fafbac30d98c523b8b1f3455d78 < 1a17ea9861e89585361caa8bc231bd22dc6dbe7d | 1a17ea9861e89585361caa8bc231bd22dc6dbe7d |
| linux | linux | >= 4c3dbb2c312c9fafbac30d98c523b8b1f3455d78 < c5fc49d8470c5ebf3b41607600f277158f159950 | c5fc49d8470c5ebf3b41607600f277158f159950 |
| linux | linux | >= 4c3dbb2c312c9fafbac30d98c523b8b1f3455d78 < 3d4c2268bd7243c3780fe32bf24ff876da272acf | 3d4c2268bd7243c3780fe32bf24ff876da272acf |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 4.14 < 5.10.258 | 5.10.258 |
| linux | linux_kernel | >= 5.11 < 5.15.209 | 5.15.209 |
| linux | linux_kernel | >= 5.16 < 6.1.175 | 6.1.175 |
| linux | linux_kernel | >= 6.13 < 6.18.32 | 6.18.32 |
| linux | linux_kernel | >= 6.19 < 7.0.9 | 7.0.9 |
| linux | linux_kernel | >= 6.2 < 6.6.140 | 6.6.140 |
| linux | linux_kernel | >= 6.7 < 6.12.90 | 6.12.90 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vendor_redhat7.0HIGH
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Red Hat
kernel: drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()
vendor_redhat·2026-05-28·CVSS 7.0
CVE-2026-46209 [HIGH] CWE-190 kernel: drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()
kernel: drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()
A flaw was found in the Linux kernel's Direct Rendering Manager (DRM) Graphics Execution Manager (GEM) component. This vulnerability arises from an inconsistent calculation of plane dimensions, which can lead to incorrect memory allocation checks. A local attacker could exploit this by creating a specially crafted Graphics Execution Manager (GEM) object that bypasses security validations. This could allow the GPU to access memory outside its designated area, potentially leading to memory corruption, information disclosure, or the execution of unauthorized code.
Package: kernel (Red Hat Enterprise Linux 10) - Affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (
GHSA
GHSA-f8g6-g8cv-582v: In the Linux kernel, the following vulnerability has been resolved:
drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_fun
ghsa_unreviewed·2026-05-28
CVE-2026-46209 GHSA-f8g6-g8cv-582v: In the Linux kernel, the following vulnerability has been resolved:
drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_fun
In the Linux kernel, the following vulnerability has been resolved:
drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()
drm_gem_fb_init_with_funcs() computes sub-sampled plane dimensions
using plain integer division:
unsigned int width = mode_cmd->width / (i ? info->hsub : 1);
unsigned int height = mode_cmd->height / (i ? info->vsub : 1);
However, the ioctl-level framebuffer_check() in drm_framebuffer.c uses
drm_format_info_plane_width/height() which round up dimensions via
DIV_ROUND_UP(). This inconsistency corrupts the subsequent GEM object
size check for certain pixel format and dimension combinations.
For example, with NV12 (vsub=2) and a 1-pixel-tall framebuffer the
GEM size validation path sees height=0 instead of height=1. The
expression (heigh
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/11427ad6c9f0def5ce567982b785da3191946430https://git.kernel.org/stable/c/1a17ea9861e89585361caa8bc231bd22dc6dbe7dhttps://git.kernel.org/stable/c/1da4ab7189f1064b3b712b388772c008b4d82580https://git.kernel.org/stable/c/22922f7dae74409fc4bf0f1142710cb6b8ce8cc2https://git.kernel.org/stable/c/3d4c2268bd7243c3780fe32bf24ff876da272acfhttps://git.kernel.org/stable/c/6b992591e04f2cce813bcf239b354f375bbf84d3https://git.kernel.org/stable/c/adfc5ba4ef4dd2bca5969f40e8fc7b41fb3902adhttps://git.kernel.org/stable/c/c5fc49d8470c5ebf3b41607600f277158f159950
2026-05-28
Published